Patent Publication Number: US-7895694-B2

Title: Extendable rotary scrubber

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is related to co-pending U.S. patent application Ser. Nos. 11/528,272, 11/528,271 and 29/272,571, each filed on Sep. 27, 2006, each of which are incorporated by reference herein. 
     TECHNICAL FIELD 
     This relates generally to devices used in the removal of excess spray-applied insulation from building components, and more particularly to an improved rotary scrubber that is readily extendable for reaching areas of extended elevation. 
     BACKGROUND 
     Sprayed insulation is commonly used in the construction industry for insulating the open cavities of building walls, floors, ceilings, attics and other areas. Insulation materials, such as loose fiberglass, rock wool, mineral wool, fibrous plastic, cellulose, ceramic fiber, etc., that is combined with an adhesive or water, are sprayed from an applicator into such open cavities to reduce the rate of heat loss or gain there-though. The adhesive properties of the insulation mixture, resulting from the combination of the insulation materials with the adhesive or water, allow it to adhere to vertical or overhanging surfaces, thus allowing for an application of insulation prior to the installation of wallboard and similar cavity enclosing materials. 
     In applying sprayed insulation into open cavities, an installer typically holds an outlet end of the applicator towards the open cavity and then sprays the insulation and adhesive mixture into the cavity until the cavity is filled. To ensure that the cavity is completely filled, an installer typically sprays an excess amount of the mixture into the cavity such that an excess quantity (i.e. overfill) of the sprayed insulation has accumulated beyond an opening of the cavity defined by the cavity&#39;s confining boundaries, i.e. beyond the wall studs, floor or ceiling joists or other framing members defining the cavity. Such an excess amount or overfill is often necessary to ensure a complete fill of the cavity with the insulation mixture, thus minimizing the presence of gaps or voids therein and ensuring that the claimed thermal or acoustic performance, as specified by the manufacturer of the insulation product, is met. 
     However, to allow for the installation of wallboard, a vapor retarder or other surface materials over the cavity after receiving the insulation mixture, the excess or overfill insulation must be compacted into the cavity or removed therefrom to allow the surface materials to lay flush against the framing members. Excess insulation mixture located on the faces or outer surfaces of the framing members must be removed as well. The excess or overfill sprayed insulation mixture is thus removed or “scrubbed” from the cavity and faces of the framing members with a rotary scrubber to define an outer surface or boundary of the mixture at the cavity&#39;s opening lying preferably co-planar with the faces of the framing members. 
     The rotary scrubber generally comprises a hand-held device having a rotating, motor-driven roller assembly attached thereto. The roller assembly, typically located at a forward end of a framework of the device and including at least one cylindrical brush or textured roller, is driven to rotate by a motor and associated drive belt, also located on the device. The drive belt is in contact with the roller assembly via a pulley or channel defined in the outer surface of the brush or roller. The rotating roller assembly preferably has an end-to-end length that spans or exceeds the width of a building cavity as defined by the framing members. Thus, during the removal process, the rotating roller assembly is positioned against the faces of the framing members to span the width of the cavity. The rotating roller assembly is then pulled along the framing members, preferably in a direction about parallel thereto, such that the brush or roller of the assembly contacts and scrubs the excess of overfill insulation mixture from the cavity and framing members, thus creating the outer surface or boundary of the insulation that is preferably co-planar with the framing members. 
     Although various rotary scrubbers are presently available to facilitate the removal of excess or overfill sprayed insulation mixtures from building cavities, numerous disadvantages exist with these scrubbers. For example, presently-available scrubbers are not readily adaptable for the removal of insulation mixture from building cavities of extended elevation, thus limiting the vertical reach of these devices. The removal of insulation mixture from areas of extended elevation using such presently-available scrubbers thus often requires the cumbersome use of ladders, step-stools or scaffolding. Although some presently-available scrubbers allow for an extension of vertical reach, the framework of such devices must be fitted or substituted with an “extension” that increases the length of the framework (i.e. arms) that support the devices&#39; roller assembly. However, because increasing the length of the framework supporting the roller assembly of these devices also typically increases the distance between the belt-driven roller assembly and the drive motor, a longer drive belt must also be utilized with these devices along with the extension. 
     Fitting an extension and associated drive belt to a presently-available scrubber thus requires a disassembly and re-assembly of the device and necessitates the requisite additional extension and belt components. The disassembly and re-assembly of a scrubber to accommodate an extension and associated drive belt thus increases the nonproductive “down-time” of an insulation installation project, while the need for additional belts results in the need to purchase and maintain additional equipment components. Both result in an undesirable increase in project cost. 
     Disadvantages are also inherently associated with the design and structure of presently-available rotary scrubbers. Presently-available scrubbers typically utilize either a singular or a “U-shaped” framework in association with a singular drive belt to support and drive the rotating roller assembly. The singular framework, typically having the roller assembly located at a forward end of a single extending member, has the drive belt located about the member and over the forward portion of the member at the roller assembly. The “U-shaped” framework, typically having the roller assembly located at the forward ends of twin extending members of the U-shaped frame, typically has the belt located between the twin extending members of the frame. 
     The singular framework is subject to undesirable bending due to torsion forces applied through the ends of the roller assembly when pulled along the faces or outer surfaces of building cavity framing members during scrubbing procedures. The singular framework is also subject to bending or other damage if the rotary scrubber is inadvertently dropped. Although the “U-shaped” framework may overcome the bending deficiencies of the singular framework, its use in association with a singular drive belt results in a “gouging” of insulation material from the building cavity. Because each twin extending member of the U-shaped frame, where connected to the rotating roller assembly, does not have the belt located about the member and over the forward portion thereof at the brush or roller, the non-moving forward portion of each member drags against the insulation during scrubbing procedures, thus resulting in the occurrence of such undesirable gouging. 
     Furthermore, the singular drive belt, in transmitting rotational energy from the drive motor to the rotating roller assembly, must overcome the resistance forces created through a contact of the roller assembly with both the faces of the building cavity framing members and the excess or overfill insulation scrubbed from the cavity itself. Such resistance forces are transmitted through the roller assembly to the drive belt via the contact between belt and the pulley or channel of the cylindrical brush or roller of the assembly. Because only a singular belt is in contact the cylindrical brush or roller of the roller assembly, the contact between the belt and assembly is often insufficient to overcome the resistance forces acting on the assembly, thus resulting in belt-slip and an undesirable “stalling” of the rotating roller assembly. 
     Thus, what is needed is a rotary scrubber that has a readily-adjustable vertical reach for accommodating the scrubbing of insulation from building cavities of extended elevation, without requiring either a disassembly of the scrubber&#39;s framework supporting the roller assembly or the need for additional belt components. The scrubber should have a framework and associated belt drive system that overcomes both the rigidity disadvantages of single-member frames and the gouging disadvantages of multi-member frames. The belt drive system of the scrubber should also readily overcome any resistance forces occurring between the belt drive and roller assembly to avoid belt slip and a stalling of the rotating roller assembly itself. This fulfills these foregoing needs. 
     SUMMARY 
     This relates generally to devices used in the removal of excess spray-applied insulation from building components, and more particularly to an improved rotary scrubber that is readily extendable for reaching areas of extended elevation. The extendable scrubber comprises a housing having forward and rearward ends and a framework having first and second ends, with the second end of the framework defining at least a forward end of at least one arm. In one embodiment, the first end of the framework is connected to the housing, with the connection of the framework to the housing preferably comprising a removable connection. The scrubber further comprises a roller assembly, comprised of at least one roller, rotatably associated with the at least a forward end of the at least one arm, with a motor connected to the housing and operably associated with at least one drive belt. Each at least one drive belt is operably associated with the roller assembly. 
     To extend the reach of the respective scrubbers, in one embodiment they further comprise an adjustable handle assembly connected to the housing while in another embodiment they further comprise at least one extender optionally removably connectable between the housing and the framework, with the at least one extender operably associating the at least one drive belt with the motor when connected there-between. In additional embodiments, each drive belt of the at least one drive belt is preferably entrained around the at least a forward end of each arm to prevent a gouging of the excess insulation during scrubbing procedures. However, it is understood that each at least one drive belt may be located on the respective scrubber and not entrained around the at least a forward end of each arm as well. 
     In one embodiment of the extendable scrubber, the housing comprises a lower portion and an upper portion defining an enclosure, with the upper portion preferably defining a cover that is preferably removable from the lower portion to allow access to the enclosure. The first end of the framework is preferably connected to the forward end of the housing. In alternate embodiments, the housing preferably comprises a ferrule member defined by the housing&#39;s forward and rearward ends and an inner cylindrical surface, with the first end of the framework preferably comprising a gearbox connected thereto and adapted for removable connection with either the housing or optionally the at least one extender. 
     In one embodiment, the framework defines at least forward and rearward ends of the arm or arms of the extendable scrubber. In other embodiments, the framework defines a gearbox, a brace connected to the gearbox, at least one bracket adjustably connected to the brace, and at least forward end rearward arm ends, with the rearward end of the arm or arms connected to the at least one bracket. The connection between the gearbox and the remaining framework is adjustable to facilitate the adjustment of the tension of the at least one drive belt. In yet another embodiment, the at least one bracket and brace of the framework may be unitary to define a unitary portion at the framework&#39;s first end for connection with housing via the framework&#39;s gearbox. The framework having the gearbox further comprises a receiver, defined thereon to facilitate the connection of the housing and/or at least one extender to the framework. 
     Each at least a forward end of the arm or arms of the at least one arm defines a through, roller assembly bore that accommodates a roller assembly shaft to define the rotatable association of the roller assembly with the forward end of the at least one arm. For embodiments of the extendable scrubber having a framework defining the at least forward ends of a pair of arms of the at least one arm, the roller assembly, rotatably associated with the at least forward ends of the arms, preferably comprises a central roller and two outer rollers of the at least one roller. The central roller is located between the at least forward ends of the arms while the at least two outer rollers are axially aligned with the central roller and located outwardly of the arm ends. For embodiments of the extendable scrubber having a framework defining the at least a forward end of only a single arm of the at least one arm, the central roller is not utilized while first and second rollers of the at least one roller are axially aligned and located adjacent to opposite sides of the arm end. 
     In one embodiment, each at least one roller of the roller assembly rotates about the shaft connected to the at least forward ends of the arm or arms of the at least one arm via thrust bearing and race assemblies located between the shaft and each roller. In another embodiment, each at least one roller of the assembly is affixed to the shaft, with the shaft rotatably connected to the arm or arms of the scrubber via one or more press-fit bearing and race assemblies located there-between. 
     To accommodate the operable relation between the roller assembly and the scrubber&#39;s drive belt or belt, in one embodiment, the outer surface of each roller defines a circumferal inlet that together define a groove or grooves in the roller assembly for operable engagement with the drive belt or belts. Alternatively, roller supports located at roller ends adjacent to the arm or arms of the scrubber each define a pulley surface that together define a pulley or pulleys in the roller assembly for operable engagement with the drive belt or belts. 
     The roller assembly is comprised of durable materials. In one embodiment, each at least one roller of the roller assembly is comprised of a polyurethane material having a durometer hardness range of between about 60 A and about 85 D, preferably about 75 D. It is understood, however, that polyurethane rollers of other durometer hardness may be utilized, as well as rollers comprised of other materials (i.e., aluminum, plastic, rubber, etc). Each at least one roller of the roller assembly preferably has a plurality of ribs defined in its outer surface. The ribs may be machined or cut into the outer surface of each roller, or the ribs may be formed by a molding or extrusion process. Each rib may have a triangular cross-section, a cross-section defining at least two right angles, or a cross-section defining a blade. 
     The motor, preferably connected to the housing, is operably associated with the drive belt or belts of the at least one drive belt, with such operable association preferably comprising at least one drive pulley or drive pulleys, respectively, engaging the belts and driven by the motor, or driven by the gearbox operably associated with the motor. In one embodiment, the motor drives the drive pulleys with a double-ended output shaft having a pulley connected at each end. With this configuration, the motor is preferably connected to the lower portion of the housing, with the output shaft oriented transverse to the at least forward ends of the arm or arms of the framework. In another embodiment, the drive pulleys are driven by a gearbox connected to the housing and operably associated with the motor. With this configuration, the motor is preferably connected to the lower portion of the housing, with the motor&#39;s output shaft driving the gearbox also connected to the lower portion of the housing. The gearbox output shaft has the drive pulleys connected at its respective ends. 
     In yet another embodiment, the motor is preferably connected at the rearward end of the housing with the gearbox of the framework removably connected at the forward end of the housing. The gearbox output shaft again has drive pulleys connected at its respective ends. The housing operably associates the gearbox with the motor wherein the housing preferably comprises a ferrule member enclosing a housing drive link. The output shaft of the motor preferably drives the gearbox via the housing drive link enclosed by the ferrule member of the housing, with the rearward end of the link connected to the output shaft of the motor and the forward end of the link removably connected to an input shaft of the gearbox. To facilitate the removable connection of the forward end of the housing to the gearbox of the framework, the receiver of the gearbox, defined at the rearward end thereof, is adapted to accept a removable insertion of the forward end of the housing ferrule member therein. Thus, the removable connection of both the forward end of the housing drive link to the input shaft of the gearbox and the forward end of the housing to the gearbox itself facilitates a removal of the framework from the housing to allow for the optional utilization of the at least one extender between the housing and framework. However, it is understood that further embodiments of the scrubber of may have a connection between the housing and framework that does not facilitate their removal from one another as well. 
     To facilitate the scrubbing of insulation from areas of extended elevation, one embodiment of the scrubber comprises an adjustable handle assembly connected to the housing. The adjustable handle assembly preferably comprises a receiver connected to the housing and an extension and a support handle adjustably connected with the receiver. The extension preferably defines an extension handle, with the support handle adjustably connected with the receiver forward of the extension handle when the extension is adjustably connected with the receiver. The adjustable connection of the extension with the receiver preferably comprises a mating engagement of at least a forward end of the extension with the receiver, and an extension fixator for releasably connecting the extension along the receiver. The adjustable connection of the support handle with the receiver preferably comprises a support handle fixator for releasably connecting the support handle along the receiver. In other embodiments, the extension fixator and the support handle fixator comprise a common fixator. 
     To facilitate the scrubbing of insulation from areas of extended elevation, other embodiments of the scrubber comprise at least one extender optionally removably connectable between the housing and the framework, with the at least one extender operably associating the at least one drive belt with the motor when connected there-between. The at least one extender comprises an extender ferrule member enclosing an extender drive link, with the extender ferrule member and drive link defining forward and rearward ends. To facilitate the removable connection of at least the forward end of the at least one extender to the gearbox of the framework, the forward end of the extender ferrule member is adapted for removable insertion into at least the receiver of the gearbox. 
     The forward end of the extender drive link is adapted for removable connection with the gearbox input shaft. The forward end of the housing is thus removably connectable with either the gearbox or the rearward end of the at least one extender while the forward end of the housing drive link is thus removably connectable with either the gearbox input shaft or the rearward end of the extender drive link. The forward ends of the at least one extender and extender drive link, in turn, are thus respectively removably connectable with at least the gearbox and gearbox input shaft, and optionally another with extender and extender drive link. The at least one extender, may comprise any number of extenders, from one extender to a plurality of extenders. If desired, a plurality of extenders may be utilized in end-to-end relation, with each extender adapted for a removable connection between the housing and the framework, between another extender and the framework, between another extender and the housing or between other extenders of the plurality. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of one embodiment of the extendable scrubber having a framework defining the at least forward and rearward ends of at least a one arm, with a portion of the housing removed to better illustrate the motor and related components; 
         FIG. 2  is a plan view of an alternate embodiment of the extendable scrubber having a framework defining the at least forward and rearward ends of at least one arm and illustrating the motor, gearbox and related components; 
         FIG. 3  is a perspective view of one embodiment of the extendable scrubber having a framework defining the at least forward and rearward ends of two arms of the at least at least one arm, with a portion of the housing removed to better illustrate the motor and related components; 
         FIG. 4  is a plan view of an alternate embodiment of the extendable scrubber having a framework defining the at least forward and rearward ends of two arms of the at least one arm and illustrating the gearbox of the framework, as well as the motor and related components; 
         FIG. 5  is a perspective assembly view of the housing, framework, roller assembly and shaft of the extendable scrubber of  FIG. 3 ; 
         FIG. 6  is a perspective assembly view of the framework, roller assembly and shaft of the extendable scrubber of  FIG. 4 ; 
         FIG. 7  is a perspective assembly view of illustrating an alternate embodiment of the framework of  FIG. 6  having a unitary first end; 
         FIG. 8  is a sectional assembly view of the roller assembly of  FIGS. 1 and 2  illustrating its relationship with the drive belt, shaft and arm end; 
         FIG. 9  is a sectional assembly view of the roller assembly of  FIGS. 3 and 4  illustrating its relationship with the drive belts, shaft and arm ends; 
         FIG. 10  is a sectional assembly view of the roller assembly  FIGS. 1 and 2  illustrating an alternate relationship with the drive belt, shaft and arm end; 
         FIG. 11  is a sectional assembly view of the roller assembly  FIGS. 3 and 4  illustrating an alternate relationship with the drive belts, shaft and arm ends; 
         FIG. 12  is a sectional view of the roller assembly of  FIGS. 1 and 2  illustrating the circumferal inlets defining the groove for the belt; 
         FIG. 13  is a sectional view of the roller assembly of  FIGS. 3 and 4  illustrating the respective circumferal inlets defining the grooves for the belts; 
         FIG. 14  is a side view of the at least forward and rearward arm ends illustrating their relationship with the central roller and drive belt; 
         FIG. 15  is an end view of the at least one roller of the roller assembly having an outer surface defining ribs having a triangular cross-section; 
         FIG. 16  is an end view of the at least one roller of the roller assembly having an outer surface defining ribs having a cross-section defining at least two right angles; 
         FIG. 17  is an end view of the at least one roller of the roller assembly having an outer surface wherein each rib has a cross-section defining a blade; 
         FIG. 18  is a plan view of the extendable scrubber of  FIG. 3  having a portion of the housing removed to better illustrate one embodiment of the operable association of the motor with the drive pulleys; 
         FIG. 19  is a plan view of the extendable scrubber of  FIG. 3  having a portion of the housing removed to better illustrate another embodiment of the operable association of the motor with the drive pulleys; 
         FIG. 20  is a plan view of the extendable scrubber of  FIG. 4  having the housing removed to better illustrate another embodiment of the operable association of the motor with the drive pulleys; 
         FIG. 21  is a perspective view of an embodiment of the adjustable handle of the extendable scrubber of  FIGS. 1 and 3  having a support handle fixator and an extension fixator; 
         FIG. 22  is a perspective view of an embodiment of the adjustable handle of the extendable scrubber of  FIGS. 1 and 3  having a common fixator; 
         FIG. 23  is a perspective view of another embodiment of the adjustable handle of the extendable scrubber of  FIGS. 1 and 3  having a common fixator; 
         FIG. 24  is a plan view of the extendable scrubber of  FIG. 4  illustrating the optional at least one extender located between the scrubber&#39; housing and gearbox; and 
         FIG. 25  is a detailed assembly view of the at least one extender of  FIG. 24 . 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     This relates generally to devices used in the removal of excess spray-applied insulation from building components, and more particularly to an improved rotary scrubber that is readily extendable for reaching areas of extended elevation.  FIGS. 1 and 2  each illustrate the basic components of respective alternate embodiments of the extendable scrubber  5 . As illustrated therein, the extendable scrubber  5  comprises a housing  10  defining forward and rearward ends  15  and  20 , and a framework  25  having first and second ends  30  and  35 , with the second end of the framework defining at least a forward end  40  of at least one arm  45 , illustrated as a single arm  46 . In the embodiment of  FIG. 1 , the first end  30  of the framework  25  is connected to the housing  10 , with the connection of the framework to the housing of the embodiment of  FIG. 2  preferably comprising a removable connection. The scrubber  5  further comprises a roller assembly  50 , comprised of at least one roller  52 , rotatably associated with the at least a forward end  40  of the at least one arm  45 , with a motor  55  connected to the housing  10  and operably associated with at least one drive belt  60 , illustrated as drive belt  61  in  FIGS. 1 and 2 . The at least one drive belt  60  (belt  61  shown in section in  FIG. 2  to better illustrate the arm  46  of the at least one arm  45 ) is operably associated with the roller assembly  50 . 
       FIGS. 3 and 4  illustrate by example embodiments of scrubbers  5  defining the at least forward ends  40  of multiple arms of the at least one arm  45 . Although the figures illustrate the at least forward ends of two arms  46   a  and  46   b  of the at least one arm  45 , it is understood that other scrubber embodiments can utilize the at least forward ends of any number of arms. As illustrated therein, the extendable scrubber  5  comprises a housing  10  defining forward and rearward ends  15  and  20 , and a framework  25  having first and second ends  30  and  35 , with the second end of the framework defining the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45 . In the embodiment of  FIG. 3 , the first end  30  of the framework  25  is again connected to the housing  10 , with the connection of the framework to the housing of the embodiment of  FIG. 4  again preferably comprising a removable connection. The scrubber  5  further comprises the roller assembly  50 , comprised of at least one roller  52 , rotatably associated with the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45 , with a motor  55  connected to the housing  10  and operably associated with drive belts  61   a  and  61   b  of the at least one drive belt  60 . Each drive belt  61   a  and  61   b  of the at least one drive belt  60  (belt  61   a  shown in section in  FIG. 4  to better illustrate the arm  46   a  of the at least one arm  45 ) is operably associated with the roller assembly  50 . 
     In a variation of the embodiments of the scrubber  5  illustrated in  FIGS. 3 and 4 , the second end  35  of the framework  25  defines at least forward ends  40  of at least a pair of arms  46   a  and  46   b . The first end  30  of the framework  25  is again connected to the housing  10 , with the connection of the framework to the housing of the embodiment of  FIG. 4  again preferably comprising a removable connection. The roller assembly  50 , again comprised of at least one roller  52 , is rotatably associated with the at least forward ends  40  of the at least a pair of arms  46   a  and  46   b , with a motor  55  connected to the housing  10  and operably associated with at least a pair of drive belts  61   a  and  61   b . The at least a pair of drive belts  61   a  and  61   b  is operably associated with the roller assembly  50 . 
     To extend the reach of the respective scrubbers  5 , the scrubbers of  FIGS. 1 and 3  further comprise an adjustable handle assembly  65  connected to the housing  10  while the scrubbers of  FIGS. 2 and 4  further comprise at least one extender  70  (see  FIG. 24 ) optionally removably connectable between the housing  10  and the framework  25 , with the at least one extender operably associating the at least one drive belt  60  (i.e., drive belt  61  or drive belts  61   a  and  61   b ) with the motor  55  when connected there-between. The scrubbers of  FIGS. 2 and 4  may also include an adjustable handle assembly  65  connected to the housing  10  to facilitate a gripping of the scrubber by users. Also, for the scrubbers  5  of  FIGS. 1-4 , each at least one drive belt  60  (i.e. drive belt  61  of  FIGS. 1 and 2 ; drive belts  61   a  and  61   b  of  FIGS. 3 and 4 ) is preferably entrained around the at least a forward end  40  of each at least one arm  45  (i.e. arm  46  of  FIGS. 1 and 2 ; arms  46   a  and  46   b  of  FIGS. 3 and 4 ) to prevent a gouging of the excess insulation during scrubbing procedures. However, it is understood that each at least one drive belt  60  may be located on the respective scrubber and not entrained around the at least a forward end of each arm as well. 
     As illustrated in  FIGS. 1 and 3  in one embodiment of the extendable scrubber  5 , the housing  10 , illustrated with a portion removed to better show the scrubber&#39;s other components, preferably comprises a lower portion  75  having first and second sides  80  and  85  and an upper portion  90  having respective first and second sides  95  and  100 , with both portions defining an enclosure  105 . The upper portion  90  preferably defines a cover that is preferably removable from the lower portion  75  to allow access to the enclosure  105 . The first end  30  of the framework  25  is preferably connected to the forward end  15  of the housing  10 . As illustrated therein, the first end  30  of the framework  25  preferably defines at least a rearward end  110  of the at least one arm (i.e., arm  46  or arms  46   a  and  46   b ) with the at least a rearward end of the at least one arm connected to the housing (i.e. rearward end or ends  110  preferably connected to the side  80  or sides  80  and  85 , respectively). 
     In the alternate embodiments of  FIGS. 2 and 4 , the housing  10  preferably comprises a housing ferrule member  115  having ends defined by the housing&#39;s forward and rearward ends  15  and  20 , and an inner cylindrical surface  120 . The first end  30  of the framework  25  preferably comprises a gearbox  125  connected thereto and adapted for removable connection with either the housing  10  or the at least one extender  70  (see  FIG. 24 ). It is understood however, the gearbox  125  of the framework  25  is not removably connected to the housing  10  in scrubber embodiments not having a removable connection between the housing and the framework. As illustrated therein, the framework  25  preferably defines the at least rearward ends  110  of the arm  46  or arms  46   a  and  46   b  of the at least one arm  45 , with such rearward ends located preferably proximal to the gearbox  125  of the framework. 
     The housing  10  of  FIGS. 1-4  is comprised of any rigid material capable of supporting the remaining components of the scrubber  5 . In one embodiment, the housing  10  is comprised of aluminum because of its rigid, lightweight and corrosion-resistant properties. However, it is understood that various other rigid materials may be utilized as well for the housing, to include various ferrous and non-ferrous metals and/or alloys, high strength plastic materials or composite materials, etc. The framework  25 , defining the at least a forward end  40  of the at least one arm  45 , is also preferably comprised of aluminum, again because of its rigid, lightweight and corrosion-resistant properties. However, it is again understood that other rigid materials may be utilized as well for the framework, to include various ferrous and non-ferrous metals and/or alloys, high strength plastic materials or composite materials, etc. 
       FIG. 5  is an assembly view illustrating the roller assembly  50 , the framework  25  defining the at least forward and rearward ends  40  and  110  of the arms  46   a  and  46   b,  and the housing  10  of the extendable scrubber  5  illustrated in  FIG. 3 .  FIG. 6  illustrates the roller assembly  50 , as well as the gearbox  125  and the at least forward and rearward ends  40  and  110  of the arms  46   a  and  46   b  of the framework  25  of the scrubber  5  illustrated in  FIG. 4 . As illustrated in both figures, in addition to the framework  25  defining at least forward and rearward ends  40  and  110  of the arms  46   a  and  46   b  of the at least one arm  45 , the framework also defines the inner and outer sides  130  and  135  and upper and lower edges  140  and  145  of the ends of the respective arms as well. For the framework  25  defining at least forward and rearward ends  40  and  110  of a single arm  46  of the at least one arm  40 , the framework defines opposite sides  127  and  128  of the arm in addition to the upper and lower edges  140  and  145  (see  FIGS. 1 and 2 ). 
     Referring to  FIG. 5 , the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45  are preferably connected at the forward end  15  of the housing  10  such that the outer sides  135  of the arm ends are located preferably adjacent to the inner surfaces  150  defined respectively by the sides  80  and  85  of the lower portion  75  housing  10 . A longitudinal slot  155  is preferably defined in each side of the housing  10  that is co-aligned with a pair of bores  160  respectively defined in each at least rearward arm end  110 . The respective bores  160  are preferably threaded and adapted to accept a pair of bolts  165  through the slots  155  to secure the at least rearward arm ends  110  of the framework  25  to the housing  10 . The slots  155  allow for an adjustable translation of the at least rearward ends  110  of the arms  46   a  and  46   b  and bolts  165  in relation to the housing  10  such that, in one embodiment, the at least a rearward end of the at least one arm of the framework  25  is adjustably connected to the housing to facilitate the adjustment of the tension of the belts  61   a  and  61   b  of the at least one belt  60 . 
     However, it is understood that the slots  155  may be respectively defined in the at least rearward ends  110  of the arms  46   a  and  46   b  and the bores  160  defined in housing&#39;s sides  80  and  85  to facilitate the same adjustment as well. It is further understood that the pair of bores may be defined in place of the slots  155  of each housing side, for alignment with the bores  160  of arms  46   a  and  46   b , such that the connection of the at least rearward ends of the arms to the housing  10  via the bolts is not adjustable. Furthermore, although  FIG. 5  illustrates the relationship between the housing  10  and the at least rearward ends of the arms  46   a  and  46   b  of the at least one arm  45  defined by the framework, it is understood that the at least a rearward end of a single arm of the at least one arm defined by the framework would have a similar relationship with the housing as well. 
     Referring to  FIG. 6 , the framework  25 , in one embodiment, further comprises a brace  170  defining upper and lower portions  175  and  180  connected to the gearbox  125 , and at least one bracket  185  preferably adjustably connected to the brace and defining opposing outer ends  190 . The gearbox  125  is preferably connected between the brace upper and lower portions  175  and  180  via a plurality of bolts  165  that extend through bores  195  defined in the portions and into threaded bores  200  defined in the gearbox. In the embodiment of  FIG. 6 , the framework  25  defines the at least a rearward end  110  of the at least one arm  45  (i.e., ends  110  of arms  46   a  and  46   b ), with the at least a rearward end of the at least one arm preferably connected to the at least one bracket  185 . The at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45  are connected to the at least one bracket  185  such that the inner sides  130  of the arms are located preferably adjacent to the outer ends  190  of the at least one bracket. A pair of bores  160  is preferably defined in each arm end  110  that is co-aligned with horizontal threaded bores  205  defined in the outer ends  190  of the at least one bracket  185 . The threaded bores  205  are each adapted to accept the insertion of a pair of bolts  165  through the bores  160  to secure the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45  to the at least one bracket  185 . 
     The at least one bracket  185  also preferably defines upper and lower portions  210  and  215 , with both portions defining a pair of threaded vertical bores  220  centrally located therein. The vertical bores  220  of the at least one bracket are aligned with a lengthwise slot  225  defined in the upper and lower portions  175  and  180  of the brace  170  such that a pair of bolts  165  is threadedly associated with the vertical bores through the slot. Thus, the connection of the at least one bracket  185  to the brace  170  is preferably adjustable. The slot  225  allows for an adjustable translation of the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45 , via the at least one bracket  185  and bolts  165  in relation to the gearbox  125 , such that the arm ends and gearbox of the framework are adjustably connected to one another. Thus, the connection between the gearbox to the remaining framework is adjustable to facilitate the adjustment of the tension of the at least one drive belts  60 . 
     However, it is understood that the framework  25  may further comprise sides between the upper and lower portions  175  and  180  of the brace  170 , in place of the at least one bracket  185 , with bores or slots defined in the sides for co-alignment with bores or slots defined in the arms, to facilitate the adjustable or non-adjustable connection of the at least rearward ends of the arms to the gearbox via the bolts as well. It is also understood that the at least one bracket  185  may comprise a plurality of bracket components  192  connected to the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45  (see  FIG. 20 ). It is further understood that although  FIG. 6  illustrates the gearbox  125  as having the upper and lower portions  175  and  180  of the brace  170  connected thereto via bolts  165 , with the bolts extending through bores  195  defined in the upper and lower portions of the brace and threadedly engaged with bores  200  defined in the gearbox, it is understood that the upper and lower portions of the brace may be unitary with the gearbox as well. 
     In yet another embodiment of the framework of  FIG. 6 , the at least one bracket and brace of the framework  25  may be unitary to define a unitary portion  230  at the framework&#39;s first end  30  for connection with the housing  10  via the framework&#39;s gearbox  125 .  FIG. 7  thus illustrates the framework  25  having first and second ends  30  and  35 , with the second end of the framework again defining the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45 . The first end  30  of the framework  25  thus defines the unitary portion  230  having the gearbox  125  connected thereto. The unitary portion  230  defined at the first end  30  of the framework  25  preferably defines upper and lower members  235  and  240  located between opposite sides  245  and  250 . A slot  255  is preferably defined in the respective upper and lower members  235  and  240  for co-alignment with threaded bores  260  of the gearbox  125 , located there-between, to facilitate an adjustable connection between the gearbox and the remaining framework via bolts  165 . Thus, the connection of the unitary portion  230  to the gearbox  125  is preferably adjustable. It is understood, however, that bores may be substituted for the slots defined in the unitary portion to facilitate the non-adjustable connection of the gearbox to the remaining framework as well. 
     As illustrated in  FIGS. 6 and 7 , the framework  25  further comprises a receiver  265 , defined on the gearbox at a rearward end  270  thereof, to facilitate the connection of the housing  10  and/or at least one extender  70  to the framework (to be further discussed). Although  FIGS. 6 and 7  illustrate the gearbox  125  as having the receiver  265  connected thereto via bolts  165  extending through bores  275  defined in the receiver and engaged with threaded bores  280  defined in the gearbox, it is understood that the receiver may be unitary with the gearbox as well. 
     Although  FIGS. 5-7  each illustrate the components of the framework  25  connected to the housing  10  and to one another, respectively, via a plurality of bolts  165 , it is understood that screws, rivets, or other similar fasteners may be utilized as well. It is also understood that welds or similar bonds may be utilized in place of or in addition to such fasters to connect the components of framework to the housing and to one another as well. Also, although  FIGS. 5 and 6  illustrate the framework  25  as defining the at least rearward ends  110  of two arms  46   a  and  46   b  of the at least one arm  45  connected to the housing  10  and located proximal to the gearbox  125 , it is understood that the at least a rearward end of a single arm  46  of the at least one arm  45  would have a similar relationship with the respective components as well. Furthermore, while  FIG. 7  illustrates a framework  25  defining the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45  along with the unitary portion  230 , it is understood that the at least a forward end of a single arm  46  of the at least one arm  45  may be defined with the unitary portion as well. 
     It is further understood that while  FIG. 7  illustrates the framework  25  defining the unitary portion  230  for use with the scrubber embodiments of  FIGS. 2 and 4 , the framework defining the unitary portion is also suitable for use with the scrubber embodiments of  FIG. 1 and 3  as well. With such embodiments, the unitary portion  230 , defined at the first end  30  of the framework in lieu of the at least rearward arm ends  110 , is adjustably connected to the forward end  15  of the housing  10  of  FIGS. 1 and 3 . For example, the slots  255  defined in the respective upper and lower members  235  and  240  of the unitary portion  230  may be co-aligned with threaded bores (not shown) defined on the respective upper and lower portions  71  and  70  of the housing&#39;s forward end  15 , with the upper and lower portions of the housing  10  located there-between and secured thereto with bolts extending though the slots and into the bores. The connection between the unitary portion  230  of the framework  25  and the housing  10  may be non-adjustable as well by utilizing bores defined in the upper and lower members of the unitary portion that are co-aligned with the bores defined in the upper and lower portions of the housing. In another example, bores (not shown) may be defined in the opposite sides  245  and  250  of the unitary portion  230  to facilitate the respective adjustable connection of the frame&#39;s first end  30  with the slots  155  of the respective sides  80  and  85  of forward end  15  of the lower housing portion  75  of  FIG. 5 , via the bolts  165 . Again, bores may be utilized in place of the slots of the lower housing to facilitate a non-adjustable connection between the components as well. 
     As illustrated by example in  FIGS. 5-7 , the at least a forward end  40  of each arm  46   a  and  46   b  of the at least one arm  45  defines a through, roller assembly bore  285  that accommodates a roller assembly shaft  290  to define the rotatable association of the roller assembly  50  with the at least a forward end of the at least one arm, to be further discussed. The framework  25  of the embodiments illustrated in  FIGS. 5-7  preferably defines a length between its first end  30  and the roller assembly bores  285  defined in the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45  of from about 6 inches to about 12 inches. 
     In the embodiment of  FIG. 5 , the framework  25  preferably defines a length between the first end  30  and the roller assembly bores  285  of about 10 inches. In the embodiments of  FIGS. 6 and 7 , the framework  25  preferably defines a length between the first end  30  and the roller assembly bores  285  of about 8 inches, with the first end of  FIG. 6  defining the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45 . However, it is understood that the foregoing lengths are equally applicable to the framework of  FIG. 7  defining the unitary portion  230  at the first end  30 . To ensure an adequate rigidity of the arm ends of  FIGS. 5-7 , each preferably defines a width of from about 1/16 of an inch to about ⅜ of an inch, and more preferably about ⅛ of an inch. The arm ends of the figures each preferably have a depth between each arm&#39;s upper and lower edges  140  and  145  of from about 1 inch to about 5 inches. However, it is noted that the depth of each arm end (i.e. at least the forward end) is preferably less than the diameter of the at least one roller of the roller assembly (to be further discussed in relation to  FIG. 14 ). 
     Referring again to  FIGS. 5-7 , for embodiments of the extendable scrubber  5  having a framework  25  defining the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45 , the roller assembly  50 , comprised of at least one roller  52  and rotatably associated with the at least forward ends  40  of the arms, is illustrated as preferably comprising a central roller  295  and two outer rollers  300  and  305  of the at least one roller. The central roller  295  is located between the at least forward ends  40  of the arms  46   a  and  46   b  while the two outer rollers  300  and  305  are axially aligned with the central roller and located outwardly of the arm ends. For embodiments of the extendable scrubber  5  having a framework  25  defining the at least a forward end  40  of only a single arm  46  of the at least one arm  45 , the roller assembly  60  is illustrated in  FIGS. 1 and 2  as preferably comprising first and second rollers  310  and  315  of the at least one roller  52  that are axially aligned and located adjacent to opposite sides of the arm end. 
     Although  FIGS. 1 and 2  illustrate the roller assembly  50  as comprising two rollers (i.e. first and second rollers  310  and  315 ) of the at least one roller  52  rotatably associated with the arm  46  of the at least one arm  45 , it is understood that the roller assembly may comprise a single roller of the at least one roller located to one side of the arm. Also, although  FIGS. 3 and 4  illustrate the roller assembly  50  as having three rollers (i.e., the central roller  295  and outer rollers  300  and  305 ) of the at least one roller  52  rotatably associated with the arms  46   a  and  46   b  of the at least one arm  45 , it is understood that the roller assembly may comprise a single roller (i.e. a central roller alone) of the at least one roller located between the arms. 
     Regardless of whether the extendable scrubber utilizes a single arm or a pair of arms, the roller assembly  50  has an overall length of from about 2 inches to about 60 inches, preferably from about 18 inches to about 62 inches. For scrubbers utilizing a single arm, each of the first and second rollers have a length of from about 1 inch to about 30 inches, preferably from about 9 inches to about 31 inches. For scrubbers utilizing a pair of arms, the central roller has a length of from about 2 inches to about 62 inches, preferably about 3 inches, with each outer roller having a length of from about 1 inch to about 29.5 inches. 
       FIGS. 8 and 9  are respective sectional assembly views of the roller assemblies  50  of the extendable scrubbers  5  of  FIGS. 1-4 . As illustrated in  FIG. 8  in relation to extendable scrubbers  5  having a framework  25  defining the at least a forward end  40  of a single arm  46  of the at least one arm  45 , the roller assembly  50  preferably comprises the first and second rollers  310  and  315  of the at least one roller  52  rotatably associated with the at least a forward end of the arm, with each roller defining inner and outer ends  320  and  325 . The inner ends  320  of the respective rollers  310  and  315  are located proximal to the forward end  40  of the arm  46  while the outer ends  325  thereof define opposite outer ends  330   a  and  330   b  of the roller assembly  50 . 
     As illustrated in  FIG. 9  in relation to extendable scrubbers  5  having a framework  25  defining the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45 , the roller assembly  50  preferably comprises the central roller  295  and the outer rollers  300  and  305  of the at least one roller  52  rotatably associated with the at least forward ends of the arms of the scrubber. The central roller  295  defines opposite ends  350  and  355  located proximal to the forward ends  40  of the arms  46   a  and  46   b , with each outer roller  300  and  305  defining inner and outer ends  360  and  365 . The respective inner ends  360  of the outer rollers  300  and  305  are preferably located proximal the forward ends  40  of the arms  46   a  and  46   b  while the respective outer ends  365  of each outer roller define the opposite outer ends  330   a  and  330   b  of the roller assembly  50 . 
     As illustrated respectively in  FIGS. 8 and 9 , for scrubber embodiments defining the at least a forward end or ends  40  of either an arm  46  or arms  46   a  and  46   b  of the at least one arm  45 , the roller assembly shaft  290 , defining an outer surface  370  and opposite ends  375   a  and  375   b , extends through the roller assembly bore  285  defined at the forward end of each arm. The shaft  290  also extends at least into each roller of the at least one roller  52  of the roller assembly  50  to define the rotatable association of the assembly with the at least a forward end  40  of the at least one arm  45  of the respective scrubbers  5 . 
     Thus, for scrubbers  5  utilizing arm  46  of the at least one arm  45 , the shaft  290  extends through the roller assembly bore  285  at the forward end  40  and at least into the first and second rollers  310  and  315  of the roller assembly  50  ( FIG. 8 ). For scrubbers  5  utilizing arms  46   a  and  46   b  of the at least one arm  45 , the shaft  290  extends through the roller assembly bore  285  at each forward end  40 , into and through the central roller  295 , and at least into the outer rollers  300  and  305  of the roller assembly  50  ( FIG. 9 ). In both scrubber embodiments, each roller assembly bore  285  is preferably about 0.505 inches in diameter while the roller assembly shaft  290  preferably defines an outer surface  370  having a corresponding diameter of about 0.5 inches. It is understood, however, that bores and corresponding shafts of other diameters may be utilized as well. 
     For the scrubber embodiments utilizing either an arm  46  or arms  46   a  and  46   b  of the at least one arm  45  respectively illustrated in  FIGS. 8 and 9 , each at least one roller  52  of the roller assembly  50  preferably defines about a 1 and ¼ inch inside diameter and about a 2 inch outside diameter to define inner and outer roller surfaces  380  and  385 , respectively. However, in additional embodiments, each roller may define an outside diameter of between about 1 inch and about 5 inches to define the outer roller surface as well. A circumferal void  390 , defining an inner circumferal surface  395  having a diameter greater than each roller&#39;s inside diameter but less than the outside diameter, is preferably defined in the opposite ends of each roller of the at least one roller  52  of the roller assembly  50 . For the inner and outer ends  320  and  325  of the first and second rollers  310  and  315  ( FIG. 8 ), as well as for the opposite ends  350  and  355  of the central roller  295  and inner and outer ends  360  and  365  of the outer rollers  300  and  305  ( FIG. 9 ), a seat  400  is located in the circumferal void  390  that engages the circumferal surface  395 , with the seat  400  accommodating the placement of at least a thrust bearing and race assembly  405  therein. The seats  400  are preferably comprised of aluminum, with each preferably bonded to the inner circumferal surfaces  395  of the respective rollers with an adhesive. However, it is understood that the seat  400  may be comprised of any lightweight, rigid material as well. It is further understood that the seat may be connected to the respective roller using a resistance fit of any mechanical means understood in the art. Each seat may also be unitary with or defined in each roller itself as well. 
     Each thrust bearing and race assembly  405  has an inner race and offset, outer race to define opposite bearing sides  410  and  415 . Each thrust bearing and race assembly  405 , located between the outer surface  370  of the roller assembly shaft  290  and the respective seat  400  of each roller of the at least one roller  52  of the roller assembly  50 , allows the rollers of the roller assembly to thus rotate about the shaft. Each seat  400  defines an abutment  420  located at a predetermined distance from the end of each roller of the at least one roller  52 . For each roller of the roller assembly  50 , the abutment  420  is adapted for contact with the one side  415  of the thrust bearing and race assembly  405  (i.e., the side of the offset, outer race). 
     Referring respectively to the roller assemblies  50  of  FIGS. 8 and 9 , for the seats  400  located at the inner ends  320  of the first and second rollers  310  and  315  proximal to the sides  127  and  128  of the arm  46 , as well as for those located at the opposite ends  350  and  355  of the central roller  295  and the inner ends  360  of the outer rollers  300  and  305  proximal to the inner and outer sides  130  and  135  of the arms  46   a  and  46   b , respectively, the distance of a given abutment  420  from the ends of the rollers is less than the width of a given thrust bearing and race assembly  405 . This reduced distance allows the other side  410  of the thrust bearing and race assembly  405  i.e. the side not in contact with a roller&#39;s abutment  420 , to contact to the respective sides of the arms, thus precluding any rotational interference between the ends of the rollers with the arms when the roller assembly  50  and shaft  290  are secured to the arms themselves. 
     To secure the roller assembly  50  and shaft  290  to the arm  46  of  FIG. 9  or to the arms  46   a  and  46   b  of  FIG. 4 , the shaft preferably defines threads  425  at its opposite ends  375   a  and  375   b  such that nuts  430  threaded thereto exert lateral forces against the sides of the thrust bearing and race assemblies  405  (via the sides  415  of the offset, outer race) located at the outer ends  325  of the first and second rollers  310  and  315  and at the outer ends  365  of the outer rollers  300  and  305 , respectively. Thus, when the nuts  430  are fastened to the threaded ends of the roller assembly shaft  290  and against the thrust bearing and race assemblies  405  located at the outer ends of the respective roller assemblies, the forces created thereby are transmitted laterally through the rollers and remaining bearing assemblies via the abutments  420 , and to the arm  46  or arms  46   a  and  46   b , to secure each roller of the at least one roller of the assembly thereto while avoiding the occurrence of any rotational interference with adjacent roller ends. 
     While  FIGS. 8 and 9  illustrate that each at least one roller  52  of the roller assembly  50  rotates about the shaft  290  connected to the at least forward ends  40  of the arm  46  or arms  46   a  and  46   b  of the at least one arm  45  of the scrubber via thrust bearing and race assemblies  405  located between the shaft and the respective seats  400  of each roller,  FIGS. 10 and 11  illustrate each at least one roller of the roller assembly affixed to the shaft, with the shaft rotatably connected to the at least forward ends of the arms via one or more bearing and race assemblies located there-between. As illustrated therein, a press-fit bearing and race assembly  435  is located between the shaft  290  and the roller assembly bore  285  defined at the at least forward end  40  of the arm  46  or arms  46   a  and  46   b  of the at least one arm  45  to allow the shaft to rotate in relation thereto. Each at least one roller  52  of the assembly  50  again preferably defines about a 1 and ¼ inch inside diameter and about a 2 inch outside diameter to define inner and outer roller surfaces  380  and  385  respectively. Again however, in additional embodiments, each roller may define an outside diameter of between about 1 inch and about 5 inches to define the outer roller surface as well. A circumferal void  390 , again defining an inner circumferal surface  395  having a diameter greater than each roller&#39;s inside diameter but less than the outside diameter, is again preferably defined at the opposite ends of each roller. 
     However, the circumferal voids  395  defined in at least the inner ends  320  of the respective first and second rollers  310  and  315  ( FIG. 10 ), as well as in the opposite ends  350  and  355  of the central roller  295  and inner ends  360  of the respective outer rollers  300  and  305  ( FIG. 11 ), each preferably accommodate the placement of a roller support  440  therein in lieu of the seat, with each roller support defining a support bore  445  therein adapted for mating engagement with the shaft  290 . A set-screw  450  intersects the support bore  445  of each support  440  for engagement with a respective recess  455  defined on the shaft. Each set-screw  450 , when engaged with an associated recess  455  of the shaft  290 , thus releasably affixes each roller of the at least roller  52  of the roller assembly  50  to the shaft. 
     Because of the presence of the press-fit bearing and race assemblies  246  located between the respective arms and the shaft, the thrust bearing and race assemblies  405  are absent from the seats  400  located at the outer ends  325  of the respective first and second rollers  310  and  315  ( FIG. 10 ) and at the outer ends  365  of the respective outer rollers  300  and  305  ( FIG. 11 ), with the nuts  430  fastened to the threads  425  of the shaft and against the abutments  420  of the seats. Each roller support  440  is preferably comprised of aluminum and preferably bonded to the respective inner circumferal surfaces  395  of each roller with an adhesive. However, it is understood that the support may be comprised of any lightweight material as well. It is further understood that each may be connected to the respective roller using a resistance fit or any mechanical means understood in the art. 
     In addition to having circumferal voids  390  defined in the rollers of the respective roller assemblies  50  to accommodate the respective seats  400  or roller supports  440 , the at least one roller  52  of each assembly defines other features as well to accommodate the operable relation of the scrubber&#39;s at least one drive belt  60  therewith. Referring to  FIG. 12 , the inner ends  320  of the first and second rollers  310  and  315  located proximal to the sides  127  and  128  of the at least a forward end  40  of the arm  46  of the at least one arm  45  each define an inner circumferal inlet  460  in the outer surface  385  of the roller. The inner circumferal inlets  460  of the first and second rollers  310  and  315  together define a groove  465  in the roller assembly  50  for operable engagement with the drive belt  61  of the at least one drive belt  60 . Referring to  FIG. 13 , the opposite ends  350  and  355  of the central roller  295  located proximal to the inner sides  130  of the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45  each thus define an outer circumferal inlet  470  in the outer surface  385  of the roller. The inner ends  360  of the outer rollers  300  and  305  located proximal to the outer sides  135  of the at least forward ends  40  of the arms  46   a  and  46   b  of the at least one arm  45  each define an inner circumferal inlet  475  in the respective outer surfaces  385  of each roller. The outer and inner circumferal inlets  470  and  475  of the respective central  295  and two outer rollers  300  and  305  together define grooves  465   a  and  465   b  in the roller assembly  50  for operable engagement with the drive belts  61   a  and  61   b  of the at least one belt  60 . The groove  465  of  FIG. 12  and the grooves  465   a  and  465   b  of  FIG. 13  thus define the operable relationship of each belt with the roller assembly  50  of each respective scrubber. 
     Each circumferal inlet defines a cross-section and depth such that their combination defines a groove  465  or grooves  465   a  and  465   b  having a cross-section and depth sufficient to accommodate the drive belt  61  or belts  61   a  and  61   b  of the at least one belt  60  therein. In the embodiments illustrated in  FIGS. 12 and 13 , each circumferal inlet preferably defines a downwardly sloped surface to define a groove  465  or grooves  465   a  and  465   b  having a substantially “V” or trapezoidal-shaped cross-section, thus accommodating a belt of like cross-section therein. However, it is understood that the circumferal inlets may define grooves having any cross-sectional shape to accommodate a belt of similar cross-section. For example, if the belt has a square or rectangular cross-section, then each circumferal inlet preferably defines a right angle to define a groove having a substantially square or rectangular cross-section. Similarly, if the belt has a circular cross-section, then each circumferal inlet preferably defines a groove having a cross-section defining a chord or semi-circle. 
     Regardless of the shape of the groove cross-section defined by the circumferal inlets, as illustrated in  FIGS. 12 and 13 , because the groove  465  or grooves  465   a  and  465   b  of a given roller assembly  50  are defined by circumferal inlets located on opposite sides of the at least forward ends  40  of the arm  46  or pair of arms  46   a  and  46   b  of the at least one arm  45 , a gap  480  is defined in each groove due to the presence of the arm end located there-between. Referring to  FIG. 14  in addition to  FIGS. 12 and 13 , the at least a forward end  40  of the at least one arm (only arm  46 , belt  61  and central roller  295  illustrated in  FIG. 14  by example) preferably defines a rounded outer end  478  co-radial with the roller assembly bore  285  defined therein. To ensure that a given drive belt, when engaged with a given groove, does not contact the upper and lower edges  140  and  145  or rounded outer end  478  of a given arm located respectively within a given gap  480 , the depth of each groove (i.e., groove  465 ) is defined by a groove radius GR, as measured from an axis  482  defined by the roller assembly bores  285  of the arm or arms, that exceeds the end radius ER of the arms&#39; rounded ends defining each arm&#39;s top-to-bottom depth. Also, to ensure that the given drive belt engaged with a given arm is not drawn into the respective gap  480  defined therein, each groove defines a width that both accommodates the drive belt and exceeds that of the gap. 
     Alternatively, referring again to  FIG. 10 , the roller supports  440  located at the inner ends  320  of the first and second rollers  310  and  315  of the at least one roller  52  each define a pulley surface  485 . The pulley surfaces  485  of the first and second rollers  310  and  315  together define a pulley  490  in the roller assembly  50  for operable engagement with the drive belt  61  of the at least one drive belt  60 . Referring again to  FIG. 11 , the roller supports  440  located at the opposite ends  350  and  355  of the central roller  295  and at the inner ends  360  of the outer rollers  300  and  305  of the at least one roller  52  each define pulley surface  485  to define respective pulleys  490   a  and  490   b  in the roller assembly  50  for operable engagement with the drive belts  61   a  and  61   b  of the at least one drive belt  60 . While  FIGS. 12 and 13  illustrate a groove defined by inlets located at respective roller ends and while  FIGS. 10 and 11  illustrate a pulley defined by the pulley surfaces of the roller supports located at respective roller ends, it is understood that the groove or pulley may be defined anywhere along the length of the roller as well. 
     Because the pulley  490  or pulleys  490   a  and  490   b  of the rollers of a given roller assembly  50  are defined by pulley surfaces located on opposite sides of the arm  46  or pair of arms  46   a  and  46   b  of the at least one arm  45 , a gap  480  is again defined due to the presence of the arm located there-between. Referring again to  FIG. 14 , to ensure that a drive belt, when engaged with a given pulley, does not contact the upper and lower edges  140  and  145  or rounded forward end  478  of a given arm (only arm  46 , belt  61  and central roller  295  illustrated by example) located respectively within a given gap  480 , each pulley (i.e., pulley  490 ) defines a radius PR, again as measured from an axis  482  defined by the roller assembly bores  285  of the arm or arms, that the exceeds the end radius ER of the arms&#39; rounded ends defining each arm&#39;s top-to-bottom depth. Also, to ensure that the given drive belt engaged with a given arm is not drawn into the respective gap  480  defined therein, each groove defines a width that both accommodates the drive belt and exceeds that of the gap. 
     The roller assembly  50 , driven by the drive belt  61  or drive belts  61   a  and  61   b  of the at least one drive belt  60  to rotate against various insulation mixtures and building framing members, thus utilize rollers comprised of durable materials. In one embodiment, the at least one roller  52  of the roller assembly  50  is comprised of a polyurethane material having a durometer hardness range of between about 60 A and about 85 D, preferably about 75 D. It is understood, however, that polyurethane rollers of other durometer hardness may be utilized, as well as rollers comprised of other materials (i.e., aluminum, plastic, rubber, etc). To facilitate the removal of the excess insulation mixture from building cavities and from the faces of the structural members, the at least one roller  52  of the roller assembly  50  defines a textured outer surface. The textured outer surface may comprise any texture sufficient for the removal of sprayed insulation or other materials. In the embodiments illustrated in  FIGS. 15-17 , the at least one roller  52  of the roller assembly  50  preferably defines a plurality of ribs  495  in its outer surface  385 . The outer surface  385  defines between about 15 and about 35 ribs, preferably about 22 ribs. The ribs  495  may be machined or cut into the outer surface  385  of each roller, or the ribs may be formed by a molding or extrusion process. 
       FIG. 15  illustrates an embodiment of the at least one roller  52  of the roller assembly  50  wherein each rib  495  has a triangular cross-section. As illustrated therein, the triangular cross-section of each rib preferably defines a base  500  having a width of between about ⅛ of an inch and about ½ of an inch, more preferably about 3/16 of an inch, and a height  505  defining a radial distance from the base of between about ⅛ of an inch and about ¼ of an inch, more preferably about 3/16 of an inch. In one embodiment, the base  500  of each rib  495  is longitudinally co-terminus with one another such that no space exists circumferentially there-between. However, it is understood that in other embodiments, the base  500  of each rib  495  is not longitudinally co-terminus with one another such that a longitudinal space is defined there-between. 
       FIG. 16  illustrates an embodiment of the at least one roller  52  of the roller assembly  50  wherein each rib  495  has a cross-section defining at least two right angles. As illustrated therein, the cross-section of each rib  495  preferably defines a base  500  having a width of between about ⅛ of an inch and about ½ of an inch, more preferably about 3/16 of an inch, and a height  505  defining a radial distance from the base of between about ⅛ of an inch and about ¼ of an inch, more preferably about 3/16 of an inch. In one embodiment, the base  500  of each rib  495  is again longitudinally co-terminus with one another such that no space exists circumferentially there-between. However, it is understood that in other embodiments, the base  500  of each rib  495  is not longitudinally co-terminus with one another such that a longitudinal space is defined there-between. 
       FIG. 17  illustrates an embodiment of the at least one roller  52  of the roller assembly  50  wherein each rib  495  has a cross-section defining a blade. As illustrated therein, the cross-section of each rib preferably defines a base  500 . A spacing  510  of between about ⅛ of an inch and about ½ of an inch, more preferably about 3/16 of an inch, is defined between each rib  495  (i.e. blade). The cross-section of each rib also preferably defines a height  505  defining a radial distance from the base of between about ⅛ of an inch and about ¼ of an inch, more preferably about 3/16 of an inch. 
     The motor  55 , preferably connected to the housing  10 , is operably associated with the at least one drive belt  60  (i.e., drive belt  61  or drive belts  61   a  and  61   b ), with such operable association preferably comprising at least one drive pulley  514  (i.e., drive pulley  515  or drive pulleys  515   a  and  515   b , respectively) operably engaging the at least one drive belt and driven by the motor, or driven by the gearbox  125  operably associated with the motor.  FIGS. 18 and 19  illustrate alternate embodiments of the operable association of the motor with the drive belts of the scrubber of  FIG. 3  while  FIG. 20  better illustrates the operable association of the motor and drive belts of the scrubber of  FIG. 4 . While each of the aforementioned figures respectfully illustrate the operable association of the motor and gearbox with the drive belts  61   a  and  61   b  via drive pulleys  515   a  and  515   b , it is understood that a single pulley  515  of that at lest one drive pulley  514  may be utilized to drive a single belt  61  of the at least one drive belt  60  as well (i.e.,  FIGS. 1 and 2 ). 
     In the embodiment of the scrubber  5  illustrated in  FIG. 18 , each at least one drive pulley  514  (i.e., drive pulleys  515   a  and  515   b ) is driven by the motor  55  and is operably engaged with each at least one drive belt  60  (i.e., belts  61   a  and  61   b ) to comprise the operable association of the motor with the at least one drive belt. The motor  55  drives the drive pulleys  515   a  and  515   b  of the at least one drive pulley  514  such that a double-ended output shaft  520  of the motor defining ends  525   a  and  525   b  has a pulley connected at each end. With this configuration, the motor  55  is preferably connected to the lower portion  75  of the housing  10  with screws, bolt or other common fasteners, preferably proximal to a forward end  15  thereof, with the output shaft  520  oriented transverse to the at least forward ends  40  of the arms  46   a  and  46   b  of the framework  25 . The output shaft preferably has a shaft length such that the drive pulleys  515   a  and  515   b  of the at least one drive pulley  514  are located proximal to the first end  30  of the framework  25  (i.e. the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45 ) along an axis  530  defined through the at least a forward end  40  of each arm. 
     For scrubber embodiments utilizing a framework  25  defining a unitary portion  230  at its first end  30 , the pulleys  515   a  and  515   b  of the at least one drive pulley  514  are located respectively proximal to the sides  245  and  250  of the unitary portion (see  FIG. 7 ). In a variation of the embodiment of  FIG. 18  (not shown), the motor  55  is located proximal to the forward end  40  of the at least one arm  45  and again utilizes a double-ended output shaft  520  defining ends  525   a  and  525   b  and oriented transverse to the end of the at least one arm. A roller of the roller assembly  50  (i.e. first and second rollers  310  and  315 ) is connected to each of the opposite shaft ends and is thus directly rotated by the motor. 
     In another embodiment of the scrubber  5  illustrated by example in  FIG. 19 , the at least one drive pulley  514  (i.e., drive pulleys  515   a  and  515   b ), is driven by a gearbox  125  connected to the housing  10  and operably associated with the motor  55 , with each at least one drive pulley again operably engaged with each at least one drive belt  60  (i.e. belts  61   a  and  61   b ) to comprise the operable association of the motor with the at least one drive belt. With this configuration, the motor  55  is preferably connected to the lower portion  75  of the housing  10 , with the motor&#39;s output shaft  550  preferably oriented parallel to the at least forward ends  40  of the arms  46   a  and  46   b  and driving the gearbox  125 . The gearbox  125 , preferably connected to the lower portion  75  of the housing  10  with screws, bolts or other common fasteners preferably proximal to the forward end  15  thereof, is a 90 degree gearbox preferably having a double-ended gearbox output shaft  540  oriented transverse to the arms and defining ends  545   a  and  545   b.    
     The gearbox output shaft  540  has drive pulleys  515   a  and  515   b  of the at least one drive pulley  514  connected at its respective ends  545   a  and  545   b  and has a length such that the pulleys are again located proximal to the first end  30  of the framework  25  (i.e. the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45 ) along an axis  530  defined through the at least a forward end  40  of each arm. For scrubber embodiments utilizing a framework  25  defining a unitary portion  230  at its first end  30 , the pulleys  515   a  and  515   b  or the at least one pulley  514  are located respectively proximal to the sides  245  and  250  of the unitary portion (see  FIG. 7 ). Referring again to  FIG. 19 , the motor output shaft  550  of the motor  55  preferably drives the gearbox  125  via a drive link  555  located between the output shaft of the motor and the input shaft  560  of the gearbox. In one embodiment, the drive link  555  of the embodiment of  FIG. 19  comprises a flexible coupling defining opposite ends  565  and  570 . An inlet  575  is defined in each opposite end, with the inlets adapted to accept an insertion of the motor output shaft  550  and gearbox input shaft  560  respectively therein. A set-screw or similar fastener (not shown) is preferably utilized with each end of the drive link  55  to secure the respective ends  565  and  570  to the motor and gearbox shafts  550  and  560 . 
     In the embodiment of the scrubber  5  illustrated in  FIG. 20 , the gearbox  125  of the framework  25 , operably associated with the motor  55 , drives the at least one drive pulley  514  (i.e., drive pulleys  515   a  and  515   b ), with each at least one drive pulley again operably engaged with each at least one drive belt  60  (i.e., belts  61   a  and  61   b ) to comprise the operable association of the motor with the at least one drive belt. As illustrated therein, the motor  55  is preferably connected at the rearward end  20  of the housing  10  with the output shaft  550  of the motor oriented parallel to the at least forward ends  40  of the arms  46   a  and  46   b . The gearbox  125  of the framework  25 , with the at least rearward ends  110  of arms  46   a  and  46   b  located proximal thereto, is preferably connected at the forward end  15  of the housing  10 ,(or optionally the at least one extender  70  of  FIG. 24 , to be further discussed). The gearbox  125  again is a  90  degree gearbox preferably having a double-ended gearbox output shaft  540  oriented transverse to the arm ends and defining ends  545   a  and  545   b.    
     The gearbox output shaft  540  again has drive pulleys  515   a  and  515   b  of the at least one drive pulley  514  connected at its respective ends  545   a  and  545   b  and has a length such that the pulleys are again located proximal to the first end  30  of the framework  25  (i.e. the at least rearward ends  110  of the arms  46   a  and  46   b  of the at least one arm  45 ) along an axis  530  defined through the at least a forward end of each arm. For scrubber embodiments utilizing a framework  25  defining a unitary portion  230  at its first end  30 , the pulleys  515   a  and  515   b  of the at least one drive pulley  514  are located respectively proximal to the sides  245  and  250  of the unitary portion (see  FIG. 7 ). Also, regardless of scrubber embodiment, the drive pulleys  515 ,  515   a  and  515   b  of the at least one drive pulley  514  preferably define a pulley groove radius PR (i.e. the radius of the pulley groove as measured from an axis  532  defined by the motor or gearbox output shaft  520  or  540 ) that exceeds the end radius of the rounded outer end  478  of each arm and thus the top-to-bottom depth of each to accommodate each respective belt therein while preventing an interference of each belt with the framework  25  (see FIGS.  14  and  18 - 20 ). 
     In a variation of the embodiment of  FIG. 20  (not shown), the gearbox  125  is located proximal to the forward end  40  of the at least one arm  45  (at the second end  35  of the framework  25 ) and again is a 90-degree gearbox having a double-ended gearbox output shaft  540  oriented transverse to the end of the at least one arm. A roller of the roller assembly  50  (i.e. first and second rollers  310  and  315 ) is connected to each of the opposite shaft ends  545   a  and  545   b  and is thus directly rotated by the gearbox without the use of the at least one drive belt  60 . The gearbox is driven by a motor connected to the housing via a shaft connected there-between. 
     As illustrated in  FIG. 20 , the housing  10  operably associates the gearbox  125  with the motor  55  wherein the housing preferably comprises the housing ferrule member  115  enclosing a housing drive link  580  (housing ferrule member shown removed from housing drive link to better illustrate the drive link). The output shaft  550  of the motor  55  preferably drives the gearbox  125  via the housing drive link  580  enclosed by the ferrule member  115  of the housing  10 . The housing drive link  580  defines forward and rearward ends  585  and  590  and an outer cylindrical surface  595 , with the rearward end of the link connected to the output shaft  550  of the motor  55  and the forward end of the link removably connected to an input shaft  560  of the gearbox  125 . The ferrule member  115  of the housing and the housing drive link  580  located therein preferably have about a common length between their respective forward and rearward ends. In one embodiment, the housing  10 , comprising the ferrule member  115  enclosing the housing drive link  580 , has a length of from about 3 inches to about 60 inches, preferably from about 6 inches to about 24 inches, and more preferably about 24 inches. Thus, given that the housing ferrule member  115  and the housing drive link  580  have about common lengths, the housing ferrule member  115  and housing drive link  580  each have a length of from about 3 inches to about 60 inches, preferably from about 6 inches to about 24 inches, and more preferably about 24 inches. 
     To concentrically secure the housing drive link  580  within the ferrule member  115  of the housing  10 , a plurality of spacers  600  are located along the drive link. Each spacer preferably comprises a ferrule bushing defining inner and outer cylindrical surfaces  605  and  610 . The inner cylindrical surface  605  of each spacer  600  defines a diameter slightly greater than the diameter defined by the outer cylindrical surface  595  of the housing drive link  580  while the outer cylindrical surface  610  of each spacer defines a diameter slightly greater that the inside diameter defined by the inner cylindrical surface  120  of the housing ferrule member  115 . The relationship between the respective diameters allows the housing drive link to rotate freely within each spacer  600  while each spacer is secured via a resistance fit within the housing ferrule member, thus concentrically securing the housing drive link within the housing. 
     In one embodiment, to facilitate the removable connection of at least the forward end  585  of the housing drive link  580  to the input shaft  560  of the gearbox  125 , a coupling  615  is preferably located on the gearbox input shaft with the coupling preferably defining an inlet  620  adapted to accept both the gearbox input shaft and the forward end  585  of the housing drive link  580  therein. A threaded bore  625  is defined in the coupling  615  that is adapted to accept a hex screw  630  or similar fastener therein for tightening against the gearbox input shaft  560  inserted therein. The forward end  585  of the housing drive link  580  and the inlet  620  of the coupling  615  receiving it both preferably define a square or hexagonal shape adapted for mating engagement with one another to rotationally secure the drive link to the gearbox input shaft  560  via the coupling while allowing for a ready withdrawal of the drive link from within the coupling. The coupling  615  is also preferably located on the motor output shaft  550  with the coupling again preferably defining an inlet  620  adapted to accept both the motor output shaft and the rearward end  590  of the housing drive link  580  therein. Threaded bores  625  are defined in the coupling  615  that are adapted to accept hex screws  630  or similar fasteners therein for tightening against both the motor output shaft  550  and rearward link end  590  inserted therein to prevent their withdrawal from one another. 
     To facilitate the removable connection of at least the forward end  15  of the housing  10  to the gearbox  125  of framework  25 , the receiver  265  of the gearbox, defined at the rearward end  270  thereof, is adapted to accept a removable insertion of the forward end  15  of the housing ferrule member  115  therein. The receiver  265  defines a transverse bore  635  therein adapted for engagement with a snap-pin  640  attached to the forward end  15  of the housing ferrule member  115  to removably secure at least the housing to the gearbox  125  of the framework  25 . Thus, as illustrated therein, the removable connection of both the forward end  585  of the housing drive link  580  to the input shaft  560  of the gearbox  125 , and the forward end  15  of the housing  10  to the gearbox itself, facilitates a removal of the framework  25  from the housing to allow for the optional utilization of the at least one extender  70 , to be further discussed, between the housing and framework. However, it is understood that further embodiments of the scrubber of  FIG. 20  may have a connection between the housing and framework that does not facilitate their removal from one another as well. Also, although  FIG. 20  illustrates the gearbox  125  as having the receiver  265  connected to the rearward end  270  of the gearbox  76  via bolts  165  threadedly engaged with bores  280  defined in the gearbox through co-aligned bores  275  defined in the receiver, it is understood that the receiver may be unitary with the gearbox as well. 
     It is noted that in each of the embodiments illustrated in  FIGS. 19 and 20 , a 1:1 gear ratio is preferred for the gearbox. However, it is understood that gearboxes having other gear ratios may be utilized as well, depending upon the desired rotational rate of the roller assembly. Also, although a rigid shaft is preferably utilized for the drive link and housing drive link that respectively connect the motor to the gearbox, it is understood that a flexible shaft or other mechanism understood in the art, may be utilized as well. Furthermore, regardless of the scrubber embodiment, the motor  55  is preferably mounted to the housing  10  using common fasteners such as screws or bolts. 
     Also regardless of embodiment, the motor  55  preferably comprises a small-profile, high-torque and high-RPM (rotation per minute) motor preferably having an adjustable RPM and torque. In the one embodiment, the motor has a rotational rate of from about 500 RPMs to about 2000 RPMs, preferably about 1000 RPMs, and delivers from about 30 in-lbs of torque to about 50 in-lbs of torque, preferably about 31.5 in-lbs of torque. Because a 1:1 gear ratio is preferably utilized in the gearbox  125 , these same rotational speeds and torques are transmitted to the rotating roller assembly  50  itself. However, it is understood that both the motor and gearbox output speeds and torques may be varied to achieve these same preferred speeds and torques at the roller assembly. It is also understood that various gear ratios other than 1:1 may be utilized in the gearbox to vary both the rotational speed and torque of the roller assembly as well. Controls for the motor, to include an on-off switch  645  and RPM and torque adjustment dials  650  and  655 , are preferably located on the housing  10  ( FIGS. 18 and 19 ) or the motor  55  ( FIG. 20 ) of the scrubber  5  for ready access during scrubbing operations. A common  120  V electrical cord with plug  660  is connected to the motor  55  to facilitate its energization via any common  120  V electrical outlet or other source. 
     Referring again to the embodiment of  FIGS. 1 and 3 , to facilitate the scrubbing of insulation from areas of extended elevation, the scrubber  5  has an adjustable handle assembly  65  connected to the housing  10 . The adjustable handle assembly  65  preferably comprises a receiver  665  connected to the housing  10  and an extension  670  and a support handle  675  adjustably connected with the receiver. The extension  670  preferably defines an extension handle  680 , with the support handle  675  adjustably connected with the receiver  665  forward of the extension handle when the extension is adjustably connected with the receiver. The components of the adjustable handle may be comprised of aluminum, ferrous or non-ferrous metals or other alloys, plastic, composite materials or other materials having lightweight and rigid properties. The receiver  665  is preferably connected to the housing  10  using common fasters, such as nuts and bolts, screws, rivets, or other similar fasters. However, the receiver may be connected to the housing using welds, adhesive or other similar bonds as well. 
     The adjustable connection of the extension  670  with the receiver  665  (as illustrated in the embodiments of  FIGS. 21-23 ) preferably comprises a mating engagement of at least a forward end  685  of the extension with the receiver, and an extension fixator  690  for releasably connecting the extension along the receiver. The adjustable connection of the support handle  675  with the receiver  665  preferably comprises a support handle fixator  695  for releasably connecting the support handle along the receiver. In the embodiment illustrated in  FIG. 21 , the receiver  665  defines a plurality voids  700  and the extension fixator  690  comprises a snap-pin  705  attached preferably to the forward end  685  of the extension  670  and adapted for selective engagement with the plurality of voids defined in the receiver. Within the same embodiment of  FIG. 21 , the support handle fixator  695  comprises a clamp  710  defined on the support handle  675  and adapted for engagement about the receiver  665 . Although  FIG. 21  illustrates the extension fixator  690  as comprising a snap-pin  705 , with the support handle fixator  695  comprising a clamp  710 , it is understood that other embodiments of each fixator may be utilized as well. 
     For example, in other embodiments, the extension fixator  690  and the support handle fixator  695  comprise a common fixator  715 . In one embodiment utilizing a common fixator  715 , illustrated in  FIG. 22 , the support handle  675  defines a sleeve  720  having a bore  725  there-through, and the receiver  665  and extension  670  each define a plurality through holes  730 . The holes  730  defined in the receiver  665  and the extension  670  are adapted for selective alignment with one another and with the bore  725  of the sleeve. The common fixator  715  in the embodiment of  FIG. 22  comprises a pin  735  adapted for insertion through the bore  725  of the sleeve  720  and through the aligned holes  730  of the receiver  665  and the extension  670 . In a variation of this embodiment illustrated in  FIG. 22 , a set-screw  740  may be utilized in place of the pin  735  and a threaded bore  745  defined in the sleeve  720  of the support handle  675  in place of the bore  725 , with the set-screw adapted for threaded engagement with the threaded bore of the sleeve and further adapted for engagement with the aligned holes  730  of the receiver  665  and the extension  670 . 
     In another embodiment utilizing a common fixator  715  illustrated in  FIG. 23 , the support handle  675  defines a tensioner bore  750  there-through and the receiver  665  and extension  670  each define an elongated slot  755 , with the elongated slots of the receiver and the extension adapted for selective alignment with one another and with the bore of the support handle. The common fixator  715  illustrated in  FIG. 23  comprises a tensioner  760 , adapted for insertion through the tensioner bore  750  of the support handle  675  and through the elongated slots  755  of the receiver  665  and the extension  670 , which is tightened to adjustably connect the support handle and extension along the receiver. 
     In the embodiment illustrated in  FIG. 23 , the tensioner  760  preferably comprises a stop  765 , adapted for adjustable abutment with an inner surface  770  of the extension  670 , and a threaded portion  775  extending there-from and through both the extension and receiver slots  755  and the tensioner bore of the support handle for threaded engagement with a common wing-nut  780 . A tightening or loosening of the wing-nut  780  facilitates the adjustable connection of the support and extension handles  775  and  780  with the receiver  665 . With such a tightening or loosening of the wing-nut  780 , the threaded portion  775  of the tensioner  760 , extending through the tensioner bore  750  of the support handle  675  and through the respective selectively-aligned slots  755  of the extension and receiver  670  and  665 , respectively brings the stop  765  into abutment with the inner surface  770  of the extension or releases the abutment off the stop therefrom. Regardless of the support handle and extension fixator utilized, the extension  670  is preferably adjustably connected with the receiver  665  through a range of from about 0 inches to about 15 inches along the receiver. The support handle  675  is preferably adjustably connected with the receiver  665  through a range of from about  0  inches to about 17 inches along the receiver. 
     Referring to  FIGS. 24 and 25  with regard to the embodiment of  FIGS. 2 and 4 , to facilitate the scrubbing of insulation from areas of extended elevation, the scrubber  5  further comprises at least one extender  70  optionally removably connectable between the housing  10  and gearbox  125  of the framework  25 , with the at least one extender operably associating the at least one drive belt  60  with the motor  55  when connected there-between. The at least one extender  70  has forward and rearward ends  795  and  800  and comprises an extender ferrule member  785  enclosing an extender drive link  790 . The extender ferrule member has ends defined by the forward and rearward ends  795  and  800  of the extender, and an inner cylindrical surface  805 . The extender drive link defines forward and rearward ends  810  and  815  and an outer cylindrical surface  820 . The extender ferrule member  785  and extender drive link  790  of the at least one extender  70  preferably have about a common length between their respective forward and rearward ends. In one embodiment, the at least one extender  70 , comprising the extender ferrule member  785  enclosing the extender drive link, has a length of from about 12 inches to about 60 inches, more preferably about 24 inches. Thus, given that the extender ferrule member  786  and the extender drive link  790  have about common lengths, the extender ferrule member  785  and extender drive link  790  each have a length of from about 12 inches to about 60 inches, more preferably about 24 inches. 
     Referring to  FIG. 25 , to concentrically secure the extender drive link  790  within the extender ferrule member  785  of the extender  70 , a plurality of the spacers  600  is located along the extender drive link. Each spacer again preferably comprises a ferrule bushing defining inner and outer cylindrical surfaces  605  and  610 . The inner cylindrical surface  605  of each spacer  600  defines a diameter slightly greater than the diameter defined by the outer cylindrical surface  820  of the extender drive link  790  while the outer cylindrical surface  610  of each spacer defines a diameter slightly greater that the inside diameter defined by the inner cylindrical surface  805  of the extender ferrule member  785 . The relationship between the respective diameters allows the extender drive link to rotate freely within each spacer while each spacer is secured via a resistance fit within the ferrule member, thus concentrically securing the extender drive link within the extender. 
     As illustrated in  FIGS. 24 and 25 , to facilitate the removable connection of at least the forward end of the at least one extender  70  to the gearbox  125  of the framework  25 , the forward end  795  of the extender ferrule member  785  is adapted for removable insertion into at least the receiver  265  of the gearbox  125  and includes an extender snap pin  825  for engagement with the transverse bore  635  of the receiver to removably secure the extender to the gearbox. The forward end  810  of the extender drive link  790  is preferably square or hexagon-shaped and thus adapted for removable insertion into at least the like-shaped inlet  620  of the coupling  615  of the gearbox input shaft  560  ( FIG. 20 ). 
     The rearward end  800  of the at least one extender  70  defines an extender receiver  830  adapted to accept a removable insertion of at least the forward end  15  of the housing ferrule member  115  therein. The extender receiver  830  defines a transverse bore  835  therein adapted for engagement with at least the snap-pin  640  attached to the forward end  15  of the housing ferrule member  115  to removably secure the extender to the housing. The rearward end  815  of the extender drive link  790  preferably has an extender coupling  840  located thereon, with the coupling preferably defining an inlet  845  adapted to accept at least the forward end  585  of the housing drive link  580  ( FIG. 20 ) therein. A threaded bore  850  is defined in the coupling  840  that is adapted to accept a hex screw  630  or similar fastener therein for tightening against the extender link rearward end  815  inserted therein. The forward end  585  of the housing drive link  580  ( FIG. 20 ) and the inlet  845  of the extender coupling  840  receiving it both preferably defines a square or hexagonal shape adapted for mating engagement with one another to rotationally secure at least the housing drive link to the extender link  790  via the coupling while allowing for a ready withdrawal of the drive link from within the coupling. 
     The forward end  15  of the housing  10  is thus removably connectable with either the gearbox  125  of the framework  25  or the rearward end  800  of the at least one extender  70  while the forward end  585  of the housing drive link  580  is thus removably connectable with either the gearbox input shaft  560  or the rearward end  815  of the extender drive link  790 . The forward ends  795  and  810  of the at least one extender  70  and extender drive link  790 , in turn, are thus respectively removably connectable with at least the gearbox  125  and gearbox input shaft  560 . 
     Although  FIG. 24  illustrates only one extender  70  of the at least one extender utilized between the housing  10  and the gearbox  125  of the framework  25 , it is understood that that the at least one extender may comprise any number of extenders, from one extender to a plurality of extenders. Thus, to facilitate the use of a plurality of extenders  70 , it is understood that the respective forward ends  795  and  810  of each extender ferrule member  785  and extender drive link  790 , in addition to being adapted for removable insertion into the respective gearbox receiver  265  of the framework  25  and gearbox input shaft coupling  615 , are also adapted for respective removable insertion into the respective rearward ends  800  and  815  of another extender and extender drive link of the plurality. Thus, the forward ends  795  and  810  each extender  70  and each extender drive link  790  are respectively removably connectable with either the gearbox  125  and gearbox input shaft  560  or the rearward ends  800  and  815  of another extender and extender drive link of the plurality. 
     It thus follows that the extender receiver  830  and coupling  840  located at the respective rearward ends  800  and  815  of each extender  70  and extender drive link  790 , in addition to being adapted to accept the respective removable insertion of the forward ends  15  and  580  of the housing ferrule member and drive link therein, are also adapted to accept the respective removable insertion of the forward ends  795  and  810  of an extender ferrule member and drive link of another extender therein as well. The transverse bore  835  of the extender receiver  830  is adapted for engagement with at least the snap-pin  825  attached to the forward end  795  of the extender ferrule member  785  to removably secure the extenders to one another. The inlet  845  of the extender coupling  840  located at the rearward end  815  of the extender drive link  790  is adapted to accept the forward end  810  of the extender drive link therein (i.e. defines a square or hexagonal shape) to rotationally secure the extender drive links to one another while also allowing for their ready withdrawal from one another. 
     Thus, wherein the at least one extender  70  comprises a plurality of extenders, each extender is adapted for a removable connection between the housing  10  and the framework  25 , between another extender and the framework, between another extender and the housing, or between other extenders of the plurality. Each extender  70  operably associates the at least one drive belt  60  with the motor  55  when connected between the housing  10  and the framework  25 , between another extender and the framework, between another extender and the housing, or between other extenders of the plurality. Such an arrangement thus allows for the utilization of any number of extenders  70  in end-to-end relation between the scrubber&#39;s housing  10  and gearbox  125  of the framework  25 . However, it is understood that no extender  70  may be used between the framework  25  and the housing  10  as well and that the framework and housing may not have a removable connection there-between to facilitate the use of an extender. 
     Referring again to  FIG. 20 , an adjustable handle assembly  65  may be connected to the housing  10  of the scrubber  5  of  FIGS. 2 ,  4  and  20 , preferably comprising a support handle  675  defining a clamp  710  adapted for adjustable engagement about the ferrule member  115  of the housing, and a grip  855  defined at the rearward end  20  of the housing. 
     In use, in the scrubber embodiments of  FIGS. 1 ,  3 ,  18  and  19 , the scrubber is grasped by the support handle and extension handle of the adjustable handle assembly. The motor is thereafter energized by turning on the power switch located on the housing of the scrubber. If desired, the RPM and torque selector dials located on the housing of the scrubber are rotated accordingly to control the motor&#39;s torque and rotational rate. The motor, operably associated with the drive belts of the at least one drive belt via the pulleys of the at least one pulley, drives the belts which, in turn, are operably associated with the roller assembly. 
     The drive belts, in some embodiments entrained around the at least forward ends of the arms of the at least one arm, operably engage the grooves defined in the roller assembly and thus drive the roller assembly to rotate. The rotating roller assembly is then brought into contact with the faces of the framing members of a building cavity. The rotating roller assembly is then pulled along the framing members, preferably in a direction about parallel thereto, such that the ribs of the roller assembly contact and scrub the excess or overfill insulation mixture from the cavity and framing members. 
     To reach areas of extended elevation, the adjustable handle assembly is adjusted to move the extension and support handles further rearward of the roller assembly. In moving the handles, the motor is first preferably de-energized by turning off the power switch located on the scrubber&#39;s housing. If using an embodiment with an adjustable handle assembly having separate extension handle and support handle fixators ( FIG. 21 ), the snap-pin located at the forward end of the extension is depressed out of engagement with the respective void. The extension handle is grasped and the handle pulled in a rearward direction along the receiver by a desired distance. Upon reaching a desired location along the receiver rearward of the previous location, the snap-pin is thereafter allowed to engage a desired void located rearward of the previously-engaged void. The clamp of the support handle is loosened from around the receiver and the support handle is thereafter moved in a reawardly direction along the receiver by a desired distance. Upon reaching a desired location along the receiver rearward of the previous location, the clamp of the support handle is again tightened around the receiver. 
     The scrubber is again grasped by the support handle and extension handle and the motor is again energized through the operation of the power switch located on the scrubber&#39;s housing. The rotating roller assembly, now located in an increased forward position from the support and extension handles and thus increasing the reach of the scrubber, is thereafter brought into contact with the faces of the framing members of a building cavity located in an area of extended elevation. The rotating roller assembly is then again pulled along the framing members in the area of extended elevation to contact and scrub the excess or overfill insulation mixture from the cavity and framing members. 
     If moving the handles further rearward of the roller assembly with embodiments having extension and support handle fixators comprising a common fixator ( FIG. 22 ), the pin is removed from its insertion within the bore of the support handle sleeve and from within the selectively aligned holes of the extension and receiver. If a set-screw is used in place of the pin as the common fixator, the set-screw is removed from threaded engagement with a threaded bore of the support handle sleeve and out of engagement from the selectively aligned holes. The extension handle is again grasped and the handle is pulled in a rearward direction along the receiver by a desired distance. The support handle is also moved in a rearward direction along the receiver by a desired distance. Upon reaching a desired location of the extension and support handles along the receiver rearward of their previous locations, the pin is inserted within the bore of the support handle sleeve and through the selectively aligned holes located rearward of the previous holes. If using a set-screw, the set-screw is threadedly engaged with the threaded bore of the support handle sleeve and into engagement with the selectively aligned holes. 
     In another embodiment having the extension and support handle fixators comprising a common fixator ( FIG. 23 ), the wing-nut of the tensioner is loosened such that threaded portion of the tensioner, extending through the tensioner bore of the support handle and through the respective selectively-aligned slots of the extension and receiver, releases the stop of the tensioner from abutment with the inner surface of the extension. The extension handle is grasped and the handle is pulled in a rearward direction along the receiver by a desired distance. The support handle is also moved in a rearward direction along the receiver by a desired distance. Upon reaching a desired location of the extension and support handles along the receiver rearward of their previous locations, the wing-nut of the tensioner is again tightened such that threaded portion of the tensioner, extending through the tensioner bore of the support handle and through the respective selectively-aligned slots of the extension and receiver, brings the stop of the tensioner into abutment with the inner surface of the extension. Regardless of the embodiment of the adjustable handle assembly utilized on the scrubber, a reversal of the foregoing operations may be executed to move the extension and support handles in a forward direction to decrease the forward position of the roller assembly in relation to the handles, thus decreasing the reach of the scrubber. 
     In use in the scrubber embodiment of  FIGS. 2 ,  4 ,  20  and  24 , the scrubber is grasped by the support handle and grip of the handle assembly. The motor is thereafter energized by turning on the power switch located on the motor. If desired, the RPM and torque selector dials located on motor are rotated accordingly to control the motor&#39;s torque and rotational rate. The motor, operably associated with the drive belts of the at least one drive belt via the pulleys of the at least one pulley, drives the belts which, in turn, are operably associated with the roller assembly. 
     The drive belts, in some embodiments entrained around the at least forward ends of the arms of the at least one arm, operably engage the grooves defined in the roller assembly and thus drive the roller assembly to rotate. The rotating roller assembly is then brought into contact with the faces of the framing members of a building cavity. The rotating roller assembly is then pulled along the framing members, preferably in a direction about parallel thereto, such that the ribs of the roller assembly contact and scrub the excess or overfill insulation mixture from the cavity and framing members. 
     To reach areas of extended elevation, the framework is removed from the forward end of the housing and at least one extender is connected between the housing and framework, with the extender operably associating the at least one drive belt with the motor. In connecting the at least one extender between the housing and the framework, the motor is first preferably de-energized by turning off the power switch located thereon. The snap pin located at the forward end of the housing is depressed and withdrawn from within the receiver of the gearbox to disconnect the housing from the framework. When withdrawing the forward end of the housing from the receiver, the forward end of the housing drive link is also withdrawn from the inlet of the coupling located on the gearbox input shaft. 
     The forward end of the housing is thereafter inserted into the receiver of the at least one extender, with the snap pin located on the housing&#39;s forward end engaging the bore of the receiver to removably secure the housing to the extender. During the engagement of the forward end of the housing into the extender&#39;s receiver, the forward end of the housing drive link is inserted into the inlet of the coupling located on the rearward end of the extender drive link. The forward end of the at least one extender is thereafter inserted into the receiver of the gearbox, with the snap pin located on the extender&#39;s forward end engaging the bore of the receiver to removably secure the extender to the framework. When inserting the forward end of the at least one extender into the gearbox receiver, the forward end of the extender drive link is inserted into the inlet of the coupling located on the input shaft of the gearbox. 
     If desired, a plurality of extenders may be utilized in end-to-end relation such that additional extenders are located between the housing and another extender, between the framework and another extender, or between other extenders of the plurality. When connecting one extender to another extender, the forward end of one extender is inserted into the receiver of another extender, with the snap pin located on the one extender&#39;s forward end engaging the bore of the receiver of the other extender to removably secure the extenders to one another. During the engagement of the forward end of the one extender into the other extender&#39;s receiver, the forward end of the one extenders drive link is inserted into the inlet of the coupling located on the rearward end of the other extender&#39;s drive link. 
     Regardless of extender configuration, the scrubber is again grasped by the support handle and grip and the motor is again energized through the operation of the power switch located thereon. The rotating roller assembly, now located in an increased forward position from the housing and thus increasing the reach of the scrubber, is thereafter brought into contact with the faces of the framing members of a building cavity located in an area of extended elevation. The rotating roller assembly is then again pulled along the framing members in the area of extended elevation to contact and scrub the excess or overfill insulation mixture from the cavity and framing members. 
     While this foregoing description and accompanying drawings are illustrative, other variations in structure and method are possible without departing from the spirit and scope.