Abstract:
A hand carried, manually operated apparatus for cleaning flooring, carpet, upholstery, and the like includes a cleansing fluid chamber, a waste fluid chamber, a pump and an applicator. A first fluid passageway connects the pump and cleansing fluid chamber, a second passageway connects the cleansing fluid chamber and applicator, a third passageway connects the applicator and waste fluid chamber, and a fourth passageway connects the waste fluid chamber and pump. A first one-way valve permits flow from the pump to the cleansing fluid chamber but inhibits reverse flow; and a second one-way valve permits flow from the applicator to the waste fluid chamber but inhibits reverse flow. Air is transferred through the pump from the waste fluid chamber to the cleansing fluid chamber as cleansing fluid is transferred to the applicator from the cleansing fluid chamber and waste fluid is transferred from the applicator to the waste fluid chamber.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is a nonprovisional patent application of, and claims priority under 35 U.S.C. §119(e) to, U.S. provisional patent application Ser. No. 61/596,218, filed Feb. 7, 2012, which &#39;218 application is incorporated herein by reference. Furthermore, the appendix hereto includes the disclosure of the &#39;218 application, which disclosure of the appendix is incorporated by reference herein. 
    
    
     COPYRIGHT STATEMENT 
     All of the material in this patent document is subject to copyright protection under the copyright laws of the United States and other countries. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in official governmental records but, otherwise, all other copyright rights whatsoever are reserved. 
     BACKGROUND 
     The present invention generally relates to systems, methods and apparatus for removing stains and spills from carpet, upholstery and the like, although some aspects and features of the present invention are not limited to use in such fields and will find broader application, as will be apparent from the following disclosure. 
     Electric carpet cleaning machines, including shampooing machines and carpet steamers, are well known. However, such machines can be heavy and cumbersome to move and manipulate. Such machines are also inconvenient to use when a small spill or stain needs to be lifted or cleaned, as opposed to cleaning a room or larger area. Handheld electric or battery operated devices are also known, which include scrubbers and sprayers as well as suctioning for cleaning and lifting spills and stains. Nonetheless, it is believed that there is room for improvement over such devices and machines. One or more aspects or features of the invention are intended to address such need. 
     SUMMARY 
     The present invention generally relates to systems, methods and apparatus for removing stains and spills from carpet, upholstery and the like, although some aspects and features of the present invention are not limited to use in such fields and will find broader application, as will be apparent from the following disclosure. Indeed, while the present invention is described in detail with regard to the cleaning of spots and spills on a carpet, the present invention is also applicable to the cleaning of other types of flooring as well as upholster, furniture, and the like, as will be apparent to the Ordinary Artisan. 
     Accordingly, in an aspect, an apparatus for cleaning an area comprises: a pump; a cleansing fluid chamber, wherein a first fluid passageway connects the pump and the cleansing fluid chamber; an applicator, wherein a second fluid passageway connects the cleansing fluid chamber and the applicator; a waste fluid chamber, wherein a third fluid passageway connects the applicator and the waste fluid chamber and a fourth fluid passageway connects the waste fluid chamber and the pump; a first one-way valve configured to permit flow through the first fluid passageway in a flow direction from the pump to the cleansing fluid chamber but inhibit flow through the first fluid passageway in a flow direction from the cleaning fluid chamber to the pump; and a second one-way valve configured to permit flow through the third fluid passageway in a flow direction from the applicator to the waste fluid chamber but inhibit flow through the first fluid passageway in a flow direction from the waste fluid chamber to the applicator. 
     In a feature, the apparatus further includes a cleansing fluid in the cleansing fluid chamber and air in the waste fluid chamber, and wherein the apparatus is configured such that air is transferred through the pump from the waste fluid chamber to the cleansing fluid chamber as cleansing fluid is transferred to the applicator from the cleansing fluid chamber and waste fluid is transferred from the applicator to the waste fluid chamber. The standing pipes may be disposed in parallel relation to each other and to the cylinder in which the piston moves. 
     In a feature, the pump is manually operated. 
     In a feature, the pump comprises a handle, piston and cylinder, and the pump is manually operated by gripping the handle and moving the piston repeatedly back and forth within the cylinder. 
     In a feature, movement of the piston within the cylinder results in the pumping of air into the cleansing fluid chamber regardless of the direction of movement of the piston within the cylinder of the pump. 
     In a feature, the pump comprises: a piston; a cylinder in which the piston is located, movement of the piston within the cylinder changing the volume of space in first and second piston areas on respective sides of the piston; an incoming chamber in fluid communication with the fourth fluid passageway; an outgoing chamber in fluid communication with the first fluid passageway; first and second one-way valves, the first one-way valve configured to permit flow from the incoming chamber to the first piston area and the second one-way valve configured to permit flow from the incoming chamber to the second piston area; and third and fourth one-way valves, the third one-way valve configured to permit flow to the outgoing chamber from the first piston area and the fourth one-way valve configured to permit flow to the outgoing chamber from the second piston area. Additionally, the pump further may comprise a standing pipe through which air flows into the first piston area and another standing pipe through which air flows from the first piston area; the apparatus further may comprise a first standing pipe in the cleansing fluid chamber through which air flows into the cleansing fluid chamber, a second standing pipe in the waste fluid chamber through which liquid flows into the waste fluid chamber; and a third standing pipe in the waste fluid chamber through which air flows out of the waste fluid chamber; and all of said standing pipes may be arranged in parallel relation to each other. 
     In another feature, the applicator defines a recessed area at which the area to be cleaned is covered. 
     In a feature, the applicator comprises a fluid distribution component through which cleansing fluid is conveyed from the second fluid passageway to the area to be cleaned. 
     In a feature, the applicator comprises a fluid suction port through which fluid is suctioned from the area to be cleaned, the fluid suction port in fluid communication with the third fluid passageway. 
     In a feature, the applicator comprises a central fluid suction port in fluid communication with the third fluid passageway through which fluid is suctioned from the area to be cleaned, and a plurality of openings arranged about the fluid suction port in fluid communication with the second fluid passageway through which cleansing fluid is applied to the area to be cleaned. 
     In a feature, an interior of the cleaning fluid chamber is visible from an exterior of the apparatus, whereby the extent to which the cleaning fluid has been used is visible by a person using the apparatus. 
     In a feature, an interior of the waste fluid chamber is visible from an exterior of the apparatus, whereby the extent to which the waste fluid chamber has been filled is visible by a person using the apparatus. 
     In a feature, the apparatus is hand portable. 
     In a feature, the applicator is located on a bottom side of the apparatus such that the apparatus is configured to be positioned over the area to be cleaned. 
     In another aspect, a method of cleaning an area with a manually operated, hand carried cleaning apparatus includes the steps of: filling a cleaning fluid chamber of the cleaning apparatus with a cleaning fluid; positioning the apparatus over the area to be cleaned and pressing the cleaning apparatus such that the cleaning apparatus encompasses the area and creates at least a partial seal surrounding the area; while so pressing the apparatus, manually actuating a pump of the apparatus such that air from a waste fluid chamber of the cleaning apparatus is pumped into a cleaning fluid chamber of the cleaning apparatus and, commensurate therewith, suctioning waste fluid from the area while applying cleaning fluid from the cleaning fluid chamber to the area, the waste fluid suctioned from the area being received and retained within the waste fluid chamber. 
     The method further includes, in a feature thereof, the steps of removing the cleaning apparatus from the area and emptying the waste fluid from the waste fluid chamber by pouring the waste fluid from the chamber. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a preferred cleaning apparatus for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention. 
         FIG. 2  is a perspective view of a side of the cleaning apparatus of  FIG. 1 . 
         FIG. 3  is a perspective view of the opposite side of the cleaning apparatus of  FIG. 1 . 
         FIG. 4  is a perspective view of a front of the cleaning apparatus of  FIG. 1 . 
         FIG. 5  is a perspective view of a back of the cleaning apparatus of  FIG. 1 . 
         FIG. 6  is a plan view of a top of the cleaning apparatus of  FIG. 1 . 
         FIG. 7  is a plan view of a bottom of the cleaning apparatus of  FIG. 1 . 
         FIG. 8  is a perspective view of a preferred cleaning apparatus for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention, which is the same as that of  FIG. 1  except that it includes a transparent outer wall through which the interior of the cleaning fluid chamber and waster fluid chamber are visible. 
         FIG. 9  is a perspective view of various components of the preferred cleaning apparatus of  FIG. 1 , including base, cylinder, and standing pipes. 
         FIG. 10  is a plan view of components of  FIG. 9 . 
         FIG. 11  is a cross-sectional view of the components of  FIG. 10  taken along the line  11 - 11 . 
         FIG. 12  is the plan view of  FIG. 10 . 
         FIG. 13  is a cross-sectional view of the components of  FIG. 12  taken along the line  13 - 13 . 
         FIG. 14 . is a perspective, schematic view of components of the preferred cleaning apparatus of  FIG. 1 . 
         FIG. 15 . is another perspective, schematic view of components of the preferred cleaning apparatus of  FIG. 1 . 
         FIG. 16  is a bottom plan view of a base component of the preferred cleaning apparatus of  FIG. 1 . 
         FIG. 17  is a bottom plan view of an applicator body component of the preferred cleaning apparatus of  FIG. 1 . 
         FIG. 18  is a bottom plan view of an applicator distribution component of the preferred cleaning apparatus of  FIG. 1 . 
         FIG. 19  is a bottom plan view of the combination of the base, applicator body, and applicator distribution plate. 
         FIG. 20  is a schematic illustration of a flow system of a preferred cleaning apparatus for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention. 
         FIG. 21  is a perspective view of another preferred cleaning apparatus for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention. 
         FIG. 22  is a similar view to that of  FIG. 21 , with the omission of some components in order to reveal the tops of the standing pipes and tops of the chambers and cylinder. 
         FIG. 23  is a perspective view including a top side of an applicator body of the apparatus of  FIG. 21 . 
         FIG. 24  is a perspective view including a bottom side of the applicator body of the apparatus of  FIG. 21 . 
         FIG. 25  is a perspective view including a bottom side of the container walls forming the chambers and cylinder of the apparatus of  FIG. 21 . 
     
    
    
     DETAILED DESCRIPTION 
     As a preliminary matter, it will readily be understood by one having ordinary skill in the relevant art (“Ordinary Artisan”) that the present invention has broad utility and application. As should be understood, any embodiment may incorporate only one or a plurality of the above-disclosed aspects of the invention and may further incorporate only one or a plurality of the above-disclosed features. Furthermore, any embodiment discussed and identified as being “preferred” is considered to be part of a best mode contemplated for carrying out the present invention. Other embodiments also may be discussed for additional illustrative purposes in providing a full and enabling disclosure of the present invention. As should be understood, any embodiment may incorporate only one or a plurality of the above-disclosed aspects of the invention and may further incorporate only one or a plurality of the above-disclosed features. Moreover, many embodiments, such as adaptations, variations, modifications, and equivalent arrangements, will be implicitly disclosed by the embodiments described herein and fall within the scope of the present invention. 
     Accordingly, while the present invention is described herein in detail in relation to one or more embodiments, it is to be understood that this disclosure is illustrative and exemplary of the present invention, and is made merely for the purposes of providing a full and enabling disclosure of the present invention. The detailed disclosure herein of one or more embodiments is not intended, nor is to be construed, to limit the scope of patent protection afforded the present invention, which scope is to be defined by the claims and the equivalents thereof. It is not intended that the scope of patent protection afforded the present invention be defined by reading into any claim a limitation found herein that does not explicitly appear in the claim itself. 
     Thus, for example, any sequence(s) and/or temporal order of steps of various processes or methods that are described herein are illustrative and not restrictive. Accordingly, it should be understood that, although steps of various processes or methods may be shown and described as being in a sequence or temporal order, the steps of any such processes or methods are not limited to being carried out in any particular sequence or order, absent an indication otherwise. Indeed, the steps in such processes or methods generally may be carried out in various different sequences and orders while still falling within the scope of the present invention. Accordingly, it is intended that the scope of patent protection afforded the present invention is to be defined by the appended claims rather than the description set forth herein. 
     Additionally, it is important to note that each term used herein refers to that which the Ordinary Artisan would understand such term to mean based on the contextual use of such term herein. To the extent that the meaning of a term used herein—as understood by the Ordinary Artisan based on the contextual use of such term—differs in any way from any particular dictionary definition of such term, it is intended that the meaning of the term as understood by the Ordinary Artisan should prevail. 
     Regarding applicability of 35 U.S.C. §112, ¶6, no claim element is intended to be read in accordance with this statutory provision unless the explicit phrase “means for” or “step for” is actually used in such claim element, whereupon this statutory provision is intended to apply in the interpretation of such claim element. 
     Furthermore, it is important to note that, as used herein, “a” and “an” each generally denotes “at least one,” but does not exclude a plurality unless the contextual use dictates otherwise. Thus, reference to “a picnic basket having an apple” describes “a picnic basket having at least one apple” as well as “a picnic basket having apples.” In contrast, reference to “a picnic basket having a single apple” describes “a picnic basket having only one apple.” 
     When used herein to join a list of items, “or” denotes “at least one of the items,” but does not exclude a plurality of items of the list. Thus, reference to “a picnic basket having cheese or crackers” describes “a picnic basket having cheese without crackers”, “a picnic basket having crackers without cheese”, and “a picnic basket having both cheese and crackers.” Finally, when used herein to join a list of items, “and” denotes “all of the items of the list.” Thus, reference to “a picnic basket having cheese and crackers” describes “a picnic basket having cheese, wherein the picnic basket further has crackers,” as well as describes “a picnic basket having crackers, wherein the picnic basket further has cheese.” 
     Referring now to the drawings, one or more preferred embodiments of the present invention are next described. The following description of one or more preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its implementations, or uses. 
     In particular, a preferred cleaning apparatus  10  for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention is shown in  FIG. 1 .  FIGS. 2-5  are side elevational views of apparatus  10 ,  FIG. 6  is a plan view of a top of apparatus  10 , and  FIG. 7  is a plan view of a bottom of the apparatus  10 . A similar apparatus  20  having transparent outer wall  14 ′ is shown in  FIG. 8 , and the follow description of apparatus  10  is equally applicable to apparatus  20 . 
     Cleaning apparatus  10  is hand transportable and hand operable, and includes a handle  12 ; an outer wall  14 ; a base  16 ; and an applicator  18 . 
     As shown in  FIG. 8 , the handle  12  is attached to a piston  11  and includes a head  13 . The piston  11  and head  13  are disposed within cylinder  15 . The piston head  13  is disk-shaped and creates an airtight seal with the interior wall of the cylinder  15  against which it moves, and against standing pipes  36 , 38  of the pump, which are described in greater detail below. In this respect, the head  13  defines openings through which the standing pipes  36 , 38  extend during movement of the head  13  within the cylinder  15 . Movement of the handle  12  up and down relative to the outer wall  14  and base  16  causes the head  13  of the piston  11  to move back and forth within the cylinder  15  and displace the air within the cylinder  15 . The handle  12 ; piston  11 ; cylinder  15 ; and standing pipes  36 , 38  all form part of a manually operated pump, the operation of which is described in greater detail below. 
     The outer wall  14  of the apparatus  10  defines, in part, the outer walls of two interior chambers, including a cleansing fluid chamber  22 , and a waste fluid chamber  24 , which are perhaps best seen in  FIG. 8  with reference to apparatus  20 . An interior wall  17  of the apparatus defines the interior walls of the respective chambers  22 , 24 . The interior wall  17  also defines the cylinder  15  within which the piston  11  moves and head  13  resides. 
     Each chamber includes an opening through which liquid is poured. With respect to the cleansing fluid chamber  22 , a cap  6  covers the opening; and with respect to waste fluid chamber  24 , a cap  8  covers that opening. A cleaning fluid to be used to cleanse an area is poured through the opening into the cleansing fluid chamber  22  in preparation for cleaning, and waste fluid suctioned from the area is poured from the waste fluid chamber  24  after cleaning. In the apparatus  10 , the interior wall  17  generally divides the apparatus in half and separates the cleansing fluid from any waste fluid in the respective chambers  22 , 24 . 
     The applicator  18  is located on the bottom of the apparatus  10 , and is used to cover an area to be cleaned. Specifically, when the apparatus  10  is positioned over the area to be cleaned and the apparatus  10  is pressed, the applicator  18  encompasses the area and creates at least a partial seal surrounding the area by engagement of a rim  19  of the applicator  18  with a surrounding perimeter of the area. The rim  19  is perhaps best seen in  FIGS. 11 ,  13  and  19 . 
       FIG. 9  is a perspective view of various components of cleaning apparatus  10 , including base  16 , piston  11  and head  13 , and standing pipes  30 , 32 , 34 , 36 , 38 . Air flows through standing pipe  30  into the cleansing fluid chamber  22 ; waste fluid suctioned from an area being cleaned flows through standing pipe  32  into waste fluid chamber  24 ; and air flows from waste fluid chamber  24  through standing pipe  34 . Part of the air from the waste fluid chamber  24  travels to one area of the pump through standing pipe  36 , and then travels from that side through standing pipe  38 . The standing pipes  30 , 32 , 34 , 36 , 38  are in parallel relation to each other and to the cylinder  15  in which the piston head  113  moves. One-way valve  40  is also visible in part in  FIG. 9 , through which the other part of the air from the waste fluid chamber  24  travels to the other area of the pump. 
       FIG. 10  is a plan view of components of  FIG. 9 . Solid arrows indicate flow of fluid and, in particular, flow of waste fluid through standing pipe  32  into waste fluid chamber  24 , and flow of cleansing fluid from cleansing fluid chamber  22  through opening  50  defined in the base  16  for travel to applicator  18 . Open arrows indicate the flow of air and, in particular, flow of air from the waste fluid chamber  22  into and down standing pipe  34  toward the pump, and flow of air from the pump up through standing pipe  30  into the cleansing fluid chamber  22 .  FIG. 12  is the same view as  FIG. 10 . 
       FIG. 11  is a cross-sectional view of the components of  FIG. 10  taken along the line  11 - 11 . The split of air flow through the pump is perhaps best seen in  FIG. 11  taken in conjunction with  FIG. 13 . The complete flow of air from the waste fluid chamber  24  travels through standing pipe  34  and take either one of two paths depending on the direction of travel of the piston  11  within the cylinder  15 . When the piston is traveling upwardly (due to the handle  12  being pulled away from the base  16 ), air flows through umbrella valve  42  up through standing pipe  36  into a first piston area. This path is indicated by open arrows shown adjacent the numeral ‘1’. On the other hand, when the piston is traveling downwardly (due to the handle  12  being pushed toward the base  16 ), air flows through umbrella valve  40  into a second piston area. This path is indicated by open arrows shown adjacent the numeral ‘2’. 
       FIG. 11  also shows waste fluid flow away from the applicator  18 , through standing pipe  32 , into waste fluid chamber  24 . A one-way valve  44  is provided in order to inhibit reverse flow of the waste fluid back toward applicator  18 , which would be undesirable. 
       FIG. 13  is a cross-sectional view of the components of  FIG. 12  taken along the line  13 - 13 . The split air flow path through the pump, discussed above, is recombined on the other side of the pump as shown in  FIG. 13 . In particular, the air from the first piston area travels down standing pipe  38  and through umbrella valve  46 , whereat air flow from the second piston area also travels through umbrella valve  48 . Air flow from both of the one-way valves  46 , 48  then travels through one-way valve  50  and travels up through standing pipe  30  into the cleansing fluid chamber  22 . The air flow path from the first piston area is indicated by open arrows shown adjacent the numeral ‘1’, and the air flow path from the second piston area is indicated by open arrows shown adjacent the numeral ‘2’. 
     The piston areas are located on opposite sides of the piston head. As will be appreciated, movement of the piston head within the cylinder changes the volume of space in the first and second piston areas, wherein one increases as the other decreases, and vice-versa. This results in air being drawn into one of the piston areas concurrently with air being expelled from the other of the piston areas, and provide a dual-action pump whereby continuous pumping of air is provided during both forward and back (or up and down) strokes of the piston. 
       FIGS. 14 and 15  further illustrate the standing pipes and one-way valves, and further schematically illustrate the defines recesses and resulting intermediate compartments that are defined thereby on the underside of the base  16  when the base  16  and applicator  18  are attached. Further in this respect,  FIG. 17  shows the recessed spaces defined on the bottom of the base. The top of the applicator  18  includes corresponding walls for engaging the base when the two components are secured together. The intermediate compartments include the locations at which the air flow is split and then later recombined, as discussed above. Specifically, the space  45  shown in  FIG. 16  forms the compartment in which the airflow is split, and the space  47  shown in  FIG. 16  forms the compartment where the airflow is recombined. 
       FIG. 17  shows a bottom of the applicator body, which includes two openings  52 , 54 . Cleansing fluid for applying to the area to be cleaned travels through opening  52  onto a distribution plate  60 , and waste fluid suctioned from the area through a suction port  62  of the distribution plate  60  travels through opening  54 . A bottom plan view of the distribution plate  60  is shown in  FIG. 18  and shows the suction port  62 . Moreover, a plurality of dispensing opening  64  are arranged about the suction port  62 . The cleansing fluid flowing onto the top side of the distribution plate  60  travels to one of the dispensing openings  64  and is dispensed therethrough onto the area being cleaned. It will be appreciated that flow through the area being cleaned, which area is at least partially sealed by the rim  19  of the applicator body  18 , travels generally from the dispensing openings  64  arranged about the suction port  62  in a radial toward the suction port  62 , as shown by the arrows in  FIG. 19 . 
     The general flow of the cleaning apparatus  10  is shown in  FIG. 20 . Specifically, air is pumped into the cleansing fluid chamber of the cleaning apparatus; cleansing fluid is thereby expelled from the cleansing fluid chamber to the applicator, where it is applied to the area being cleaned; waste fluid is suctioned from the area being cleaned into the waste fluid chamber; and air is drawn from the waste fluid chamber to the pump for delivery to the cleaning fluid chamber via the pump. It will be appreciated that the withdrawal of the air form the waste fluid chamber results in a low pressure that, in turn, results in the air flow and suctioning of the waste fluid from the applicator to the waster fluid chamber. 
     It will thus be appreciated that air is transferred through the pump from the waste fluid chamber to the cleansing fluid chamber as cleansing fluid is transferred through the applicator from the cleansing fluid chamber to the waste fluid chamber and waste fluid is transferred from the area being cleaned to the waste fluid chamber. 
     In use of the cleaning apparatus  10 , the cleansing fluid chamber is filled with a cleansing fluid. Water may be used, or a solution including a solvent or other chemical may be used. The apparatus is next positioned over the area to be cleaned. While pressing the apparatus, the pump is manually actuated by moving the handle and piston up and down. This results in the flow represented in  FIG. 20 , wherein cleansing fluid is applied to the area and waste fluid is suctioned from the area. Additionally, the application of the cleansing fluid concurrently with the suctioning of the waste fluid is continuous since the pump is a dual action pump, driving the flow in both up and down strokes. 
     If the interior of the cleansing fluid chamber is visible from an exterior of the apparatus, the extent to which the cleansing fluid has been used can be monitored by a person using the apparatus. Once the cleansing fluid is exhausted, the cleaning process is stopped and the waste fluid is disposed of. If needed, the cleaning operation can be repeated once additional cleansing fluid has been added to the cleaning fluid chamber. 
       FIG. 21  is a perspective view of another preferred cleaning apparatus  100  for lifting, removing and extracting a spill or stain in accordance with one or more aspects and features of the present invention.  FIG. 22  is a similar view to that of  FIG. 21 , with the omission of some components in order to reveal the tops of the standing pipes and tops of the chambers and cylinder. Additionally,  FIG. 23  is a perspective view including a top side of an applicator body of the apparatus of  FIG. 21 ;  FIG. 24  is a perspective view including a bottom side of the applicator body of the apparatus of  FIG. 21 ; and  FIG. 25  is a perspective view including a bottom side of the container walls forming the chambers and cylinder of the apparatus of  FIG. 21 . 
     The apparatus  100  includes structure and operates in accordance with the same theory as apparatus  10  and  20  discussed above, and like those other embodiments, it includes a handle  112 ; outer wall  114 ; base  116 ; and applicator  118 . The outer wall  114 , together with an inner wall, define the cleansing fluid chamber  122  and waste fluid chamber  124 . A cap covers  106  an opening to the cleansing fluid chamber  122 ; and a cap  108  covers an opening to the waste fluid chamber  124 . In one difference, the cylinder  115  of the pump is disposed in part on the outside and is defined by both the inner and outer walls. The piston  111  and piston head  113  are located within the cylinder, as shown, and two standing pipes  136 , 138  are also included as before for flow to and from the first piston area  172 . The second piston area  174  is located on the opposite side of the piston head  113 , which seals off the two areas from each other. 
     Also, unlike the prior apparatus  10 , 20 , the cleaning apparatus  100  includes only three standing pipes instead of five. The standing pipes for flow of the waste fluid into the waste fluid chamber  124 , and flow of the air into the cleaning fluid chamber  122 , may be omitted as shown. In alternatives, one or both of these omitted standing pipes are included. 
     As before, the movement of the piston  111  and piston head  113  within the cylinder  115  results in the pumping of air into the cleansing fluid chamber  122  regardless of the direction of movement of the piston  111  within the cylinder  115 . 
     Yet additional embodiments of cleaning apparatus in accordance with one or more aspects of the present invention are disclosed in the incorporated Appendix. 
     Based on the foregoing description, it will be readily understood by those persons skilled in the art that the present invention is susceptible of broad utility and application. Many embodiments and adaptations of the present invention other than those specifically described herein, as well as many variations, modifications, and equivalent arrangements, will be apparent from or reasonably suggested by the present invention and the foregoing descriptions thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to one or more preferred embodiments, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for the purpose of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended to be construed to limit the present invention or otherwise exclude any such other embodiments, adaptations, variations, modifications or equivalent arrangements, the present invention being limited only by the claims appended hereto and the equivalents thereof.