Patent Publication Number: US-2022218096-A1

Title: Grill brush with rotatable grate-cleaning implement plate

Description:
PROVISIONAL PRIORITY CLAIM 
     Priority based on Provisional Application Ser. No. 63/119,020 filed Nov. 30, 2020, and titled “GRILL BRUSH WITH ROTATABLE GRATE-CLEANING IMPLEMENT PLATE” is claimed. Moreover, the entirety of the previous provisional application, including the drawings, is incorporated herein by reference as if set forth fully in the present application. 
    
    
     BACKGROUND 
     Numerous, variously-configured implements for cleaning cooking grills exist. These implements typically take the form of brushes, scrapers, or some combination of a brush and scraper. A basic configuration of a brush with a scraper includes a handle with a distal end having a lower side from which protrudes a plurality of bristles and an upper side to which there is affixed a scraper blade. One issue with this traditional configuration is that the bristles wear out long before the handle or scraper blade do. Moreover, it is usually the forwardmost bristles that wear first, while more rearward bristles remain perfectly serviceable. As a result, brushes are frequently discarded—handle and all—after the forwardmost bristles are worn, but with the bristles located nearest the handle, and well as the scraper, still in near-new condition. 
     Additionally, grill brushes conforming to the basic configuration do not permit the bristles to reach the full lengths of the grill-grate bars, for example, before the scraping edge of the scraping blade contacts the side of the firebox, thereby limiting access by the bristles to surfaces to be cleaned. Conversely, in some designs, full access to surfaces by the scraper is impeded by the bristles of the brush portion contacting surfaces of the cooking grill. A still-additional limitation of a traditional grill brush is that, at least in normal use, the scraper is immovably affixed to the upper side, and has a single usable end with limited functionally. 
     Accordingly, a need exists for a grill brush with a replaceable or reversible brush head and a grill-cleaning implement plate that includes a scraper on one end and is rotatable in order to (a) move the scraper out of the way so that the brush bristles can access more surfaces or (b) deploy disparate grill-cleaning implements situated on an end of the implement plate opposite the scraper, thereby enhancing the functionality of the grill brush. 
     SUMMARY 
     In a first embodiment generally illustrative of the invention, a grill brush includes a brush head and a brush handle cooperatively configured such that the brush handle can is selectively capture and retain the brush head. The brush head includes a brush-head block defining brush-head upper and lower surfaces extending longitudinally along a brush-head axis between brush-head rear and forward ends, and laterally opposed brush-head left and right sides extending between the brush-head upper and lower surfaces and longitudinally between the brush-head rear and forward ends. The brush head further includes at least one bristle array defined by a plurality of bristles protruding from the brush-head lower surface, each of the bristles terminating in a bristle tip for engaging a work surface. 
     The brush handle includes a grip portion which, in each of various versions, is configured for grasping by a human hand. Integral with or otherwise depending from the grip portion is a brush-head mount by which the brush head can be selectively captured and retained. The brush handle has a lengthwise extent disposed generally along a handle axis between handle proximate and distal ends. 
     The brush-head mount at least partially defines the handle distal end and includes a mounting surface. The mounting surface and the brush-head upper surface are cooperatively configured such that (i) the brush handle can selectively capture and removably retain the brush head and (ii) when the brush head is retained by the handle, there is defined an attachment plane between the mounting surface and the brush-head upper surface. 
     Situated at least partially between the brush-head upper surface and the brush-head mount is a grill-cleaning implement plate, which may be alternatively and interchangeably referred to as “implement plate” or simply “plate.” The implement plate extends longitudinally along the attachment plane between plate back and front ends. At least one of the plate back and front ends has depending therefrom at least one grate-cleaning implement. In one version, for example, the plate front end terminates at and defines a scraper blade pitched at a blade angle relative to the attachment plane such that a scraping edge of the scraper blade is situated at least one of (a) above and (b) forward of the brush-head block. Grate-cleaning implements alternative to a scraper blade are considered later in the summary and detailed description, but are not, in any event, considered a limiting feature of various embodiments. 
     The plate is an element separate (i.e., distinct) from both the handle and the brush head. Accordingly, when the brush head is selectively removed from the handle, the plate is freed—or can be freed—from between the brush-head upper surface and the brush-head mount, thereby enabling replacement of the plate. Most commonly, when the plate includes a scraper, the plate and scraper are part of the same unitary structure. For this reason, a plate having an associated integral scraper may, when applicable, be referred to alternatively as a “scraper plate” in the specification and/or the claims, most especially when the implement plate defines, includes, or carries no implement other than a scraper. 
     According to one version, the implement plate is retained as part of the assembled grill brush in part by virtue of being interposed (sandwiched) between the brush-head upper surface and the mounting surface of the brush-head mount. 
     Moreover, with the brush head fixed (i.e., immovably retained) relative to the brush handle, the plate can be rotated about a plate-rotation axis between mutually opposed first and second angular orientations. Relative to the brush handle, the first angular orientation is such that the plate front end is situated forward of the plate rear end, while the second angular orientation is such that the plate front end is situated rearward of the plate rear end. The plate front and rear ends are on opposite sides of the plate-rotation axis. The plate can be selectively locked in at least each of the first and second angular orientations by various alternative mechanisms, illustrative, non-limiting examples of which are later described in the detailed description. 
     In displacing the plate between the first and second angular orientations, the plate rotates—while retained between the brush handle and brush head—along a plate rotation plane relative to which the plate-rotation axis extends orthogonally. The plate rotation plane is one of (i) parallel to and (ii) identical with the attachment plane. In each of various embodiments, the rotatability of the plate serves purposes later explained. 
     As described, the plate rotates between the brush-head mount of the brush handle and the brush-head upper surface, while the brush head is stationary relative to the handle. In various embodiments, the brush head is retained to the handle by a brush-head fastener centrally located along the plate-rotation axis. However, in order to prevent the rotation of the brush head relative to the handle as the plate is rotated, there is provided at least one off-center lug that mechanically connects, and creates mechanical interference between, the brush-head mount and the brush head. Illustratively, the lug is in the form of a pin or rod that extends into and between each of the brush-head mount and the brush-head block. Alternatively, the lug could be integrally formed with one of the brush-head mount and the brush-head block and be selectively received into a lug-receiving recess defined in the other of the brush-head block and the brush-head mount. Regardless of the lug configuration, it is important to various implementations that the lug(s) and lug-receiving recess(es) facilitate selective separation of the brush head from the brush-head mount. Removability of the brush head facilities replacement of worn brush heads, installation of disparate brush heads for different cleaning and/or surface-preparation functions, and/or reversal of a brush head on the brush-head mount. 
     In addition to being off center of the plate-rotation axis, the lug extends through the plate. In order to facilitate plate rotation unimpeded by the off-center lug, there is defined through the implement plate of one embodiment an arcuate lug slot centered about the rotation axis. As the plate is rotated, the off-center lug travels within the arcuate lug slot. Desirably, the arcuate lug slot defines a circular arc that subtends an angle sufficiently large to accommodate plate rotation of at least 180°. In this way, the plate can be alternatively positioned into first and second angular orientations that are 180° in opposition. 
     According to one version, the implement plate front end terminates at and defines a scraper blade pitched at a non-zero blade angle relative to the attachment plane such that a scraping edge of the scraper blade is situated at least one of (a) is above and (b) forward of the brush-head block. Additionally, however, the plate back end carries a plurality of grill-grate-abrading elements, such as tines. Each of the tines includes a tine base by which it is retained by the plate back end and from which extends a tine shank terminating in a tine tip opposite the tine base. Moreover, each tine is pitched at a tine angle relative to the attachment plane such that the tine tip is situated at least one of (a) above and (b) rearward of the brush-head block. 
     The rotation of an implement plate configured as described above about the plate-rotation axis changes the relative positons of the scraper blade and the tines in order to facilitate their use is different grill cleaning functions. More specifically, when the plate is in the first angular orientation, the scraper blade is situated forward of the tines. Conversely, when the plate is in the second angular orientation, the tines are situated forward of the scraper blade. Relative to each of the scraper blade and the tines, the angular orientation in which it/they are forward of the other is regarded as the “deployed orientation.” In order to use either the scraper blade or tines in the deployed orientation to engage a grill surface to be cleaned, the brush handle is inverted such that the brush head is above the plate. For purposes of consistent spatial and directional orientation, unless otherwise noted, the relative terms “rearward of” and “forward of” are defined with respect to a user of the grill brush but also, in more “self-contained” and universally applicable terms, with reference to the handle proximate end, which is always regarded as rearward of the brush head, irrespective of how a user is grasping the grill brush at any given time, or if anyone is holding it at all. 
     The scraper can be used to scrape grease, burned food, and other debris from the top surfaces of the mutually parallel bars of a grill grate (hereinafter, “grill-grate bars”), as well as other surfaces within the firebox of a grill. The tines, on the other hand, can be deployed to access and remove debris from the sides of the grill-grate bars, areas that would otherwise be inaccessible. Spacing between adjacent tines accommodates a grill-grate bar in order to facilitate engagement of each tine with the sides of adjacent grill-grate bars. 
     In some variants, each tine further comprises tine bristles. More specifically, in one configuration, a rigid tine shank extends along and defines a tine-shank axis that extends from the tine base to the tine tip. The tine bristles depend from the tine shank and extend outwardly therefrom with components of spatial extension perpendicular to the tine-shank axis. In one specific version, the rigid tine shanks are in the form of twisted wire in which two runs of wire are arranged side-by-side and twisted in order to form a double-helix that extends along the tine-shank axis. The two “runs” of stiff wire can be formed from a single wire folded over into “hairpin” configuration before twisting. During the fabrication process, and before the two parallel runs of wire (wire rod) are twisted to form the double helix, thinner and shorter wire strands are placed therebetween in an orientation generally perpendicular to the wire rods. The twisting of the larger wire rods forming the helix clamps down on the small wires and traps them between the twisted wire runs. These shorter and thinner wires constitute the bristles. Twisted wire brushes are already known in the art, thereby obviating the need for more in-depth explanation. When the tines are of the general configuration described above, they may be alternatively and interchangeable referred to as “bore brushes.” In other words, for the purposes of the present specification and claims, a “bore brush” is regarded as a sub-category of “tine.” 
     Among alternative embodiments, the brush head includes bristles varying in length, thickness, coarseness, and material, for example. Bristle arrays comprising bristles of disparate types, sizes, and materials facilitate use of brushes of the general type disclosed in a broader scope of applications, from general cleaning and scrubbing of surfaces, to surface preparation for painting, to cleaning the grates of cooking grills. Accordingly, while the brushes disclosed and described herein are generally presented as “grill brushes,” it is to be understood that this is the principal context that inspired their conception, and that, absent explicit claim limitations, this designation is not intended to expressly or impliedly limit the application of brushes defined within the scope of the claims, their designation as “grill brushes” notwithstanding. 
     Alternative embodiments may manifest in the form of brush kits, each of which kits is comprised of at least one brush handle that accepts a variety of brush heads. The brush heads could vary in shape, size, bristle-type, bristle-array configuration, and bristle material, for example. It is envisioned that a handle could be retained and, when brush heads wear out, or different brush heads and bristle types are required, additional brush heads compatible with the handle could be purchased as replacements and/or additions to a brush owner&#39;s existing array of brush heads. 
     In a broad aspect, the implement plate could be rotated by direct contact between a user&#39;s fingers and the plate. However, each of various embodiments includes a rotary dial that (i) is carried by and within the brush-head mount of the handle and (ii) facilitates plate rotation from above the brush-head mount (i.e., from the side of the brush-head mount opposite the side of the brush-head mount to which the brush head is attached). 
     The rotary dial has dial upper and lower surfaces, the upper surface being accessible to fingers of a user from above the brush-head mount. The rotary dial is rotatable within a dial-retaining channel defined within the brush-head mount. Mechanical engagement between the rotary dial and the implement plate facilitates the rotation of the implement plate between the mutually opposed first and second angular orientations previously described. The rotary dial is rotatable about a dial-rotation axis that coincides with the plate-rotation axis. 
     According to a first illustrative embodiment including a rotary dial, in addition to rotational displacement, the dial-retaining channel accommodates the linear displacement—along the dial-rotation axis—of the rotary dial “upward” and “downward” respectively away from and toward the brush head situated below the brush-head mount. The rotary dial carries a lock protuberance that, in various configurations, serves dual purposes. A first purpose is to retain the rotary dial within the brush-head mount by extending under an annular inner step defined within dial-retaining channel. As the rotary dial is rotated within the dial-retaining channel, the lock protuberance rides along the annular inner step, thereby retaining the rotary dial within the dial-retaining channel. A second purpose of the lock protuberance relates to defining “locked” or “set” positions of the rotary dial corresponding to the first and second angular orientations of the implement plate. 
     The brush-head mount has defined therein at least first and second protuberance-receiving recesses diametrically opposed on opposite sides of the plate-rotation and dial-rotation axes. In one embodiment, the first and second protuberance-receiving recesses are defined along the annular inner step that engages with the lock protuberance to retain the rotary dial within the dial-retaining channel. A “locked” position of the rotary dial is an “upward” position thereof in which the lock protuberance is received within one of the first and second protuberance-receiving recesses. In a locked position, the lock protuberance is mechanically engaged (e.g., in an interference fit) with one of the first and second protuberance-receiving recesses in order to prevent—or at least provide resistance against—unintentional rotation of the rotary dial. Conversely, an unlocked position of the rotary dial is a “downward” position in which the lock protuberance is mechanically disengaged from both of the first and second protuberance-receiving recesses in order to permit desired rotation of the rotary dial. The rotary dial is mechanically linked to the implement plate such that, as the rotary dial is rotated about the dial-rotation axis, the implement plate rotates in unison therewith about the plate-rotation axis. 
     In the first illustrative embodiment, the rotary dial is normally biased upward toward a locked position. “Normally” in this context denotes “usually” or “by default,” and not orthogonally. The mechanical biasing action is provided by a biasing member. Illustratively, the biasing member is a coiled spring carried within the brush-head mount and helically disposed about the plate-rotation and dial-rotation axes. The biasing member acts to mechanically bias the rotary dial upwardly from below the rotary dial upper surface. In order to rotate the plate, a user depresses the rotary dial downwardly into the dial-retaining channel and rotates it until the desired plate orientation is achieved. 
     Depending on the specific configuration of the lock protuberance and the protuberance-receiving recesses, a user might not actually need to actively push down on the dial in order to cause it to depress into the dial-retaining channel of the brush-head mount. Instead, user-applied torque of sufficient magnitude will cause the lock protuberance to mechanically disengage from a protuberance-receiving recess, thereby reducing the resistance to dial rotation. As the rotary dial is rotated, and the lock protuberance rides along the annular inner step, the lock protuberance will eventually arrive at, and mechanically engage with (“pop into”) the opposing protuberance-receiving recess, thereby “locking” the plate into the position opposite that from where it began. 
     In a second illustrative embodiment including a rotary dial, the rotary dial does not linearly displace “upwardly′ and “downwardly” along the dial-rotation axis. Instead, the rotary dial includes a generally cylindrical barrel defined by a dial side wall. The cylindrical barrel is configured to rotate within a cylindrical dial-retaining channel defined within the brush-head mount. The dial side wall includes at least one peripheral protrusion configured to selectively mechanically interfere with opposed recesses defined within the dial-retaining channel. The peripheral protrusion is carried by a flexible element that provides a restorative force to mechanically bias the protrusion into engagement (i.e., mechanical interference) with the recesses of the dial-retaining channel. Because the protrusion is carried on the periphery of the rotary dial, axial displacement of the rotary dial is unnecessary to lock and unlock the rotary dial and implement plate in opposed first and second angular orientations. Details of the rotary dial associated with the second illustrative embodiment are presented in the detailed description. 
     As previously explained relative to an illustrative embodiment, the brush head is retained to the handle by a brush-head fastener centrally located along the plate-rotation axis. Illustratively, the brush-head fastener is an externally threaded fastener with a keyed head that facilitates rotation thereof by a complementarily-keyed tool such as a screwdriver or hex key. In each of various configurations, the brush-head fastener is held captive within a brush-head fastener channel defined within the brush-head mount. Moreover, the brush-head fastener is accessible from above the brush-head mount to enable selective detachment for the brush head from the brush-head mount. Accordingly, in an embodiment including a rotary dial configured as generally described above, the rotary dial includes a fastener-access channel extending therethrough along the dial-rotation axis. The fastener-access channel facilitates insertion of a tool (e.g., screwdriver or hex key) through the rotary dial and down into the brush-head fastener channel so that a user can selectively thread the brush-head fastener into or out of an internally-threaded fastener hole defined through the brush-head upper surface. 
     Representative embodiments are more completely described and depicted in the following detailed description and the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a left-side elevation view of a grill brush according to a first illustrative embodiment including a brush head, a brush handle, and grate-cleaning implement plate interposed between the brush head and handle, wherein the brush head is angularly fixed (i.e., not configured for rotation) relative to the brush handle, while the plate is retained for rotation relative to both the handle and the brush head; 
         FIG. 2  is a cross-sectional view of the grill brush depicted in  FIG. 1  with an alternative plate configuration; 
         FIG. 3  is a partially exploded view of the grill brush shown in  FIGS. 1 and 2  with the plate configuration of  FIG. 2 ; 
         FIG. 4  is a fully exploded view of the brush handle assembly of the grill brush in  FIGS. 1-3  depicting the internal mechanisms for selectively rotating the implement plate; 
         FIG. 5  is a bottom view showing the brush-head mount portion of the brush handle of  FIGS. 4 and 5  with a plate-rotating rotary dial installed; 
         FIG. 5A  shows an enlargement of the rotary dial of  FIG. 5  in isolation, but in the same orientation in in which the rotary dial is depicted in  FIG. 5 ; 
         FIG. 6  depicts a grill-cleaning implement plate in isolation; 
         FIG. 7  shows an alternatively configured grill brush according to a second illustrative embodiment having a grill-cleaning implement plate that—like the embodiment of  FIGS. 1-6 —is rotatable relative to the brush handle between first and second angular orientations into which it can be selectively retained or “locked,” but with a simplified set of mechanisms relative thereto; 
         FIG. 8  is a cross-sectional view of the grill brush shown in  FIG. 7 ; and 
         FIG. 9  is a partially exploded cross-sectional view of the embodiment of  FIGS. 7 and 8 ; 
         FIG. 10  is a top perspective view of the brush head of the embodiment of  FIGS. 7-9  shown in isolation; 
         FIG. 11  is a top perspective view of the brush head of  FIG. 10  in which a grill-cleaning implement plate has been set thereon for rotation relative to the brush head; 
         FIG. 12  shows the rotary dial and a top view of a portion of the handle associated with the second embodiment including a brush-head mount into which the rotary is configured to be seat for rotation; and 
         FIG. 13  depicts how tines carried by the implement plate of the second embodiment engage the bars of a grill grate to remove debris therefrom. 
     
    
    
     DETAILED DESCRIPTION 
     The following description of variously configured grill brushes and grill brush systems is demonstrative in nature and is not intended to limit the invention or its application of uses. Accordingly, the various implementations, aspects, versions and embodiments described in the summary and detailed description are in the nature of non-limiting examples falling within the scope of the appended claims and do not serve to restrict the maximum scope of the claims. 
     Shown in the included drawings are various views and illustrative versions of grill brushes generally identified by the reference number  10 . The invention is explained in the context of two main illustrative embodiments, each of which includes illustrative variations in its subcomponents and specific functionalities. A main first embodiment is holistically described initially with general reference to  FIGS. 1-3 , while  FIGS. 4-6  variously depict subcomponents of the grill brush  10  of  FIGS. 1-3 . A main second embodiment is holistically described initially with general reference to  FIGS. 7-9 , while subcomponents specific to it are depicted in, and described with principal reference to,  FIGS. 10-13 . The main first and second embodiments have several basic components and features in common. Accordingly, for purposes of efficiency, the early portions of the detailed description are written in a way that applies to both main embodiments, except where expressly noted, while later portions of the detailed description, labeled with their own sub-headings, are dedicated to describing aspects that differentiate each of the two main embodiments from the other. As will be appreciated more fully later in the description, the two main embodiments differ most significantly in very particular mechanical elements for facilitating rotation of a grill-cleaning implement plate. 
     While early portions of the detailed description are largely applicable to the two main embodiments, the description frequently refers to the two embodiments in the singular. For example, reference may be made to “the grill brush  10 ” in a manner intended to refer to each of the two main embodiments simultaneously when the description is equally applicable to both. Moreover, for the sake of efficiency and descriptive clarity, illustrative, non-limiting additions, optional features, and alternative configurations of various elements relative to a main embodiment are described with conjunctive reference to that main embodiment. Additionally, throughout the specification and drawings, like elements across alternative embodiments are referenced by similar or identical numeric and/or alphanumeric reference characters. 
     With initial reference to the assembled view of  FIG. 1  and the exploded view of  FIG. 3  of the first embodiment, and  FIGS. 7-9  of the second embodiment, a bristle-retaining brush head  20  (alternatively referred to as “brush head  20 ”) includes a brush-head block  20 B having brush-head upper and lower surfaces  22  and  24  extending longitudinally along a brush-head axis A BH  between brush-head rear and forward ends  32  and  34 . Additionally, extending between the brush-head upper and lower surfaces  22  and  24 , and longitudinally along the brush-head axis A BH  between brush-head rear and forward ends  32  and  34  are laterally opposed brush-head left and right sides  36  and  38 . The initial designations of the brush-head rear and forward ends  32  and  34  is, of course, entirely arbitrary, particularly in embodiments, such as the ones depicted, that are symmetrical about a center plane (not shown) when viewed from either of the brush-head left and right sides  36  and  38 . 
     With continued reference to  FIGS. 1 and 3 , and additional reference to the cross-sectional view of  FIG. 2 , as well as  FIGS. 7-9 , the illustrative grill brush  10  further includes a brush handle  70  having brush-handle top and bottom surfaces  72  and  74  which, while contoured, have a lengthwise extent disposed generally along a handle axis A H  between handle proximate and distal ends  82  and  84 . The brush handle  70  further includes a grip portion  86  configured for grasping by a human hand. Integral with or otherwise depending from the grip portion  86  is a brush-head mount  88  by which the brush head  20  can be selectively captured and retained. 
     The brush-head mount  88  at least partially defines the handle distal end  84  and includes a mounting surface  90 . The mounting surface  90  and the brush-head upper surface  22  are cooperatively configured such that (i) the brush handle  70  can selectively capture and removably retain the brush head  20  and (ii) when the brush head  20  is retained by the brush handle  70 , there is defined an attachment plane P A  between the mounting surface  90  and the brush-head upper surface  22 . The handle axis A H  is pitched at a first angle θ 1  relative to the attachment plane P A . 
     Retained by the brush head  20 , and depending from the brush-head lower surface  24  thereof, is at least one bristle array  40  comprising a plurality of bristles  45 , each of which bristles  45  terminates in a bristle tip  45 T configured for engaging a work surface. Among alternative versions, the bristle array(s)  40  may be disparately configured. In the version of  FIGS. 1-3  presently under consideration, and as shown most clearly in  FIG. 2 , each of three bristle arrays  40  comprises a rigid spine  42  from which radially extend a plurality of bristles  45 . In this version, each rigid spine  42  comprises twisted wire. Each twisted wire spine  42  has a main or central spine portion  43  that extends between spine first and second ends  44   a  and  44   b . Although the bristle arrays  40  and bristles  45  associated with the second embodiment may be configured similarly to those of the first embodiment, in most instances, only the general contours of the bristle arrays  40  are shown relative to the second embodiment in order to render the figures clear for lead lines leading to more central components of the grill brush  10 . Accordingly, the more detailed illustrations of bristles  45  and bristles arrays  40  shown in  FIGS. 1-3  are relied upon and referred to as support for the same or similar types of bristles  45  and bristle arrays  40  in the second embodiment. 
     Similar to the twisted wire tines described in the summary, in one illustrative version, each twisted wire spine  42  is fabricated from two runs of wire arranged side-by-side and twisted in order to form a double-helix. The two “runs” of stiff wire can be formed from a single wire folded over into “hairpin” configuration before twisting. During the fabrication process, and before the two parallel runs of wire (wire rod) are twisted to form the double helix, thinner and shorter wire strands are placed therebetween in an orientation generally perpendicular to the wire rods. The twisting of the larger wire rods forming the helix clamps down on the small wires and traps them between the twisted wire runs. These shorter and thinner wires constitute the bristles  45 . 
     Beyond the relatively straight central spine portion  43 , each spine first and second end  44   a  and  44   b  is contoured to extend substantially orthogonally to the central spine portion  43 . Each of the spine first and second ends  44   a  and  44   b  is fixedly secured to the brush-head block  20 B. Illustratively, the brush-head block  20 B is formed of plastic, and the spine first and second ends  44   a  and  44   b  are inserted into the plastic before the plastic hardens during fabrication. The brush head(s)  20  shown are, of course, entirely illustrative and non-limiting; their precise configuration is not central to the present invention. 
     Situated at least partially between the brush-head upper surface  22  and the mounting surface  90  of the brush-head mount  88  is a grill-cleaning implement plate  200  which, as indicated in the summary, may be interchangeably referred to as “implement plate  200 ” or “plate  200 .” The implement plate  200  extends longitudinally along the attachment plane P A  between plate back and front ends  210  and  230 . In  FIGS. 1-3 , two disparate plates are depicted. In the version of the first embodiment shown in  FIG. 1 , the plate front end  230  terminates at and defines a scraper blade  250  pitched at a non-zero blade angle ϕ B  relative to the attachment plane P A  such that a scraping edge  252  of the scraper blade  250  is situated at least one of (a) above and (b) forward of the brush-head block  20 B. 
     In the version of  FIGS. 2 and 3 , only the plate back end  210  carries grill-cleaning implements, and these implements are of the same type carried by the plate back end  210  in the version of the plate depicted in  FIG. 1 . More specifically, the plate back end  210  carries a plurality of grill-grate-abrading tines  220 , hereinafter alternatively referred to as tines  220 . Each tine  220  includes a tine base  222  by which it is retained by the plate back end  210 , and from which extends a tine shank  224  terminating in a tine tip  225  opposite the tine base  222 . Moreover, each tine  220  is pitched at a tine angle ϕ T  relative to the attachment plane P A  such that the tine tip  225  is situated at least one of (a) above and (b) rearward of the brush-head block  20 B. 
     Like the version of the first embodiment shown in  FIG. 1 , the second illustrative embodiment includes an implement plate  200  with a plate front end  230  that terminates in a scraper blade  250 . Distinguishably from the version of  FIG. 1 , however, in all illustrative instances depicted, the scraper blade  250  of the plate front end  230  in the second embodiment is not pitched or angled relative to the overall major lengthwise extent of the plate  200 . Moreover, the plate back end  210  of the second embodiment carries tines  220  that may be like those carried by the first embodiment. However, the plate back end  210  in the second embodiment is defined in part by two laterally spaced-apart ears  212  to each of which ears  212  there is attached a tine  220 . The ears  212  are angled relative to the overall major lengthwise extent of the plate  200  such that the tine  220  attached thereto is pitched at a first tine angle ϕ T  relative to the attachment plane P A , like the tines  220  of the version of  FIG. 1 , as well as a second non-zero tine angle θ T  relative to a vertical center plane P VC  oriented orthogonally to the attachment plane P A  and including the brush-head axis A BH  (See exploded view of  FIG. 9 ). Stated alternatively, the tines  220  are not only pitched relative to the attachment plane P A , they diverge with respect to one another as they extend away from the implement plate  200 , unlike the tines  220  of the first embodiment, which are all substantially parallel to one another. The reason for this mutual divergence of the tines  220  is more fully explained later in conjunction with  FIG. 13 . 
     The implement plate  200  is an element separate (i.e., distinct) from both the brush head  20  and the brush handle  70 . Accordingly, when the brush head  20  is selectively separated from the brush handle  70 , the plate  200  is freed—or can be freed—from between the brush-head upper surface  22  and the brush-head mount  88 , thereby enabling replacement of the plate  200  ( FIGS. 3 and 9 ). In the version of the plate  200  in  FIG. 1 , as well as the second embodiment in all illustrative instances depicted, the scraper blade  250  is an integral portion of the plate  200  as part of a unitary structure and, for this reason, the plate  200  may be referred to alternatively as a “scraper plate  200 ” in the specification and/or the claims. 
     The implement plate  200  is retained in each case—regardless of plate style—as part of the assembled grill brush  10  between the brush-head upper surface  22  and the mounting surface  90  of the brush-head mount  88 . Moreover, with the brush head  20  is fixed relative to the brush handle  70 , the plate  200  can be rotated about a plate-rotation axis A PR  between mutually opposed first and second angular orientations. Relative to the brush handle  70 , the first angular orientation is such that the plate front end  230  is disposed forward of the plate rear end  210 , while the second angular orientation is such that the plate front end  230  is disposed rearward of the plate rear end  210 . The plate rear and front ends  210  and  230  are on opposite sides of the plate-rotation axis A PR . In  FIGS. 1-3 , the plate  200  of the illustrative first embodiment is shown only in its first angular orientation, the second angular orientation being readily comprehensible without illustration. In  FIGS. 7-9 , the plate  200  of the illustrative second embodiment is shown only in its second angular orientation, the first angular orientation being readily comprehensible without illustration, particularly in light of the fact that the plate  200  of the first illustrative embodiment, while having a plate  200  of disparate configuration, it shown in its first angular orientation. 
     As shown in  FIGS. 3 and 6  relative to the first embodiment, and  FIGS. 8-10  relative to the second embodiment, the implement plate  200  has defined therethough a circular center hole  260  bounded by an annular inner edge  262 . In each of the first and second embodiments, a low-profile cylindrical island  50  protrudes upwardly from, and relative to other portions of, the brush-head upper surface  22 . The cylindrical island  50  is defined and bounded by an annular shoulder  52  configured for receipt into the circular center hole  260  of the plate  200 . The annular shoulder  52  and annular inner edge  262  defining the center hole  260  are configured to restrict the plate  200  to rotational displacement about the cylindrical island  50 . It will be readily appreciated that, when the plate  200  is mounted for rotation about the center island  50 , both the center island  50  and the circular center hole  260  are centered about the plate-rotation axis A PR . The cylindrical island  50  and center hole  260  essentially form a hub-and-axle relationship that facilitates rotation of the implement plate  200  about the cylindrical island  50  and the plate-rotation axis A PR .  FIGS. 9, 10, and 11  are particularly conducive to an understanding of this mechanical relationship.  FIG. 9  is an exploded view of the second embodiment showing the brush handle  70 , implement plate  200 , and brush head  20  separated from one another, but aligned along the plate-rotation axis A PR  as they are when assembled. In  FIG. 10 , the brush head  20  of the second embodiment is shown in isolation while, in  FIG. 11 , the brush head  20  of  FIG. 10  is shown with an implement plate  200  rotatably mounted thereon as it is when the grill brush  10  is fully assembled. 
     As the plate  200  is angularly displaced between the first and second angular orientations, the plate  200  rotates—while retained between the brush handle  70  and brush head  20 —along a plate rotation plane P PR  relative to which the plate-rotation axis A PR  extends perpendicularly. The plate rotation plane P PR  is one of (i) parallel to and (ii) identical with the attachment plane P A . In each of various embodiments, the rotatability of the plate  200  serves purposes later explained. 
     As previously indicated in the summary, once fastened to the brush-head mount  88 , the brush head  20  remains at a fixed angular orientation relative to the handle  70 . In the embodiment depicted in  FIGS. 1-3 , and seen best in the assembled cross-sectional view of  FIG. 2 , the brush head  20  is retained to the brush-head mount  88  of the handle  70  by a brush-head fastener  92 . An analogous view of the second embodiment is shown in  FIG. 8 . The brush-head fastener  92  is held captive in the assembled handle  70  and accessible from above the brush-head mount  88  to enable selective detachment of the brush head  20  from the handle  70 . Illustratively, the brush-head fastener  92  is an externally threaded fastener  93  with a keyed head  94  that facilitates rotation thereof by a complementarily-keyed tool such as a screwdriver. In the embodiments depicted, the brush head  20  is retained to the handle  70  by a single brush-head fastener  92  centrally located along the plate-rotation axis A PR , but alternative locations and fastener types are, or course, within the scope and contemplation of the invention.  FIGS. 8, 10, and 11  provide clear views of the internally threaded hole  54  defined within cylindrical island  50  for threadably receiving the brush-head fastener  92 . 
     In order to prevent the rotation of the brush head  20  relative to the handle  70  as the plate  200  is rotated, there is provided at least one off-center lug  96  that mechanically connects, and establishes mechanical interference between, the brush-head mount  88  and the brush head  20 . Illustratively, in the first embodiment, each off-center lug  96  is in the form of a pin or rod that extends into and between each of the brush-head mount  88  and the brush-head block  20 , such as in  FIGS. 2 and 5 . Alternatively, the off-center lug  96  could be integrally formed (e.g., molded) with one of the brush-head mount  88  and the brush-head block  20 B and received into a lug-receiving recess  26  defined in the other of the brush-head block  20 B and the brush-head mount  88 , as in shown most clearly in  FIGS. 8-11  of the second embodiment. Regardless of the lug configuration, it is important to various versions that the lug(s)  96  and lug-receiving recess(es)  26  facilitate selective separation of the brush head  20  from the brush-head mount  88 . 
     Among other advantages, removability of the brush head  20  facilities reversal of a brush head  20  on the brush-head mount  88 . As shown in  FIGS. 2 and 3 , as well as  FIGS. 8, 10 and 11 , the brush-head upper surface  22  has defined therein two lug-receiving recesses  26  on opposite sides of the plate-rotation axis A PR , with the plate-rotation axis A PR  situated mid-way between the lug-receiving recesses  26 . This arrangement allows the brush head  20  to be removed from the brush-head mount  88 , reversed, and then reinstalled and refastened onto the brush-head mount  88 . In the two alternative orientations of the brush head  20 , each off-center lug  96  protruding downwardly from the mounting surface  90  of the brush-head mount  88  is received into the opposite lug-receiving recess  26 . 
     In addition to being off center of the plate-rotation axis A PR , in at least the first embodiment, the off-center lug  96  extends through the plate  200 . In order to facilitate plate rotation unimpeded by the off-center lug  96 , there is defined through the plate  200  of the first embodiment an arcuate lug slot  270  radially displaced from, and centered about, the plate-rotation axis A PR  and the center hole  260 . As the plate  200  is rotated, the off-center lug  96  travels within the arcuate lug slot  270 . See  FIGS. 3, 5 and 6 . The arcuate lug slot  270  defines a circular arc that subtends an angle sufficiently large to accommodate plate rotation of at least 180°. In this way, the plate  200  can be alternatively positioned into first and second angular orientations that are 180° in opposition. Note that first embodiment requires the arcuate lug slot  270  because the off-center lug  96  passes through the implement plate  200  radially to the outside of the circular center hole  260  relative to the plate-rotation axis A PR . In the second embodiment, however, each off-center lug  96  extends downwardly from the mounting surface  90  of the brush-head mount  88  into a lug-receiving recess  26  defined within the cylindrical island  50  defined on the brush-head upper surface  22 . Because the cylindrical island  50  is within the annular inner edge  262  defining the center hole  260  in the plate  200 , there is no need for an arcuate slot  270 . 
     In applicable embodiments, the rotation of the implement plate  200  about the plate-rotation axis A PR  changes the relative positons of the scraper blade  250  and the tines  220  in order to facilitate their alternative use in disparate grill cleaning functions. More generally, the rotation changes the relative positions of the plate back and front ends  210  and  230 . For instance, when the implement plate  200  is in the first angular orientation with the plate front end  230  situated forward of the plate back end  210 , the scraper blade  250  is also situated forward of the tines  220 . Conversely, when the plate  200  is in the second angular orientation with the plate back end  210  forward of the plate front end  230 , the tines  220  are also forward of the scraper blade  250 . Relative to each of the scraper blade  250  and the tines  220 , the angular orientation in which it/they are forward of the other is regarded as the “deployed orientation,” while the opposite orientation is regarded as the “non-deployed orientation.” In all instances, unless otherwise noted, the relative terms “rearward of” and “forward of” are defined with respect to a user of the grill brush  10  but also, in more “self-contained” and universally applicable terms, with reference to the handle proximate end  82 , which is always regarded as rearward of the brush head  20 , irrespective of how a user is holding the grill brush  10  at any given time. 
     In order to use either one of the scraper blade  250  and the tines  220  in its deployed orientation to engage a grill surface to be cleaned, the brush handle  70  is inverted such that the brush head  20  is above the plate  200 , and the bristles  45  of the bristle array  40  are facing upwardly from—rather than downwardly toward—a grill grate to be cleaned. Although depicted in relation to a grill brush  10  of the second embodiment, an illustrative section of a grill grate  700  is shown in  FIG. 13  will assist in visualizing aspects of this discussion relative to both illustrative embodiments. When the scraper  250  is in its deployed orientation, it can be used to scrape grease, burned food, and other debris from the top surfaces  712  of the mutually parallel grill-grate bars  710  of the grill grate  700 , as well as other surfaces within the firebox (not shown) of a grill. The tines  220 , on the other hand, can be deployed to access and remove debris from the sides  714  of the grill-grate bars  710 , areas that would otherwise be inaccessible to the bristles of a conventional grill brush. Moreover, both embodiments depict specially-configured tines  220 , each with a tine tip  225  enlarged in cross-section relative to the tine shank  224 . The purpose and advantageous of this tine configuration is discussed with principal reference to  FIG. 13 , but also to  FIG. 11 . 
     The tines  220  shown in association with the second embodiment do not include bristles; they are rigid structures fabricated from a durable material such as high-temperature polymeric material or metal. In one version, the tines  220  are stainless steel. In addition to the outward mutual divergence of the tines  220  previously discussed, each tine  220  includes a rigid tine shank  224  that, in the versions depicted, is substantially cylindrical. Each tine tip  225  increases in diameter as a function of increased distance from the tine base  222 . Accordingly, as depicted, each tine tip  225  is substantially conical. As shown in  FIG. 13 , whereas a tine shank  224  may be used to run along and clean the sides  714  of grill-grate bars  710 , the grill brush  10  may be tilted while inverted, as in  FIG. 13 , to cause an enlarged—in this case, conical—tine tip  225  to run along and remove debris from the bottom surfaces  716  (undersides) of the grill-grate bars  710 . It will be appreciated that the mutual divergence of the tines  220  facilitates the insertion between grill-grate bars  710  of a single tine  220  at time, rendering the spacing between tines  220  and grill-grate bars  710  irrelevant. The inclusion of a tine  220  laterally disposed in each side of the implement plate  200  facilitates versatility, particularly relative to grill-grate bars  710  situated at the extreme right and left sides of the a grill firebox, for which oppositely-directed brush tilting and opposite tines  220  would be used. 
     As mentioned in the summary, in a broad aspect, the implement plate  200  could be rotated by direct contact between a user&#39;s fingers and the plate  200 . However, each of various embodiments includes mechanisms for rotating the plate  200  from above the brush-head mount  88 . Illustratively, these mechanisms include a rotary dial that is carried by and within the brush-head mount  88  of the handle  70 . Of course, embodiments including rotary dials could be variously configured. While each of the first and second illustrative embodiments includes a rotary dial, these dials and some of their specific functionalities differ. Accordingly, the specific mechanisms for rotating the implement plate  200  of each of the first and second embodiments are separately treated. Moreover, while the rotary dials of the two illustrative embodiments have several portions and components is common, disparate series of reference numbers are used to refer to these components to reduce the potential for confusion. More specifically, for the most part, components associated with the rotary dial of the first embodiment are referenced by numbers in the  400   s , while components associated with the rotary dial of the second embodiment are referenced by numbers in the  500   s.    
     Mechanisms for Rotating the Implement Plate of the First Embodiment 
     Relative to the first embodiment, mechanisms for selectively rotating the implement plate  200  from above the brush-head mount  88  are discussed with initial reference to  FIGS. 1-3 , and additional reference to  FIGS. 4-6 . As shown in various drawings, a rotary dial  400  is carried by the brush-head mount  88  of the handle distal end  84 . The rotary dial  400  has dial upper and lower surfaces  410  and  430 , the upper surface  410  including a fin  415  accessible to fingers of a user from above the brush-head mount  88 . As shown perhaps most clearly in the exploded view of  FIG. 4 , he rotary dial  400  is rotatable within a dial-retaining channel  460  defined within the brush-head mount  88  by a generally cylindrical channel wall  465 , in a manner and under conditions described below, in order to facilitate the rotation of the implement plate  200  between mutually opposed first and second angular orientations, such as those angular orientations previously described. The rotary dial  400  is rotatable about a dial-rotation axis A DR  that coincides with the plate-rotation axis A PR . In addition to being rotatable within the dial-retaining channel  460  under certain conditions, the rotary dial  400  is also—when in certain angular positions—linearly reciprocable within the dial-retaining channel  460  along the dial-rotation axis A DR  and between mutually opposed locked and unlocked positions. 
     With reference to  FIGS. 2 and 4 , the dial-retaining channel  460  accommodates the linear displacement of the rotary dial  400  “upward” and “downward” respectively away from and toward the brush head  20  situated below the brush-head mount  88 . The rotary dial  400  has an annular dial periphery  420  along which there is defined a projecting portion  421  that extends downwardly from the dial lower surface  430 . Extending radially inward—orthogonally to the dial-rotation axis A DR —from the projecting portion  421  is a lock protuberance  422 . The lock protuberance  422  in this case is a pin  422   p  that, during fabrication of the grill brush  10 , is inserted through a pin aperture  422   a  defined through the brush-head mount  88  and into the projecting portion  421  of the rotary dial  400 . The pin  422   p  constituting the lock protuberance  422  is inserted all the way through a side wall  88   SW  of the brush-head mount  88  and into the projecting portion  421  of the rotary dial  400  to a depth sufficient to allow the rotatory dial  400  to rotate within the brush-head mount  88 . 
     The installed lock protuberance  422  serves two purposes discussed with principal reference to  FIGS. 5 and 5A . A first purpose is to retain the rotary dial  400  within the brush-head mount  88  by extending under an annular inner step  462  defined within the dial-retaining channel  460 . Without the lock protuberance  422  installed, the rotary dial  400  is free to fall out of the top side of the brush-head mount  88 . As the rotary dial  400  is rotated within the dial-retaining channel  460 , the lock protuberance  422  rides along the annular inner step  462 , thereby retaining the rotary dial  400  within the dial-retaining channel  460 . A second purpose of the lock protuberance  422  relates to defining “locked” positions of the rotary dial  400  corresponding to the first and second angular orientations of the implement plate  200 . 
     The brush-head mount  88  has defined therein at least first and second protuberance-receiving recesses  472  and  474  diametrically opposed on opposite sides of the plate-rotation and dial rotation axes A PR  and A DR . In the illustrative embodiment depicted, and most particularly in  FIG. 5 , first and second protuberance-receiving recesses  472  and  474  are defined along the annular inner step  462 . A locked position of the rotary dial  400  is an “upward” position thereof in which the lock protuberance  422  is received within one of the first and second protuberance-receiving recesses  472  and  474 . In a locked position, the lock protuberance  422  is in an interference fit with one of the first and second protuberance-receiving recesses  472  and  474  in order to prevent—or at least provide resistance against—unintentional rotation of the rotary dial  400 . Conversely, an unlocked position of the rotary dial  400  is a “downward” position in which the lock protuberance  422  is out of interference fit with both of the first and second protuberance-receiving recesses  472  and  474  in order to permit desired rotation of the rotary dial  400 . The rotary dial  400  is mechanically linked to the implement plate  200  such that, as the rotary dial  400  is rotated about the dial-rotation axis A DR , the implement plate  200  rotates in unison therewith about the plate-rotation axis A PR . As shown in  FIGS. 5, 5A and 6 , a plate-rotation lug  424  extends downwardly from the projecting portion  421  of the rotary dial  400  and extends into a rotation-lug aperture  275  in the plate  200 , thereby establishing a mechanical link between the rotary dial  400  and the plate  200  by virtue of an interference fit. 
     The rotary dial  400  is normally biased toward a locked position. The mechanical biasing action in the present version of the first embodiment is achieved by a biasing member  435 . The illustrative biasing member  435  shown in  FIGS. 2 and 4  is in the form of a coiled spring  435   CS  carried within the brush-head mount  88  and helically disposed about the plate-rotation axis A PR . The biasing member  425  acts to mechanically bias the rotary dial  400  upwardly from below the rotary dial upper surface  410 . 
     Mechanisms for Rotating the Implement Plate of the Second Embodiment 
     As previously mentioned, there are similarities between the plate-rotation mechanisms of the first and second embodiments. Accordingly, because the discussion of these mechanisms relative to each embodiment is for the most part self-contained, there may be, in this regard, some redundancy in the discussion of the second embodiment relative to the first embodiment. 
     Relative to the second embodiment, mechanisms for selectively rotating the implement plate  200  from above the brush-head mount  88  are discussed with varying reference to all of the drawings depicting the second embodiment, beginning with  FIG. 7 . As shown in various drawings, a rotary dial  500  is carried by the brush-head mount  88  of the handle distal end  84 . The rotary dial  500  has dial upper and lower surfaces  510  and  530 . Extending between the dial upper and lower surfaces  510  and  530  is a dial side wall  540  that defines a generally cylindrical barrel  542 . Atop the barrel  542  is knob portion  544  enlarged and outwardly flanged relative to the barrel  542 , and including peripherally-disposed undulations  546  configured to enhance the grip of a user applying torque to rotate the rotary dial  500 . 
     The rotary dial  500  is rotatable within a dial-retaining channel  560  defined within the brush-head mount  88 , in a manner and under conditions described below, in order to facilitate the rotation of the implement plate  200  between mutually opposed first and second angular orientations, such as those angular orientations previously described. The dial-retaining channel is defined by a cylindrical channel surface  562  and a bottom channel surface  564 , the channel bottom surface  564  being opposite the mounting surface  90  of the brush-head mount  88 . The rotary dial  500  is rotatable about a dial-rotation axis A DR  that coincides with the plate-rotation axis A PR . Defined through the portion of the brush-head mount  88  including, on the interior, the bottom channel surface  564  and, on the exterior, the mounting surface  90  is an arcuate lug slot  566 , the purpose of which will later be explained. Unlike the rotary dial  400  of the first embodiment, the rotary dial  500  is not configured and retained for linear reciprocation within the dial-retaining channel  560 , but is restricted to rotary motion about the dial-rotation axis A DR . 
     Referring primarily to  FIG. 12 , and secondarily to  FIG. 9 , at least the barrel  542  of the rotary dial  500  is fabricated form a rigid, but resilient material that exhibits a memory property such that, when it flexed under a deformation force, it returns to an original, non-flexed shape when the deformation force is removed. As seen in the top portion of  FIG. 12 , the dial side wall  540  includes at least one (two, in this case) side-wall opening  540   O  that extends generally along the dial-rotation axis A DR . Each side-wall opening  540   O  defines an arcuate flexible tab  540   T  comprised of the rigid but resilient material from which the dial side wall  540  is fabricated. Each flexible tab  540   T  includes a lock protuberance  541  that, when the flexible tab  540   T  in a default non-flexed state, protrudes radially outward beyond the general counter and radius of the overall side wall  540  of the barrel  542 . 
     Referring to the lower portion of the  FIG. 12 , cylindrical channel surface  562  has defined therein a first protuberance-receiving recess  572 . A second protuberance-receiving recess  574  is not visible in  FIG. 12 , but its position is indicated by a dashed lead line. Additionally, both the first and second protuberance-receiving recess  572  and  574  are visible in the cross-sectional assembled view of  FIG. 7 . The first and second is protuberance-receiving recesses  572  and  574  diametrically opposed on opposite sides of the plate-rotation and dial rotation axes A PR  and A DR . 
     The rotary dial  500  and the dial-retaining channel  560  are cooperatively configured such that the rotary dial  500  snaps into place within the dial-retaining channel  560 . Moreover, when a lock protuberance  541  is aligned with first and second protuberance-receiving recesses  572  and  574 , and the flexible tab  540   T  in a default non-flexed state, that lock protuberance  541  occupies (protrudes into) whichever of the first and second protuberance-receiving recesses  572  and  574  with which it is aligned. When rotation of the rotary dial  500  out of a locked position is desired, a user must apply sufficient torque to cause each flexible tab  540   T  to flex radially inwardly toward the dial-rotation axis A DR  by an amount sufficient to free the lock protuberance  541  from the first or second protuberance-receiving recess  572  and  574  with which it is aligned. As the rotation of the rotary dial  500  continues, the lock protuberance  541  rides along the cylindrical channel surface  562  until it is aligned with the opposite one of the first and second protuberance-receiving recess  572  and  574  from which it was freed. Once this alignment occurs, the lock protuberance  541  will snap into place in the first or second protuberance-receiving recess  572  and  574  with which it is now aligned as the deformation force imparted by rotation is abated. At this point, the rotary dial  500  is locked in the opposite angular orientation. 
     With continued reference to  FIG. 12 , as previously mentioned, an arcuate lug slot  566  is defined through the lower portion of the dial-retaining channel  560 . A plate-rotation lug  534  extends downwardly from the dial lower surface  530 . When the rotary dial  500  is operatively seated within the dial-retaining channel  560 , the plate-rotation lug  534  extends through the arcuate lug slot  566  and protrude relative to the mounting surface  90 . As shown in  FIG. 11 , the implement plate  200  has defined therein a rotation-lug aperture  275  into which the plate-rotation lug  534  extends when the grill brush  10  is operatively assembled, thereby establishing a mechanical link between the rotary dial  500  and the plate  200  by virtue of an interference fit. It will be appreciated that the arcuate lug slot  566  and through which the plate-rotation lug  534  extends permits the rotary dial  500  and implement plate  200  to rotate between the first and second angular orientations. 
     The foregoing is considered to be illustrative of the principles of the invention. Furthermore, since modifications and changes to various aspects and implementations will occur to those skilled in the art without departing from the scope and spirit of the invention, it is to be understood that the foregoing does not limit the invention as expressed in the appended claims to the exact constructions, implementations and versions shown and described.