BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to an implement scraper having a bucket coupler for retaining a scraper bar to a bucket, such as a conventional five-gallon bucket, with the scraper bar extending across a portion of the top of the bucket and forming a debris aperture for debris to fall from the scraper bar into the bottom of the bucket
Background
A bucket, such as a five-gallon bucket, is used in a wide array of functions including, painting, compound mixing, tile setting, grout application, flooring leveler application, drywall joint compound application, cleaning and the like. In many of these situations an implement is also used during the function or job. There are any number of implements that are used in conjunction with a bucket including mixing blades, drywall tools including a spackling blade, grouting tools such as a grout float, tile adhesive tools including a trowel and sponge and the like. Some of these implements may be used for spreading or applying contents within the bucket. Oftentimes, a person will insert the implement into the bucket to place material on the implement and then scrape off excess material on the side of the bucket. The material will oftentimes stick to the side of the bucket and dry. This dry material can then fall into the wet material in the bottom of the bucket and contaminate it. For example, tile adhesive may dry on the side of the bucket and fall back into the wet tile adhesive as chunks. When the wet material is retrieved from the bottom of the bucket and spread on a wall, the dry chunks both compromise the adhesion of the tile pieces and create inconsistencies in leveling from piece to piece.
SUMMARY OF THE INVENTION
The invention is directed to an implement scraper configured to detachably attach to a top rim of a bucket to provide a scraper bar that extends across the top opening of the bucket for scraping debris from a tool, such as a trowel. An exemplary implement scraper has a rim extension having a rim slot that extends over the top rim of the bucket and wherein the scraper bar is coupled proximal to the extended ends of the rim extension. A debris aperture is configured between the scraper bar and the rim extension to allow debris to fall therethrough down into the bucket. An exemplary implement scraper is detachably attachable to a bucket by a latch having a latch lock that engages with the bucket when the latch is pivoted down into a secure or locked configuration.
An exemplary implement scraper is configured to detachably attach to a top rim of a bucket by a rotating latch. The latch may be pivotably coupled in a latch slot in the latch flanges that extends down from the rim extension on the outside of the bucket. A latch may be configured in the latch slot by a latch pivot. A pivot extension may extend between the latch flanges and the latch to pivotably engage the latch in the latch slot. In an exemplary embodiment, the latch has latch extensions, cylindrical extensions that extend into apertures in the latch flanges to pivotably connect the latch in the latch slot, thereby enabling the latch to rotate in the latch slot. Note that the pivot may be reversed, wherein the latch has pivot apertures for receiving latch extensions extending from the latch flanges. In addition, a separate component, such as a pin may extend through the latch and into apertures of the latch flanges to form the pivot. The latch may have a handle that enables a user to rotate the latch from an insertion position, whereby the rim extension of the implement scraper can be slid down over the top rim of the bucket, to a closed position, wherein the latch lock is rotated to engage with the bucket rim and particularly with the rim flange of the bucket, a downward extension from the top rim of the bucket. The latch lock is secured between the rim flange and the exterior surface of the bucket to retain the implement scraper to the bucket. In an insertion position, the latch is rotated away from the rim slot of the implement scraper to enable the implement scraper to be slid down over the top rim of the bucket.
The latch may be retained by moving past a latch detent in the interior flange. This latch detent enables the latch lock to deflect the bucket into the detent to rotate past this detent. The latch is then retained by the bucket flexing back into position after being deflected. A latch detent may be a curved recessed area extending along the interior flange. The latch lock may have a latch flange, a shape that is configured to contour with the top rim or the rim flange of the bucket. A latch lock may extend in a planar direction or may be curved to match the contour of the bucket as it rotates past the detent. A latch may have a latch end that is curved and may have a radius of curvature that is substantially the same as the outside surface of the bucket; wherein the radius of curvature of the latch lock end of the latch is within about 30%, or preferably within about 20% and even more preferably within about 10% of the radius of curvature of the top rim or bucket outside surface.
An exemplary rim extension has a rim slot configured between an interior flange and an exterior flange. This rim slot may be curved and may be configured to extend along a radius of curvature that is substantially the same as the top rim of the bucket or the outside surface of the bucket, wherein the radius of curvature of the rim slot is within about 30%, or preferably within about 20% and even more preferably within about 10% of the radius of curvature of the top rim or bucket outside surface. When the rim slot has a radius of curvature that is substantially the same or closely matches that of the top rim or top of the bucket, the implement scraper may be more securely retained to the bucket prior to and after latching with the latch. The rim extension may extend around a portion of the top rim of the bucket, as defined by an extension angle, which may be about 180 degrees or less, about 90 degrees or less, about 75 degrees or less, about 60 degrees or less and any range between and including the extension angles provided. It is to be understood that an extension angle of 180 degrees would extend the scraper bar across the center of the bucket and this may interfere with access to the bucket contents and therefore an extension angle of 120 degrees and preferably 100 degrees or less is preferred. A rim extension may have a debris diverter, a beveled extension into the interior of the bucket. A debris diverter may extend from the top of the rim extension or from the interior flange of the rim extension and may form the rim extension boundary of the debris aperture; with the scrapper bar forming the rest of the boundary.
In an exemplary embodiment, the scraper bar is detachably attachable to the rim extension. The rim extension may have a slot for receiving the scraper bar therein and an interference fit with the scraper bar may secure the scraper bar in place. In an exemplary embodiment, the rim extension comprises a bar latch that is opened to receive the scraper bar and then closed to secure the scraper bar to the rim extension. An exemplary scraper bar may be an elongated member having terminated ends, a right and left end, or may be a scraper bar assembly having a scraper bar portion that is coupled with the rim coupler that is configured to extend into a bar slot within the rim extension. The rim coupler may extend in a radius of curvature to complement the radius of curvature of the rim extension and in particular a bar slot that extends in a radius of curvature. A scraper bar assembly may provide for a more robust retention of the scraper bar by the rim extension and bar slot as a much larger area is retained versus a scraper bar having terminated ends that extend into a bar slot. An exemplary scraper bar assembly may be a monolith formed from a single part such as through injection molding, cutting and stamping a single piece of material and the like. An exemplary scraper bar or scraper bar assembly may be affixed to the rim extension, such that the rim extension and scraper bar assembly are not detachably attached. A scraper bar assembly may be a separate part that is affixed to the rim extension such as through molding, or the scraper bar may be an integral part of the rim extension, wherein the two components are a single molded part, for example.
An exemplary scraper bar may have a planar bar extension portion and a beveled portion extending therefrom. The beveled portion may extend down into a bucket when the bucket scraper apparatus is detachably attached to the top rim of the bucket. A beveled portion may extend an angle from the planar portion a beveled angle of about 15 degrees or more, about 20 degrees or more, about 40 degrees or more, such as about 25 degrees, and any range between and including the beveled angles provided.
In an exemplary embodiment, the implement scraper comprises a magnetic coupler configured to retain a magnetic implement, an implement that can be retained by a magnet such as a steel implement, to the implement scraper. A magnetic coupler may comprise one or more magnets that are configured on the top of the rim extension.
An exemplary implement scraper may be configured to fit on a conventional five-gallon bucket, which has a rim and an outer rim diameter of about 11⅞ inches, or 30.16 cm. A bucket may be any size, however, and may have a top rim diameter of about 9 inches (22.86 cm) or more, about 12 inches (30.48 cm) or more, about 15 inches (38.10 cm) or more, about 20 inches (50.80 cm) or more and any range between and including the diameter values provided. The implement scraper may be sized to fit over a bucket of a particular rim diameter and the rim slot and latch lock or latch lock end may be curved or have a suitable radius of curvature for the rim diameter or outer surface diameter of the bucket.
A scraper bar may have a planar surface thereby producing a sharp edge at the edge of the planar surface for removing debris from an implement. The plane of the planar surface of scraper bar may extend horizontally, or vertically. In a vertical orientation, the scraper bar may be more resistant to downward force due to moment of inertia geometry factors.
The summary is provided as a general introduction to some of the embodiments of the invention, and is not intended to be limiting. Additional example embodiments including variations and alternative configurations of the invention are provided herein.
BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.
FIG. 1 shows a perspective view of an exemplary implement scraper having a bucket coupler for detachably attaching the implement scraper to the top rim of the bucket with the scraper bar extending across a portion of the top opening of the bucket and forming a debris aperture between the scraper blade and the rim extension to allow the debris to fall therethrough down into the bucket and a magnetic coupler for retaining a scraper implement, having metallic portions, such as the scraper blade to the implement scraper.
FIG. 2 shows a perspective view of the exemplary implement scraper having a scraper implement retained to the implement scraper by the magnetic coupler.
FIG. 3 shows a top perspective view of a scraper implement retained to the implement scraper by the magnetic coupler
FIG. 4 shows a side cross sectional view of an exemplary implement scraper and a scraper implement scraping debris off of the scraper blade along the scraper bar and debris falling off of the scraper bar and into the bucket.
FIG. 5 shows a perspective view of an exemplary implement scraper.
FIG. 6 shows an exploded view of an exemplary implement scraper.
FIG. 7 shows a top view of an exemplary implement scraper.
FIG. 8 shows a back view of an exemplary implement scraper.
FIG. 9 shows a side view of an exemplary implement scraper.
FIG. 10 shows a bottom view of an exemplary implement scraper.
FIG. 11 shows a top view of an exemplary implement scraper and the debris aperture formed between the scraper bar and the inner surface of the wall of the bucket or the interior flange of the rim extension.
FIG. 12 shows a side cross sectional view of an exemplary implement scraper configured on the top rim of a bucket with the latch in an open configuration.
FIG. 13 shows a side cross sectional view of an exemplary implement scraper configured on the top rim of a bucket with the latch in a down and secured or latched configuration.
FIG. 14 shows a side view of an exemplary implement scraper configured on the top rim of a bucket with the latch in a down and secured or latched configuration.
FIG. 15 shows a cross sectional view along line 15-15 of FIG. 14, of the implement scraper, not including the scraper bar, configured on the top rim of a bucket with the latch in a down and secured or latched configuration.
FIG. 16 shows a side view of an exemplary bucket coupler portion of an implement scraper.
FIG. 17 shows a front view of an exemplary latch having a radius of curvature that substantially matches the diameter of the bucket it is configured for attachment to.
FIG. 18 shows a perspective view of an exemplary latch having a radius of curvature that substantially matches the diameter of the bucket it is configured for attachment to.
FIG. 19 shows a perspective view of an exemplary implement scraper having a bucket coupler for detachably attaching the implement scraper to the top rim of the bucket with the scraper bar extending across a portion of the top opening of the bucket and forming a debris aperture between the scraper blade and the rim extension to allow the debris to fall therethrough down into the bucket and a magnetic coupler for retaining a scraper implement, having metallic portions, such as the scraper blade of the implement scraper.
FIG. 20 shows a perspective view of the exemplary implement scraper having a scraper implement retained to the implement scraper by the magnetic coupler.
FIG. 21 shows a top perspective view of a scraper implement positioned against the scraper bar.
FIG. 22 shows a side cross sectional view of an exemplary implement scraper and a scraper implement scraping debris off of the scraper blade along the scraper bar and beveled portion of the scraper bar and debris falling off of the scraper bar into the bucket.
FIG. 23 shows a perspective view of an exemplary implement scraper.
FIG. 24 shows an exploded view of an exemplary implement scraper having a scraper bar assembly with a rim coupler that extends a radius of curvature for insertion into a bar slot of the rim extension.
FIG. 25 shows a top view of an exemplary implement scraper.
FIG. 26 shows a back view of an exemplary implement scraper.
FIG. 27 shows a side view of an exemplary implement scraper.
FIG. 28 shows a bottom view of an exemplary implement scraper.
FIG. 29 shows a top view of an exemplary implement scraper and the debris aperture formed between the scraper bar and the inner surface of the wall of the bucket or the interior flange of the rim extension.
FIG. 30 shows a side cross sectional view of an exemplary implement scraper configured on the top rim of a bucket with the latch in an open configuration.
FIG. 31 shows a side cross sectional view of an exemplary implement scraper configured on the top rim of a bucket with the latch in a down and secured or latched configuration.
Corresponding reference characters indicate corresponding parts throughout the several views of the figures. The figures represent an illustration of some of the embodiments of the present invention and are not to be construed as limiting the scope of the invention in any manner. Further, the figures are not necessarily to scale, some features may be exaggerated to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
As used herein, the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also, uses of “a” or “an” are employed to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
Certain exemplary embodiments of the present invention are described herein and are illustrated in the accompanying figures. The embodiments described are only for purposes of illustrating the present invention and should not be interpreted as limiting the scope of the invention. Other embodiments of the invention, and certain modifications, combinations and improvements of the described embodiments, will occur to those skilled in the art and all such alternate embodiments, combinations, modifications, improvements are within the scope of the present invention.
As shown in FIG. 1, an exemplary implement scraper 17 has a bucket coupler 14 for detachably attaching the implement scraper to the bucket 20. The bucket coupler has a latch 60 with a latch handle 64 that rotates about a latch pivot 62 to secure the latch lock 66 on the latch end 65 against the bucket, such as against the top rim 24 of the bucket. The implement scraper is configured with the scraper bar 70 extending across the top opening 21 of the bucket. The scraper extends from the right end 73 coupled with right rim extension to the left end 71 coupled with the left rim extension 74 and forms a debris aperture 75 between the scraper blade and the interior surface 27 of the wall 25 of the bucket 20 to allow the debris to fall therethrough, down into the bucket. The rim extension has an interior flange configured down along the interior of the bucket and an exterior flange 52 configured down over the exterior of the top rim of the bucket. This rim extension forms a rim slot that extends over the top rim of the bucket. The implement scraper is configured with magnetic coupler 77 having magnets 78 for retaining a scraper implement having metallic portions, such as a metallic trowel, to the implement scraper.
Referring now to FIGS. 2 and 3, a scraper implement 97 is secured to the implement scraper 17 by the magnetic coupler 77. The scraper blade 98 of the scraper implement is metal, a magnetic implement, and is retained to the magnets 78 of the magnetic coupler. A worker may place a trowel on top of the magnetic coupler of the implement scraper while performing other tasks associated with the job. This protects the trowel from falling into the mixed compound in the bucket. Also shown in FIGS. 2 and 3 is the rim extension having a rim slot 54 formed by the interior flange 50, the rim extension top 53 and the exterior flange 52. The rim slot is configured with a radius of curvature to enable the implement scraper to be placed and retained over the top rim of the bucket.
As shown in FIG. 4, a scraper implement 97 is scraping debris 99 off of the scraper blade 98 along the scraper bar 70 and debris is falling off of the scraper bar and into the bucket 20. Debris may be scraped such that it falls between the scraper bar and the top opening 21 of the bucket and may fall through the debris aperture 75 formed between the scraper bar 70 and the rim extension 72 of the bucket coupler 17.
Referring to FIGS. 5 to 11, an exemplary implement scraper 17 has a rim extension 72 that is coupled to a top rim of a bucket. A left rim extension 74 extends circumferentially to the left from the bucket coupler 14 and magnetic coupler 77 and a right rim extension 76 extends to the right from the bucket coupler and magnetic coupler. A magnetic coupler 77 is configured on the top of the implement scraper, and has a pair of magnets 78 for retaining a scraper implement, or any other magnetic implement. The bucket coupler 14 has a latch 60 configured to detachably attach the implement scraper to the bucket. The latch handle 64 is configured to rotate about a latch pivot 62 to bring the latch lock end 65, and the latch lock 66 into engagement with the bucket, such as against the top rim of the bucket. The handle end 63 is rotated down to engage the latch lock with the bucket rim. The latch handle pivots within a latch slot 106 formed by the two opposing latch flanges extending down from the exterior flange. As shown in FIG. 6, the latch pivot 62, employs pivot extensions extending into latch pivot apertures 69 in the latch flanges 102. The scraper bar 70 is configured to extend across a top opening of a bucket and has a left end 71 and a right end 73 that are coupled proximal to the ends of the left rim extension and right rim extension, respectively. As shown in FIGS. 5, 7, 10, and 11, the scraper bar forms a debris aperture 75 between the scraper bar and the inside surface of the top extension 79 and the interior surface 27 of the wall 25 of the bucket. As shown in FIG. 11, the scraper blade extends an extension angle 23 around the outer circumference of the top rim 24 of the bucket. The extension angle shown is about 60 degrees.
Referring now to FIGS. 12 and 13, an exemplary implement scraper 17 is configured on the top rim 24 of a bucket 20 with the rim slot 54 configured over the top rim of the bucket. In FIG. 12, the latch 60 is in an open configuration with the handle end 63 of the latch handle 64 rotated up and the latch lock end 65 and latch lock 66 rotated down away from the bucket. In FIG. 13, the latch handle 64 of the latch 60 is rotated about the latch pivot 62 to bring the latch lock end 65 and latch lock 66 into engagement with the top rim 24 of the bucket 20.
As shown in FIG. 14, an exemplary implement scraper 17 is configured on the top rim 24 of a bucket 20 with the latch in a down and secured or latched configuration.
As shown in FIG. 15, the implement scraper 17 is configured on the top rim 24 of a bucket 20, with the latch 60 in a down and secured or latched configuration. The rim slot 54 is a slot in the implement scraper that extends over the top rim of the bucket from the interior surface 27 to the exterior surface 29.
Referring now to FIG. 16, the latch 60 is configured to rotate from an open position to a closed or locked position. The rim slot 54 is slightly wider than the top rim of the bucket and the width of the rim slot at the detent 56 is wider than the width of the rim slot above and below the detent. This detent allows the bucket wall to flex into the detent as the latch lock end of the latch handle 64 rotates up along the detent to provide a positive engagement past the detent to secure the bucket coupler 14 and implement scraper to the bucket. The detent slot width 59 is greater than the width of the rim slot 54 above and below the detent, as shown.
Referring now to FIGS. 17 and 18, an exemplary latch 60 has a latch lock end 65 that has a radius of curvature 67 that may correspond substantially, within about 30% and preferably within about 20%, and more preferably within about 10%, of a radius of curvature of the outside surface of a bucket or the bucket rim, to enable the latch lock to slide along the outside surface of the bucket and past the latch detent in the interior flange, as shown in FIG. 16. As shown in FIG. 18 the latch pivot includes a pivot aperture in the latch handle 64. Also, the latch lock end 65 comprises a latch lock 66 and latch flange 68, configured to abut with a downward extension of the top rim of the bucket.
As shown in FIG. 19, an exemplary implement scraper 17 has a bucket coupler 14 for detachably attaching the implement scraper to the bucket 20. The bucket coupler has a latch 60 with a latch handle 64 that rotates about a latch pivot 62 to secure the latch lock 66 on the latch end 65 against the bucket, such as against the top rim 24 of the bucket. The implement scraper is configured with the scraper bar 70 extending across the top opening 21 of the bucket. The scraper bar is part of the scraper bar assembly that includes rim coupler 720 that is retained in a rim slot within the rim extension 72. The scraper bar extends from the right end 73 coupled with right rim extension to the left end 71 coupled with the left rim extension 74 and forms a debris aperture 75 between the scraper blade and the interior surface 27 of the wall 25 of the bucket 20 to allow the debris to fall therethrough, down into the bucket. The rim extension has a debris diverter, a downward beveled portion of the inside surface 79 of the rim extension or an extension from the rim extension 72. This beveled debris diverter may funnel debris into the inside of the bucket. The rim extension has an interior flange configured down along the interior of the bucket and an exterior flange 52 configured down over the exterior of the top rim 24 of the bucket. This rim extension forms a rim slot that extends over the top 22 or top rim of the bucket. The implement scraper is configured with magnetic coupler 77 having magnets 78 for retaining a scraper implement having metallic portions, such as a metallic trowel, to the implement scraper.
Referring now to FIGS. 20 and 21, a scraper implement 97 may be secured to the implement scraper 17 by the magnetic coupler 77. The scraper blade 98 of the scraper implement is metal, a magnetic implement, and is retained to the magnets 78 of the magnetic coupler. A worker may place a trowel on top of the magnetic coupler of the implement scraper while performing other tasks associated with the job. This protects the trowel from falling into the mixed compound in the bucket. Also shown in FIGS. 20 and 21 is the rim extension 72 having a rim slot 54 formed by the interior flange 50, the rim extension top 53 and the exterior flange 52. The rim slot is configured with a radius of curvature to enable the implement scraper to be placed and retained over the top rim of the bucket. The scraper bar assembly 700 is a monolithic component with the scraper bar 70 being integrally formed with the rim coupler that is retained within a bar slot in the rim extension 72. The scraper bar has a beveled portion 702 that extends downward from the planar bar extension 701, which may extend substantially horizontally; when the bucket is on a horizontal surface.
As shown in FIG. 22, a scraper implement 97 is scraping debris 99 off of the scraper blade 98 along the scraper bar 70 and the beveled portion 702 of the scraper bar and debris is falling off of the scraper bar and into the bucket 20. Debris may be scraped such that it falls between the scraper bar and the top opening 21 of the bucket and may fall through the debris aperture 75 formed between the scraper bar 70 and the rim extension 72 of the bucket coupler 17. Also shown in FIG. 22, the scraper bar assembly 700 is secured to the rim extension 72 with the rim coupler 720 configured in the bar slot 721 of the rim coupler.
Referring to FIGS. 23 to 29, an exemplary implement scraper 17 has a rim extension 72 that is coupled to a top rim of a bucket. A left rim extension 74 extends circumferentially to the left from the bucket coupler 14 and magnetic coupler 77, and a right rim extension 76 extends to the right from the bucket coupler and magnetic coupler. A magnetic coupler 77 is configured on the top of the implement scraper, and has a pair of magnets 78 for retaining a scraper implement, or any other magnetic implement. The bucket coupler 14 has a latch 60 configured to detachably attach the implement scraper to the bucket. The latch handle 64 is configured to rotate about a latch pivot 62 to bring the latch lock end 65, and the latch lock 66 into engagement with the bucket, such as against the top rim of the bucket. The handle end 63 is rotated down to engage the latch lock with the bucket rim. The latch handle pivots within a latch slot 106 formed by the two opposing latch flanges extending down from the exterior flange. As shown in FIG. 24, the latch pivot 62, employs pivot extensions extending into latch pivot apertures 69 in the latch flanges 102.
Also shown best in FIG. 24, the scraper bar assembly 700 is a monolithic component having the scraper bar 70 formed with the rim coupler 720. The scraper bar 70 is configured to extend across a top opening of a bucket and has a left end 71 and a right end 73 that are coupled with the rim coupler. The rim coupler extends a radius of curvature and is configured to slide into a bar slot within the rim extension 72. As shown in FIGS. 23, 25, 28 and 29, the scraper bar forms a debris aperture 75 between the scraper bar and the inside surface of the top extension 79 and the interior surface 27 of the wall 25 of the bucket. As shown in FIG. 29, the scraper blade extends an extension angle 23 around the outer circumference of the top rim 24 of the bucket. The extension angle shown is about 60 degrees.
Referring now to FIGS. 30 and 31, an exemplary implement scraper 17 is configured on the top rim 24 of a bucket 20 with the rim slot 54 configured over the top rim of the bucket. The scraper bar assembly 700 is detachably attached to the rim extension 72 with the rim coupler 720 configured in the bar slot. In FIG. 30, the latch 60 is in an open configuration with the handle end 63 of the latch handle 64 rotated up and the latch lock end 65 and latch lock 66 rotated down away from the bucket. In FIG. 31, the latch handle 64 of the latch 60 is rotated about the latch pivot 62 to bring the latch lock end 65 and latch lock 66 into engagement with the top rim 24 of the bucket 20.
It will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention without departing from the scope of the invention. Specific embodiments, features and elements described herein may be modified, and/or combined in any suitable manner. Thus, it is intended that the present invention cover the modifications, combinations and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Patent Grant
11623470
