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US 11,123,838 B1Granted
Sheetrock grinder power hand tool
OwnerJack Huffman Scarboroughinventor
Life of this patent
Estimating the term…
Abstract
A hand-held electric power tool for grinding sheetrock particularly adapted to making butt joints have a tapered or recessed juncture for filing with tape embedded with mud such that the joints are ready for painting or covering with wallpaper without being noticeable. The tool includes a grinding cylinder with barbs protruding therefrom which cut or grind the sheetrock edges without penetrating the full depth of the sheetrock or otherwise weakening or damaging the butt joint.
Claims13
A hand-held apparatus for improving sheetrock butt joints, comprising:
- a housing having a top, at least one side, and a bottom;
- a handle;
- a rotatable cylinder with surface protrusions extending outward from and below said bottom and wherein said protrusions are positioned on the cylinder in rows, forming a spiral pattern and wherein protrusions about one-eighth inch in length are positioned at and near the middle of the cylinder and protrusions about one-sixteenth inch in length are positioned toward the ends of the cylinder, wherein said protrusions are capable of cutting into sheetrock such that when the rotatable cylinder is turned or rotated the surface protrusions cut out a recess or channel in the sheetrock butt joint such that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless;
- a motor for turning the rotatable cylinder;
- a connector between said motor and said rotatable cylinder to facilitate said turning of said rotatable cylinder;
- and
- a depth adjuster for raising or lowering the rotatable cylinder such that the cylinder is at a level that when the rotatable cylinder is turned or rotated the surface protrusions cut out a recess or channel in the sheetrock butt joint such that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless;
- wherein in use the surface protrusions cut out a recess or channel in the sheetrock butt joint such that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless.
5 more elements
A hand-held apparatus for improving sheetrock butt joints, comprising:
- a housing having:
- (a) a top;
- (b) at least one side;
- (c) a flexible bottom with a first hole therein, and a (d) second hole for attachment of a container or bag for collection of sheetrock debris from operation of the apparatus;
- a handle;
- a rotatable cylinder comprising surface protrusions extending outward from and below said first hole in said bottom and wherein said protrusions comprise barbs for cutting into sheetrock, wherein the barbs are positioned on the cylinder in three rows, forming a spiral pattern and wherein barbs about one-eighth inch in length are positioned at and near the middle of the cylinder and barbs about one-sixteenth inch in length are positioned toward the ends of the cylinder, such that the surface protrusions cut out a recess or channel in the sheetrock butt joint so that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless;
- a motor for turning the rotatable cylinder;
- a connector between said motor and said rotatable cylinder to facilitate said turning of said rotatable cylinder;
- and
- a depth adjuster for raising or lowering the rotatable cylinder wherein the depth adjuster raises and lowers the bottom of the apparatus which in turn raises and lowers the cylinder such that the cylinder can be placed at a level that when the rotatable cylinder is turned or rotated the surface protrusions cut out a recess or channel in the sheetrock butt joint so that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless;
- and
- wherein in use the surface protrusions cut out a recess or channel in the sheetrock butt joint such that the butt joint resembles a tapered joint with beveled edges that can be finished smoothly with mud so as to appear seamless.
9 more elements
Dependencies are inferred from the claim text.