Attachment for a percussive tool
AssigneePower Design, Inc.
InventorJames Kilpatrick
Life of this patent
Estimating the term…
Abstract
An attachment for a percussive tool comprises a plurality of parallel rows of teeth (10) formed along the edges of planar chisel blades (9) arranged to form a shape having rotational symmetry. The attachment is connected to a percussive tool and placed in contact with a wall (12). The tool causes percussive action of the attachment such that the chisel blades (9) form a plurality of parallel grooves (13) and ridges in the wall. The tool and attachment are then rotated through an angle and placed in contact with the wall (12) in a position overlaying the plurality of parallel grooves (13). This breaks up the ridges forming a hole (15) of a substantially uniform depth. The attachment is used to produce square holes suitable for installing wall boxes for light switches or power points.
Claims24
An attachment for a percussive tool comprising:
- means for connecting the attachment to a percussive tool;
- and
- a plurality of rows of teeth arranged substantially parallel to and spaced apart from each other to form a shape substantially having rotational symmetry about a central axis, wherein each tooth is formed in one of said rows and wherein each row of teeth is formed along the edge of a planar chisel blade.
A method for forming a hole in a wall comprising:
- providing an attachment for a percussive tool, said attachment having a plurality of rows of teeth arranged substantially parallel to and spaced apart from each other to form a shape substantially having rotational symmetry about a central axis;
- connecting the attachment to a percussive tool;
- placing the attachment in contact with the wall and causing percussive action of the attachment such that the rows of teeth form a plurality of parallel grooves and ridges in the wall;
- and
- rotating the attachment through an angle about the central axis and placing the attachment in contact with the wall in a position overlaying the plurality of parallel grooves and ridges and causing percussive action of the attachment to break up the ridges and form a hole of a substantially uniform depth.
Dependencies are inferred from the claim text.