Patent ID: 8568204

Claim:
A material removing apparatus comprising a power-driven output shaft arranged to oscillate about a predetermined axis, a tool and a fastener attaching said tool to the output shaft, the fastener having a thickness, said tool comprising: an elongated member having a rearward generally flat first section lying in a first plane, with a mounting opening being configured to be mounted on said output shaft with the fastener so that the first plane is at least substantially normal to said predetermined axis; and a forward generally flat second section lying in a second plane, said second section being remote from said first section and including at least one at least substantially straight elongated cutting edge also lying in the second plane, said at least one at least substantially straight elongated cutting edge comprising two adjoining straight sections disposed at an acute angle with respect to a line normal to a longitudinal axis of the tool, each of said two adjoining straight sections comprising a plurality of teeth disposed in substantially a straight line; wherein said elongated member comprises a step of finite length at least equal to the thickness of the fastener intermediate said first and second sections thereof: wherein said step of finite length is configured so that the first and second planes, and consequently said first and second sections of said elongated member, extend substantially parallel to each other, so that the second plane is further from the manually driven apparatus than the first plane, whereby the second plane is closer to the workpiece during use of the apparatus than is the first plane.