Abstract: The present invention provides a multi-mode drive mechanism. The multi-mode drive mechanism may be employed, for example, in a power tool, for driving a chuck supporting an end effector, such as a drill bit or spiral cut bit, for acting on a work surface. For example, when employed in a power tool, the mechanism can generate rotating, reciprocating, or simultaneous rotating and reciprocating motion. Cutting with simultaneous rotational and reciprocating motion lessens the potential for undesired walking or wandering of the cutting bit by actively removing debris from the cut. Additionally, multi-mode drive mechanisms provide increased functionality in a single tool to accommodate a variety of situations and materials. One aspect of the invention provides a multi-mode drive mechanism including: an input shaft, a reciprocating assembly, an output shaft, a reciprocating block, and a shift collar. The input shaft terminates in an input external spur gear.

Abstract: The present invention provides a multi-mode drive mechanism. The multi-mode drive mechanism may be employed, for example, in a power tool, for driving a chuck supporting an end effector, such as a drill bit or spiral cut bit, for acting on a work surface. For example, when employed in a power tool, the mechanism can generate rotating, reciprocating, or simultaneous rotating and reciprocating motion. Cutting with simultaneous rotational and reciprocating motion lessens the potential for undesired walking or wandering of the cutting bit by actively removing debris from the cut. Additionally, multi-mode drive mechanisms provide increased functionality in a single tool to accommodate a variety of situations and materials. One aspect of the invention provides a multi-mode drive mechanism including: an input shaft, a reciprocating assembly, an output shaft, a reciprocating block, and a shift collar. The input shaft terminates in an input external spur gear.

Abstract: An abrading blade assembly having a detachable cutting section. The abrading blade assembly includes a body having a shank portion configured for attachment to a conventional reciprocating saw and a removably attachable cutting section having a cutting edge extending along its lower end. The cutting edge is oriented to be substantially parallel to a line of reciprocation defined by the reciprocal motion of the saw's reciprocating spindle. The blade assembly's cutting edge is spaced from the line of reciprocation a distance sufficient to permit clearance of the saw with the work surface while the blade is being used to abrade in a direction substantially parallel to the line of reciprocation along the work surface.

Abstract: An abrading blade having a shank portion configured for attachment to a conventional reciprocating saw and a cutting edge extending along its lower end. The cutting edge is oriented to be substantially parallel to a line of reciprocation defined by the reciprocal motion of the saw's reciprocating spindle. The blade's cutting edge is spaced from the line of reciprocation a distance sufficient to permit clearance of the saw with the work surface while the blade is being used to abrade in a direction substantially parallel to the line of reciprocation along the work surface.