Patent ID: 7134508
Filing Date: 2006-11-14
Classification: B23D,B25F

Abstract:
1. A rotary to reciprocating motion conversion attachment for a power rotary hand tool of the type which has a tool housing with a nose portion and an associated rotatable output shaft, said attachment comprising: a housing having a mounting end portion configured to be attached to the hand tool; a rotary drive train located within said housing configured to be operatively connected to the output shaft of the hand tool, said drive train having and driving a generally rotatable cylindrical barrel cam, said barrel cam having a cam groove formed in and extending around the outside of the barrel cam, the configuration of the cam groove defining a generally sinusoidal path around the circumference thereof, said path beginning at a first end point and reaching a second end point during less than 180 degrees of rotation and returning to said first end point for the remainder of 360 degrees of rotation, said rotary drive train comprising a planetary gear set adjacent said mounting end portion, said gear set having an input shaft and an output shaft, said output shaft being operatively connected to said barrel cam so that they rotate together; a cam follower assembly located in said housing and having a frame slideable along a frame support in a direction generally parallel to said cam axis, said assembly having a cam follower for engaging said cam groove and moving said frame in a reciprocating manner as said barrel cam is rotated; said cam follower assembly having an implement holder attached to said frame for holding an implement.