Patent ID: 8549762
Filing Date: 2013-10-08
Classification: B23D

Abstract:
1. A drive apparatus for a reciprocating tool, comprising; a housing; an elongated plunger located in said housing for reciprocating motion, said plunger having a front end portion for attaching a cutting blade thereto; a rotatable drive shaft assembly located in said housing, said drive shaft assembly including a drive shaft and a connection arm operatively and directly connected to a rear portion of said plunger, wherein a rotation of said drive shaft causes said connection arm to move in a reciprocating motion along a lengthwise direction of said connection arm to apply a force on said plunger to thereby reciprocate said plunger generally in a lengthwise direction of said plunger during alternating cutting and return strokes; and a rotary joint rocker mechanism supported in said housing and operatively connected to said plunger and said drive shaft assembly so that a rotation of said drive shaft assembly produces a reciprocating motion of said plunger; said rotary joint rocker mechanism including;