Patent ID: 8122972
Filing Date: 2012-02-28
Classification: B25D

Abstract:
1. A drive mechanism for a power tool having a housing and a motor disposed in the housing and having an output shaft for actuating a working member of the power tool, the drive mechanism comprising: a reciprocating member adapted to be slidably mounted relative to said housing and adapted to be caused to execute reciprocating movement relative to said housing, wherein said reciprocating member is adapted to slidably receive a first end of a crank pin; a crank plate adapted to be caused to rotate by means of said motor and having a recess adapted to receive a second end of said crank pin such that rotation of said crank plate causes reciprocation of said reciprocating member; and a collar member disposed between said first and second ends of said crank pin, wherein said collar member is adapted to prevent removal of said second end from said recess.