Patent ID: 6634107
Filing Date: 2003-10-21
Classification: B23D,Y10T

Abstract:
A saber saw comprising:a housing for accommodating a motor; a driven shaft rotatably supported by said housing and rotated by said motor; a plunger capable of reciprocative motion with respect to said housing and having a front end to which a saw blade is attached; a first motion converting mechanism interposed between said driven shaft and said plunger for converting rotational motion of said driven shaft into the reciprocative motion of said plunger; a counterweight causing reciprocative motion with respect to said housing; a second motion converting mechanism interposed between said driven shaft and said counterweight for converting the rotational motion of said driven shaft into the reciprocative motion of said counterweight; and a pair of opposing tracks formed on said counterweight so as to extend in a direction substantially parallel to a reciprocating direction of said plunger, so that guide means of said plunger reciprocates along one of said opposing tracks formed on said counterweight while maintaining a clearance between said guide means and the other of said opposing tracks.