Patent ID: 7513317
Filing Date: 2009-04-07
Classification: B25D,B25F

Abstract:
1. An impact tool comprising: a housing: a motor having a rotation shaft, the motor being accommodated in the housing and generating a rotational drive force when powered; a reciprocating motion converter configured to convert the rotational drive force of the motor to a reciprocating motion; a tool bit attached to one end portion of the housing and driven by the reciprocating motion of the reciprocating motion converter; a handle positioned at another end portion of the housing; and a counterweight mechanism operable to reduce vibrations generated attendant to the reciprocating motion, the counterweight mechanism being disposed in a section of the housing which is separated by a wall from the handle; wherein the counterweight mechanism includes a counterweight supported at opposite ends thereof and extending in a direction transverse to a direction of the reciprocating motion.