Patent ID: 6948571
Filing Date: 2005-09-27
Classification: B25D

Abstract:
1. A powered hammer comprising: a hollow spindle including a forward tool holding end in which a tool can be releasably mounted for limited reciprocation; a piston mounted within an opposite rearward end of the spindle and operatively coupled to a motor for being reciprocably driven therein; a beatpiece located within the spindle between the piston and the tool for transmitting repeated impacts to the tool, the beatpiece having reduced diameter portions along its forward and rearward portions and an increased diameter mid-portion; and a two-part sleeve arrangement located within the spindle and having an increased internal diameter mid-portion for receiving the increased diameter mid-portion of the beatpiece and reduced internal diameter forward and rearward portions for guiding the forward and rearward ends respectively of the beatpiece in all working positions of the beatpiece; wherein the two-part sleeve arrangement includes a forward sleeve and a rearward sleeve, at least said forward sleeve being guided to enable axial play by and within the spindle.