Patent ID: 7654338

Claim:
A powered hammer comprising: a housing; a tool holder coupled to the housing and configured to hold a tool; a motor within the housing; a piston slideably mounted within the housing; a drive mechanism that converts rotary output of the motor into a reciprocating motion of the piston; a ram slideably mounted forward of the piston and that is reciprocatingly driven by the piston; a beat piece support mounted in the housing forward of the ram; a beat piece slideably supported by the beat piece support, the beat piece being repetitively struck by the ram and that in turn repetitively strikes an end of a tool when the tool is held in the tool holder to transfer the momentum of the ram to a tool, wherein the beat piece support includes a seal that is slidingly engaged by the beat piece, the seal comprising an absorbent material; and wherein the best piece comprises a radial bulge that is engaged by the seal.