Patent ID: 8360167

Claim:
A bushing assembly for a hydraulic hammer including a housing having a distal end defining an opening and a tool having a proximal section and a distal section projecting from the housing through the opening, the bushing assembly comprising: a bushing positioned adjacent the housing distal end, the bushing having an outer surface, an inner guide surface sized to slidably receive the tool proximal section, and a distal end; and a composite seal including: an exterior cover having a proximal end releasably coupled to the bushing, a distal end projecting from the distal end of the bushing, and a neck disposed between the exterior cover proximal end and the exterior cover distal end, in which the neck and the bushing outer surface are configured to form a relief gap therebetween; and an interior seal having a base disposed in the exterior cover recess and a sealing arm projecting inwardly from the base, the sealing arm being configured to sealingly engage the tool.