Patent ID: 8316960
Filing Date: 2012-11-27
Classification: B28D,E01C,E02D,E04G

Abstract:
1. A hammer assembly, including: a housing with at least one opening; a hammer formed as a substantially elongated unitary weight formed with integral first and second tool ends located at opposing longitudinal distal ends of the weight, said hammer including at least two protrusions, said hammer received in the housing in a first orientation; and a drive mechanism including a dog attached to a loop of chain extending about at least two sprockets, at least one sprocket being connected to a motor and rotatable to drive said chain and attached dog, the dog engaging with said protrusions on the hammer during said rotation to reciprocate the hammer by driving the hammer in, wherein the hammer is capable of being removed from the housing and re-inserted in the housing in a second orientation with said first and second tool ends being reversed.