Patent ID: 7685909
Filing Date: 2010-03-30
Classification: E04D

Abstract:
1. A powered shingle ripper comprising a frame having a front and rear end; a handle connected to the frame at the rear for pushing the shingle ripper; a power source mounted on the frame, a power train, a rocker assembly mounted in the frame, said rocker assembly comprising a support member extending laterally across the frame, said support member having a serrated blade mounted thereon and said support member rotatably mounted in bearings on an axle at the front of the frame, said axle having right and left ends, said right and left ends eccentrically connected to right and left driven members, said right and left driven members journaled about an axis in the frame, said driven members connected by the power train to the power source for rotation of the axle about the axis of the driven members, at least one piston independent of the driven members connected to the support member, said piston reciprocated in a cylinder block pivotally mounted on the frame, said piston confining the support member to a specific arc of rotation on the axle.