Patent ID: 7216575
Filing Date: 2007-05-15
Classification: B23D,E02F,E04G,Y10T

Abstract:
1. A heavy-duty demolition apparatus for attachment to the boom structure and hydraulic system of an excavator, the apparatus having a blade-stabilizing device, the apparatus having a forward end and a rearward end, the apparatus comprising: (a) a lower jaw and an upper jaw and pivot means interconnecting the jaws together, means for attachment to the boom structure of the excavator, the upper jaw having a first side and a second side, the lower jaw having a first mounting plate adjacent the first side and a second mounting plate adjacent the second side, the first and second mounting plates receiving the pivot means therebetween, and the upper jaw having means for attachment to the hydraulic system of the excavator for closing and opening the upper jaw relative to the lower jaw; the lower jaw and the upper jaw shearing a workpiece when the upper jaw is closed upon the lower jaw; and (b) a blade stabilizing device engaging the upper jaw to prevent the upper jaw from moving laterally with respect to the lower jaw and for reducing lateral stress on the upper jaw while shearing the workpiece, wherein the blade stabilizing device further comprises a first blade stabilizer attached to the first mounting plate and slidably engaging the upper jaw on the first side of the upper jaw, the first blade stabilizer further comprising a guide engaging the upper jaw, means for attaching the guide to the first mounting plate, and a shim for adjusting the clearance between the guide and the upper jaw.