74187458
Jul 22, 1991
May 11, 1993
computer-controlled hydraulic lifting/lowering units having a lifting capacity in excess of two hundred tons for lifting extremely heavy items such as bridges, buildings, aircraft hangers, and the like while maintaining the lifted item in its original orientation and parts therefor; namely, high pressure hydraulic pumps and double-acting rams, controlling valves, pressure sensor units and micro processor control units with associated remote control units
Machinery