| 20100019561 | HOIST EMPLOYING A MULTIPLE PISTON CYLINDER - A hoist is provided, which includes a hoist frame, a torque arm coupled to the hoist frame, and a lift arm coupled to the torque arm. The hoist also has a cylinder operatively coupled with the torque arm. The cylinder includes a cylinder shaft with multiple pistons disposed on the cylinder shaft. The multiple pistons define multiple piston chambers within the cylinder where, during operation of the hoist, the multiple pistons simultaneously operate to effect operation of the hoist. | 01-28-2010 |
