| 摘要 |
A reverse hydraulic jack for a gap is provided to simply raise a weight even in a narrow gap and to reduce the construction cost by simplifying the repairing method. A piston(2) installed in the interior of a cylinder(1) is reciprocally moved in a hydraulic jack. The cylinder protrudes downward and a steel plate(3) is integrally connected to the lower surface of the cylinder. A circular steel plate is connected to the tip end of the lower side of the piston and protrudes from a hole. The circular steel plate is reversely used. The cylinder and two pistons are connected to each other in parallel. |
