Reinforcing device for hydraulic jack - has electrical valve in hydraulic line set to close on loss of flow

摘要

The reinforcing device for an hydraulic lift with at least one lifting cylinder. The hydraulic line (12) to the lifting cylinder (6) which is under increased pressure on loading, is connected to the cylinder via an electrical valve (9). When there is loss of flow, the valve springs into the closed position. The valve has a built-in shutter (13), whose opening cross section (13a) is chosen according to the desired maximum falling speed of the lead. The valve is piped directly to the lifting cylinder (6).