发明授权
US09404323B2 Emergency cylinder lowering circuit with regenerative hydraulics and burst protection 有权
具有再生液压和爆破保护的应急气缸降低回路

Emergency cylinder lowering circuit with regenerative hydraulics and burst protection
摘要:
A safety system for bypassing counter balance valves of a catwalk hydraulic cylinder from a remote location in a safe and controlled manner. Oil from a base end of the hydraulic cylinder is routed around the counter balance valves and flows through a velocity fuse to a needle valve, a check valve, and a pump outlet.
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