Hydraulic valve

Details Hydraulic valve Hydraulic valve

1982-02-09

1984-09-25

Scott, Samuel

Fluid handling

Systems

Supply and exhaust

13759618, 91448, F16K 1100

Patent

active

044730950

ABSTRACT:
A hydraulic safety valve for a press has two coaxially movable asymmetric pistons which, in the event of valve malfunction, block communication between the pump port and the working-fluid port while establishing communication between the working-fluid port and the reservoir port. In this position, the two pistons are hydraulically blocked against further movement and this blockage can be removed, and the valve returned to operative condition, only by removing fluid pressure at the pump port.

REFERENCES:
patent: 3139109 (1964-06-01), Ruchser
patent: 3874405 (1975-04-01), Thayer
patent: 4353392 (1982-10-01), Ruchser et al.

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