Hydraulic holding valve

Details Hydraulic holding valve Hydraulic holding valve

1986-04-07

1988-03-01

Nilson, Robert G.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

1374933, F15B 13042

Patent

active

047277920

ABSTRACT:
A hydraulically controllable, leakproof holding valve is disclosed, and which is adapted to be attached in the lifting hydraulic line leading to a working cylinder or the like. The holding valve includes a slidably mounted control piston, which functions as a controlled non-return valve during periods when the working cylinder is stationary or being lifted, and the piston also functions as a throttling valve during periods when the working cylinder is being lowered.

REFERENCES:
patent: 3906991 (1975-09-01), Haussler
patent: 4172582 (1979-10-01), Bobnar
patent: 4223693 (1980-09-01), Kosarzecki

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