Hydraulic control valve arrangement

Details Hydraulic control valve arrangement Hydraulic control valve arrangement

1975-04-18

1977-06-21

Cohen, Irwin C.

Fluid handling

Systems

Supply and exhaust

91451, 137469, 1375145, F15B 13042, F16K 1100

Patent

active

040305228

ABSTRACT:
Hydraulic control valve arrangement for controlling the amount of pressure fluid flowing to a consumer, in which the valve member of a first valve, which selectively controls flow of pressure fluid to at least one consumer or from the latter to a return passage, forms a variable throttle between the pressure fluid inlet passage and a consumer passage connected to the consumer, in which the throttle causes a pressure difference, and in which the pressure difference may be maintained substantially constant by a bypass passage between the inlet passage and the return passage in which a second valve member is arranged which is biased by a spring to a closed position and by the pressure difference produced by the variable throttle to an open position.

REFERENCES:
patent: 2339101 (1944-01-01), Parker
patent: 2539361 (1951-01-01), Cannon
patent: 3199532 (1965-08-01), Trick
patent: 3266251 (1966-08-01), Kacek
patent: 3610276 (1971-10-01), Seelman et al.
patent: 3677286 (1972-07-01), Wolfson
patent: 3847180 (1974-11-01), Kroth et al.
patent: 3882896 (1975-05-01), Budzich

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