Load responsive fluid control valves

Details Load responsive fluid control valves Load responsive fluid control valves

1976-08-25

1977-11-15

Cohan, Alan

Fluid handling

Systems

Supply and exhaust

91421, 91436, 91446, 1375961, F15B 1308

Patent

active

040581403

ABSTRACT:
A load responsive direction and flow control valve for use in fluid power load responsive system. The valve maintains a selected constant flow level for control of both positive and negative loads, irrespective of the change in the load magnitude or change in the fluid pressure, supplied to the valve. When controlling positive or negative loads the valve maintains a constant pressure differential across a flow control metering orifice utilizing a single control slide member, first by throttling fluid entering the inlet chamber and then by throttling the fluid leaving the outlet chamber. The valve may be used with fixed displacement pumps, fixed displacement pumps equipped with differential pressure relief valves, with variable pumps equipped with pressure compensators and variable pumps equipped with differential pressure compensators.

REFERENCES:
patent: 3398650 (1968-08-01), Garnjost
patent: 3722543 (1973-03-01), Tennis
patent: 3744517 (1973-07-01), Budzich
patent: 3771558 (1973-11-01), Ailshie
patent: 3807447 (1974-04-01), Masuda
patent: 3951162 (1976-04-01), Wilke
patent: 3984979 (1976-10-01), Budzich

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