Fluid handling – Systems – Supply and exhaust
Patent
1975-05-09
1978-02-14
Cohan, Alan
Fluid handling
Systems
Supply and exhaust
91446, 1375961, F15B 1302, F15B 1308
Patent
active
RE0295388
ABSTRACT:
A direction and flow control valve for use in a central fluid power load responsive system having plurality of loads. 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. System is powered by a single variable volume pump equipped with a load responsive control, which automatically maintains pump discharge pressure at a level higher than the pressure required by the system's largest load. Each direction and flow control valve is equipped with a differential pressure regulating control, which is responsive to the load pressure for controlling the negative loads and preferably a second differential pressure regulating control for controlling the positive loads.
REFERENCES:
patent: 2477669 (1949-08-01), Stephens
patent: 3398650 (1968-08-01), Garnjost
patent: 3410306 (1968-11-01), Malott
patent: 3455210 (1969-07-01), Allen
patent: 3470694 (1969-10-01), Budzich
patent: 3523742 (1970-08-01), Gold
patent: 3524386 (1970-08-01), Cudnohufsky
patent: 3532119 (1970-10-01), Lind
patent: 3534774 (1970-10-01), Tennis
patent: 3602243 (1971-08-01), Holt
patent: 3628567 (1971-12-01), Bender
patent: 3693506 (1972-09-01), McMillen et al.
Cohan Alan
Hogg William N.
Michalsky Gerald A.
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