Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1976-08-02
1978-02-21
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60445, F15B 1120
Patent
active
040745287
ABSTRACT:
A hydraulic control system for controlling the flow between a reservoir, a pump having pressure flow compensating means associated therewith and first and second flow control means for controlling flow to first and second fluid operated devices is disclosed herein. The hydraulic control system includes a priority flow control valve which maintains a priority of flow from the pump to the first flow control means based upon the amount of flow required as well as the pressure requirements. The priority flow control valve has a valve spool which is positioned as a function of a biasing spring, as well as the pressure of the fluid from the pump to the first flow control means and the pressure of the fluid in the first fluid operated device. The system is particularly adapted for functions requiring higher pressure than low stand-by system pressure and where one of those functions require priority over the other.
REFERENCES:
patent: 2799995 (1957-07-01), Herman
patent: 2892311 (1959-06-01), Van Gerpen
patent: 3486334 (1969-12-01), Miller
patent: 3750405 (1973-08-01), Lech et al.
patent: 3908375 (1975-09-01), Young
patent: 3979908 (1976-09-01), Alderson
Khatti Ramkishan
Lourigan Patrick M.
Geoghegan Edgar W.
J. I. Case Company
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