Multi-port self-regulating proportional pressure control valve

Details Multi-port self-regulating proportional pressure control valve Multi-port self-regulating proportional pressure control valve

1988-12-27

1989-11-28

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91 48, 91433, 13762562, F15B 13043

Patent

active

048830917

ABSTRACT:
A multi-port, self-regulating, proportional control valve preferably uses a load output feedback system to produce working fluid load output pressures that are proportional to pilot control fluid pressures. In some embodiments, the control valve is programmable and capable of different load output pressures selected either prior to, or during, operation. The control valve apparatus according to the present invention is capable of a center-off or neutral condition that requires substantially no pilot control flow when there in no control valve output flow.

REFERENCES:
patent: 2931389 (1960-04-01), Moog et al.
patent: 2964059 (1960-12-01), Geyer
patent: 3015317 (1962-01-01), Buchanan et al.
patent: 3434390 (1969-03-01), Weiss
patent: 3804120 (1974-04-01), Garnett
patent: 3964518 (1976-06-01), Hesse et al.
patent: 4023593 (1977-05-01), Piccardo
patent: 4041983 (1977-08-01), Bianchetta
patent: 4066102 (1978-01-01), Tandrup
patent: 4126293 (1978-11-01), Zeuner et al.
patent: 4211256 (1980-07-01), Sturtz

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