Hydraulic pump flow shut-off valve

Details Hydraulic pump flow shut-off valve Hydraulic pump flow shut-off valve

2007-08-17

2010-12-21

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

C060S452000

Reexamination Certificate

active

07854116

ABSTRACT:
A load sense valve assembly includes a first valve in flow communication with a pump discharge line, a second valve in flow communication with the first valve, and a third valve in flow communication with the first valve. The first valve can be a solenoid actuated directional control valve. The second and third valves can be hydraulic pilot actuated directional control valves.

REFERENCES:
patent: 4523430 (1985-06-01), Masuda
patent: 4821514 (1989-04-01), Schmidt et al.
patent: 5095697 (1992-03-01), Kauss
patent: 6874318 (2005-04-01), MacLeod
Parker Hannifin Corporation; Series PAVC Variable Displacement, Piston Pumps; Catalog 2600-101-2/US; (5 pages).

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