Hydraulic control apparatus

Details Hydraulic control apparatus Hydraulic control apparatus

1985-11-21

1987-03-03

Michalsky, Gerald A.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91454, 91461, 13759616, F15B 13043

Patent

active

046466223

ABSTRACT:
A hydraulic control apparatus has at least two meter-in and two meter-out poppet valves. In order to be compact and deal with a great flow rate, the apparatus is arranged such that a pair of meter-in poppet valves and load check valves are located in an upper horizontal plane, a pair of meter-out poppet valves and solenoid-actuated pilot valves are located in a lower horizontal plane, and a pair of a pilot valve associated with the meter-out poppet valve and a reducing valve associated with the meter-in poppet valve are located in a middle horizontal plane and are respectively disposed in opposed relationship to each other, and the load check valve is vertically located in parallel relationship with the meter-out poppet valve.

REFERENCES:
patent: 4201052 (1980-05-01), Breeden et al.
patent: 4535809 (1985-08-01), Anderson

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