Fluid control system with automatically actuated motor port lock

Details Fluid control system with automatically actuated motor port lock Fluid control system with automatically actuated motor port lock

1977-12-02

1979-03-27

Geoghegan, Edgar W.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

With means to control the working fluid to one working...

91530, 91433, 60484, F15B 1116

Patent

active

041459580

ABSTRACT:
A fluid control system includes a directional control valve assembly adapted for use in either an open center or a closed center configuration. The assembly is capable of incorporating one or more control sections, each with a manual control valve having its own variable pressure compensated flow controlling mechanism. Motor port lock-out valves are associated with each manual control valve, and a pressure responsive logic circuit automatically actuates the lock-out valves to hold them open when their associated manual control valve is in the power or float positions. When any manual control valve is in the float position, any other manual control valve may be operated in the power positions.

REFERENCES:
patent: 2214817 (1940-09-01), Harrington
patent: 2215115 (1940-09-01), Buffington
patent: 2750743 (1956-06-01), Korkowski et al.
patent: 3592216 (1971-07-01), McMillen
patent: 3631890 (1972-01-01), McMillen
patent: 3693506 (1972-09-01), McMillen et al.

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