Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Separate valve means actuatable by a common nonmanual...
Patent
1986-05-29
1988-04-12
Garrett, Robert E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Separate valve means actuatable by a common nonmanual...
91526, 91527, 91436, F15B 1100, F15B 1300
Patent
active
047366737
ABSTRACT:
In a selective control device for plural kinds of oil-hydraulic actuators comprising an actuator selective valve for selecting an operative oil-hydraulic actuator from among plural kinds of oil-hydraulic actuators and a directional control valve for operating the selected actuator extendedly and retractedly, the actuator selective valve is provided with a quick extensional position which functions to connect an extensional pressure port thereof to a bottom side oil chamber of the selected actuator and also to connect a head side oil chamber to the bottom side oil chamber in order to extend the selected actuator quickly. The construction of the actuator selective valve eliminates a quick extensional valve adopted in a prior oil-hydraulic control device.
REFERENCES:
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patent: 3241461 (1966-03-01), Drone
patent: 3304633 (1967-02-01), Hein et al.
patent: 3357451 (1967-12-01), Tennis
patent: 3796232 (1974-03-01), Dalton
patent: 4487106 (1984-12-01), Field, Jr.
patent: 4610193 (1986-09-01), Barker et al.
Harada Takuo
Kurashima Toshiaki
Garrett Robert E.
Sanyokiki Kabushiki Kaisha
Williamson Mark A.
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