Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Activation of one path disables second path
Patent
1975-06-04
1976-12-14
Schwadron, Martin P.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Activation of one path disables second path
91 6, 91413, 137110, F15B 1304
Patent
active
039968383
ABSTRACT:
Apparatus for use in a vehicle having a hydraulically actuated steering mechanism and a hydraulically actuated implement. The apparatus comprises a housing, which includes a fluid inlet port, first and second working ports, for connection with the steering mechanism, a fluid return port and an auxiliary port for connection with the implement. A metering mechanism is located in the housing, and a first valve is movably located within said housing. The first valve has a neutral position communicating the inlet with said auxiliary port and blocking the inlet from said first and second working ports. The valve also has first and second actuated positions communicating said inlet port with said metering unit and communicating flow from the metering unit to said first or second working ports respectively. The valve further has surfaces blocking communication with the first and second working ports progressively restricting communication from the inlet to the auxiliary port and progressively increasing communication between the inlet and the first and second working ports as the valve is moved from said neutral position. The apparatus further includes a control valve for directing fluid to the implement when said first valve blocks flow of fluid to the auxiliary port.
REFERENCES:
patent: 2633153 (1953-03-01), Gunn
patent: 2745499 (1956-05-01), Berninger
patent: 3253613 (1966-05-01), Richolt
patent: 3260165 (1966-07-01), Larsen
patent: 3452543 (1969-07-01), Goff
patent: 3481147 (1969-12-01), Goff
patent: 3513751 (1970-05-01), Escobosa
patent: 3568868 (1971-03-01), Chichester
patent: 3712176 (1973-01-01), Meyers
patent: 3834278 (1974-09-01), Goff
Hershkovitz Abraham
Schwadron Martin P.
TRW Inc.
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