Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber
Patent
1978-06-16
1980-06-03
Hershkovitz, Abraham
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
91375A, 91384, 91532, 13762568, F01B 2502
Patent
active
RE0302910
ABSTRACT:
A vehicular power steering system including a primary hydraulic circuit for operating the steered wheels and a secondary hydraulic circuit for operating auxiliary equipment such as an implement or the like which may be attached to the vehicle. The system includes a fluid controller for controlling the flow of pressurized fluid from a power pump to the primary or steering circuit and the implement or secondary circuit. The fluid controller includes a valve mechanism which is constructed and arranged to provide the primary hydraulic circuit with pressurized fluid in the amount necessary to produce the desired steering maneuver while furnishing the secondary hydraulic circuit with the excess pressurized fluid supplied by the power pump. Thus the requirements of the primary hydraulic circuit may be always satisfied and have priority over the requirements of the secondary circuit in all modes of operation.
REFERENCES:
patent: 2247140 (1941-06-01), Twyman
patent: 2910971 (1959-11-01), MacDuff
patent: 3119235 (1964-01-01), Lewis
patent: 3376892 (1968-08-01), Stacey
patent: 3452543 (1969-07-01), Goff
patent: 3481147 (1969-12-01), Goff
patent: 3568868 (1971-03-01), Chichester
patent: 3713296 (1973-01-01), Black
patent: 3722723 (1973-03-01), Matthews
Gresen Model SPI-Spool Schematic, Gresen Mfg. Co., Minneapolis, Minn., 5/22/61.
Goff Raymon L.
Rau Jim L.
Hershkovitz Abraham
TRW Inc.
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