F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
103/7, 138/79.14
F15B 13/02 (2006.01) B62D 5/06 (2006.01)
Patent
CA 1223505
DEMAND RESPONSIVE FLOW CONTROL VALVE Abstract of the Disclosure A demand responsive flow control valve mechanism has a valve member which receives fluid flow from a power steering pump and delivers a predetermined amount of fluid to an operating system such as the power steering gear. The excess fluid delivered by the pump is directed by the valve member to a bypass port from which the excess fluid is returned to the pump or a reservoir. The fluid flow to the operating system is controlled by differential areas disposed on a spool valve and a flow regulating orifice sensitive to system flow for determining the pressure differential to be applied to the differential areas. The operating system has a variable orifice which serves as a demand regulator for establishing the pressure level requirements for the pump. The valve spool responds to the pressure differential and system pressure level to bypass flailed as required. A pair of check valves are disposed in the spool valve and are operable to provide two stages of pressure relief for the operating system.
467769
Anderson Stanley E.
Franklin Leonard N. Jr.
General Motors Corporation
Gowling Lafleur Henderson Llp
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