Relief valve means for rotatable fluid-pressure mechanisms

Details Relief valve means for rotatable fluid-pressure mechanisms Relief valve means for rotatable fluid-pressure mechanisms

F - Mech Eng,Light,Heat,Weapons

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F16H 45/00 (2006.01) F16D 25/0638 (2006.01) F16D 43/284 (2006.01) F16D 48/02 (2006.01)

Patent

CA 1168955

RELIEF VALVE MEANS FOR ROTATABLE FLUID-PRESSURE MECHANISMS Abstract of the Disclosure Disclosed is a fluid-pressure operated mechanism such as a clutch having radial walls defining a fluid-receiving and exhausting chamber between them. The clutch is of the hydraulic- apply, spring-release type, fluid pressure being supplied to engage the clutch and fluid pressure being exhausted to release the clutch. Fluid pressure release is often not rapid enough to enable quick release of the clutch and relief valve means of the centrifugal type is provided to accelereate fluid release. The improvement resides in spring means in combination with the centrifugal valve to prevent operation of that valve during rotation of the clutch at speeds below a predetermined value, whereby to prevent complete dumping of fluid, so as to enable the released clutch to retain a volume of fluid consistent with rapid re-engagement of the clutch when fluid pressure is applied.

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