| 摘要 |
<p>RELIEF VALVE MEANS FOR ROTATABLE FLUID-PRESSURE MECHANISMS 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 hydraulicapply, 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.</p> |
