F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/54
F16K 3/00 (2006.01) F16K 5/20 (2006.01)
Patent
CA 1070288
Abstract of the Disclosure A ball valve comprises a ball shaped closure mounted on spindles extending at right angles to a flow passage in the valve body. Between the closure and the regulating spindle a parallelepiped-shaped joint portion is formed on the end of the regulating spindle to engage bearing blocks in the adjacent part of the closure on both sides of the joint portion of the regu- lating spindle. The blocks are mounted to turn about axes parallel to the regulating spindle and have opposed planar surfaces. The clearance between the joint portion of the regulating spindle and bearing blocks is greatest when the joint portion is parallel with the bore of the closure, and becomes smaller and finally disappears when the direction of the joint portion of the regulating spindle is made to deviate in relation to the closure bore in either direction of turning. The joint between the regulating spindle and the closure thus permits tipping as of the closure under the action of the pressure medium about the spindle situated on the opposite side of the closure. However when the regulating spindle is turned, in the first phase it turns in relation to the closure and restores the closure from a tipped position to- wards a position where both spindles are at right angles to the longitudinal axis of the valve flow passage. On further turning of the regulating spindle in the same direction the torque required for turning the closure to desired position is low.
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