Floating valve stem seal

Details Floating valve stem seal Floating valve stem seal

F - Mech Eng,Light,Heat,Weapons

01

L

171/81

F01L 3/08 (2006.01) F16J 15/32 (2006.01) F16J 15/56 (2006.01)

Patent

CA 2020190

A valve stem seal assembly includes a rigid cylindrical shell and an annular resilient seal body supported within an endwall of the shell. The resilient seal body includes an exterior circumferential groove, and the endwall contains an aperture adapted for being received in the groove. The circumference of the aperture in the endwall is greater than the circumference of the bottom of the groove. A predetermined radial clearance is thereby created to provide that the resilient seal body remains concentric with a reciprocating valve stem, notwithstanding the fact that the stem may be eccentric relative to a valve guide to which the assembly is affixed.

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