Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
June 16, 2009
Patent Application Number
10906309
Date Filed
August 22, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
Apparatus and methods for constructing a valve assembly comprising an anti-friction ring. The anti-friction ring allows a closure member in the valve assembly to more freely rotate during operation of the valve assembly. Consequently, the closure member strikes a sealing member in different rotational positions during repetitive cycling of the valve assembly.
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