US Patent 7458559 Bi-directional knife gate valve apparatus and method

Patent 7458559 was granted and assigned to SPX Corporation on December, 2008 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

SPX Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7458559

Date of Patent

December 2, 2008

Patent Application Number

11490251

Date Filed

July 21, 2006

Patent Citations Received

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US Patent 11781656 Knife gate valve

Patent Primary Examiner

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John K. Fristoe, Jr.

Patent abstract

An improved method and apparatus for a valve assembly features a valve body, a first seat ring mounted in the valve body, a second seat ring mounted in the valve body, and a retractable blade gate slideable in between the first seat ring and the second seat ring. The gate is moveable between open and closed position. A first elastomeric ring is disposed in between the valve body and the first seal ring and projecting towards the gate blade. A second elastomeric ring is disposed in between the second seat ring and the valve body and projecting towards the gate blade.