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US Patent 7293540 Valve operating assembly and method of manufacturing

Patent 7293540 was granted and assigned to MacLean-Fogg (company) on November, 2007 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee
‌
MacLean-Fogg (company)
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7293540
Date of Patent
November 13, 2007
Patent Application Number
11361273
Date Filed
February 23, 2006
Patent Primary Examiner
‌
Ching Chang
Patent abstract

The present invention relates to a leakdown plunger, comprising a first plunger opening, a second plunger opening, and an outer plunger surface that is provided with an axis and encloses an inner plunger surface, the first plunger opening is provided with a first annular plunger surface shaped to accommodate a valve insert, the second plunger opening is configured to cooperate with a socket body, the outer plunger surface includes a cylindrical plunger surface and cooperates with an engine workpiece, and the inner plunger surface includes an inner cylindrical plunger surface.

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