Valve assemblies with internal protective elements and methods of using same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 28, 2017
Grant Date -
Jun 9, 2016
app pub date -
Oct 5, 2015
filing date -
Dec 5, 2014
priority date (Note) -
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Abstract
Valve assemblies which comprise a valve housing; an inner valve element; an outer valve element spaced apart from the inner valve element; a valve stem on which both the inner valve element and the outer valve element are located; a portion of the valve stem between the inner valve element and the outer valve element is threaded; and a protective element located within the valve housing and covering the threaded portion of the valve stem.
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