Valve for pressurized environments
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United States of America Patent
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Jul 14, 2020
Grant Date -
Aug 9, 2018
app pub date -
Mar 31, 2016
filing date -
Apr 30, 2015
priority date (Note) -
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Abstract
The invention relates to a valve comprising a tubular body in which a valve stem moves axially, the head of the stem cooperating with a corresponding seat on the valve body, said stem acting against a coiled spring that is housed in a chamber of circular cross-section and disposed between a bearing zone at a first end of the chamber and the stem in order to return the stem to the seat, said spring comprising: a first end with a large turn of a diameter substantially identical to a diameter of the chamber at the first end; and a second end with a small turn connected to the shank or the head of the stem and a second large turn for centering and radial stabilization in the chamber.
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