Bellows valve and an injection valve
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United States of America Patent
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May 21, 2019
Grant Date -
Dec 14, 2017
app pub date -
Dec 10, 2015
filing date -
Dec 11, 2014
priority date (Note) -
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Abstract
A bellows valve includes a first bellows connected to a first cap member at one end and to a support member at the other end, and a second bellows connected to a second cap member at one end and to said support member at the other end. Respective first and second bellows cavities are thus formed inside each bellows. An orifice is arranged to fluidly interconnect the first and second bellows cavities, and a bellows-internal valve device is arranged to selectively open and close the orifice. The bellows-internal valve device includes first and second resilient members arranged on respective first and second sides of the support member and having respective portions being coupled to respective first and second holding members on the valve device. The bellows valve is useful in injection valves, such as gas lift valves.
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