Fluid flow velocity emergency shutoff valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 7, 1994
Grant Date -
N/A
app pub date -
Jul 30, 1992
filing date -
Jul 30, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An emergency shutoff valve for monitoring fluid flow rate and closing a fluid conductor in the event of fluid flow increase above a predetermined value. The valve body contains a valve seat and a normally open valve head for seating on the seat and includes opposing valve stems each slidably supported, at one end portion, by the body. The valve head is fluid pressure balanced by equal upstream and downstream stem cross sectional areas. A plate is secured to the body by posts in axial spaced relation with respect to the downstream outwardly projecting end portion of one valve stem for supporting a pressure collapsible rod-like pin axially interposed between the plate and the valve stem. A valve stem bushing permits positioning the valve head relative to the seat for the purpose of changing the critical rate of flow required to impinge on the valve head resulting in an axial force on the valve stem that collapses the pin.
First Claim
Other Claims data not available