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US 4,394,826 AGranted
Orifice meter with isolation valve on the carrier
AssigneeGrove Valve and Regulator Company
InventorDavis A. Van Scoy
Life of this patent
Estimating the term…
Abstract
An orifice meter with an isolation valve plate pivotally suspended from the bottom of the orifice disc carrier. The valve plate is eccentrically mounted so that it drops to horizontal position when the carrier is raised free of the flow passage sealing surfaces, to seal off an upper chamber into which the disc carrier is raised. When again lowered, the valve plate engages a cam member which cams its back into vertical position nested in a recess along the bottom of the disc carrier.
Claims4
An orifice meter comprising:
- a body having a lower main chamber with aligned flow passages therein and an upper service chamber;
- an orifice disc carrier plate movable in said body between said main chamber and said service chamber;
- a downwardly directed, sealing surface around the lower end of said service chamber;
- and
- an isolation valve plate pivotally suspended from the bottom of said carrier plate;
- an edge of said valve plate being engagable with said sealing surface when said carrier plate is raised to pivot said valve plate into horizontal position to then be moved into sealing engagement with said sealing surface upon further lifting of said carrier plate.
3 more elements
Dependencies are inferred from the claim text.