Revolved seat line for a curved flapper
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United States of America Patent
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Jul 2, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jul 13, 2016
filing date -
Jul 13, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A device, such as a valve, includes a hard seat having an axial bore extending along a central axis. A flapper pivotally connected with the hard seat at a hinge axis and pivotal between an open position to allow flow through the bore and a closed position to block flow through the bore, the flapper having a flapper sealing surface that slopes inward toward the central axis along a full circumference of the flapper sealing surface and the hard seat having a hard sealing surface that slopes inward toward the central axis conforming to the flapper sealing surface and on which the flapper sealing surface bears when in the closed position.
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