Fluid handling – Systems – Line condition change responsive release of valve
Reexamination Certificate
2006-10-06
2008-05-13
Lee, Kevin (Department: 3753)
Fluid handling
Systems
Line condition change responsive release of valve
C137S070000, C137S458000
Reexamination Certificate
active
07370671
ABSTRACT:
A valve activation assembly which mechanically collapses a collapsible member, such as a buckling pin, in response to both overpressure and underpressure conditions of a pressurized fluid. A retention member retains the valve member in a selected position with respect to the fluid, such as an open or closed position. A piston assembly is configured to mechanically collapse the collapsible member both when a fluidic pressure upon the piston assembly exceeds a first level, and when a fluidic pressure upon the piston assembly falls below a second level. Upon collapse of the collapsible member, the valve member releases the valve member, allowing the valve member to move to a different selected position (such as closed or open, respectively). A third piston member and a biasing member thereon can also be utilized. In some embodiments, a fluid is preferably held in compression between selected piston members.
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Lee Kevin
Taylor Innovations L.L.C.
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