Valves and valve actuation – With correlated flow path – Valve operated by joining flow path sections
Reexamination Certificate
2005-06-21
2005-06-21
Keasel, Eric (Department: 3754)
Valves and valve actuation
With correlated flow path
Valve operated by joining flow path sections
C251S214000, C137S242000, C277S566000
Reexamination Certificate
active
06908070
ABSTRACT:
A valve insert for a cylinder valve for connecting an LPG tank to a gas consuming appliance has a body member mounted in the outlet end of the cylinder valve and a valve element slidable in the body member and cooperable therewith to control the flow of gas from the tank to the appliance. A quad sealing ring between the valve body and valve element seals against gas leakage therebetween and provides a lubricant reservoir for lubricating the surfaces thereof, and a wiper ring downstream of the quad sealing ring cleans the surfaces and precludes the ingress of foreign matter to the area of the gas sealing quad ring.
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patent: 5040905 (1991-08-01), Boyd
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patent: 5582201 (1996-12-01), Lee et al.
patent: RE35602 (1997-09-01), Lechner
patent: 6145753 (2000-11-01), Yano et al.
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Bartos Josef A.
Grewal Harsharan
Fay Sharpe Fagan Minnich & McKee LLP
Keasel Eric
Taiwan Pao
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