Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2008-03-03
2010-12-21
Bastianelli, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625420, C251S363000
Reexamination Certificate
active
07854239
ABSTRACT:
A trim assembly for a control valve includes a seal for sealing a leak path, where the seal is provided to perform advantageously in high-temperature applications, e.g., applications including temperatures of at least 450° F. (232.22° C.). The control valve comprises a valve body and control element. The control element is disposed within the valve body for controlling the flow of fluid therethrough. The trim assembly comprises a valve seat and a retention ring. The valve seat is fixed to the valve body, and the retention ring is threadably connected to the valve seat. The seal can be effected by an annular graphite seal compressed between the trim assembly and the valve body, or by a metal-to-metal contact between the retention ring and the valve body.
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International Search Report for PCT/US2009/031464, mailed May 6, 2009.
Christen John
Wears William E.
Wilke Galen D.
Bastianelli John
Fisher Controls International LLC
Marshall & Gerstein & Borun LLP
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