Valves and valve actuation – Rotary valves – Plug
Reexamination Certificate
2010-03-18
2010-12-07
Bastianelli, John (Department: 3753)
Valves and valve actuation
Rotary valves
Plug
C251S900000
Reexamination Certificate
active
07845619
ABSTRACT:
A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back cap retainer nut and the back cap seal body permits the back cap seal body to flex and expand with a plug valve body of the plug valve. This ensures that the back cap seals are not stressed and a longer service life results.
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Bastianelli John
Nelson Mullins Riley & Scarborough LLP
Stinger Wellhead Protection, Inc.
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