Pipe joints or couplings – With casing – lining or protector
Reexamination Certificate
2011-04-26
2011-04-26
Hewitt, James M (Department: 3679)
Pipe joints or couplings
With casing, lining or protector
C285S013000, C285S123300, C285S148130, C285S924000
Reexamination Certificate
active
07931306
ABSTRACT:
A vented gas riser for use in a system for conducting pressurized gas through a gas carrier pipe from a gas supply source line located below ground level to a delivery point disposed above ground is provided. A fluid tight gas riser protective casing is disposed around said carrier pipe and creates a gas escape passageway in an elongate annular space between the carrier pipe and the casing. Any gas which leaks from the gas carrier pipe is captured in the gas escape passageway. A riser transition head, which includes at least one vent passageway, provides a fluid connection with said gas escape passageway and with the atmosphere such that any gas which leaks in the vicinity of the gas escape passageway can escape through the at least one vent into the atmosphere.
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Royston James M.
Samudovsky John A.
Energy Control Systems, Inc.
Fournet Gwendolyn D
Hewitt James M
Shaffer Thomas R.
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