Pipes and tubular conduits – With closures and plugs
Reexamination Certificate
2005-11-22
2005-11-22
Hook, James (Department: 3754)
Pipes and tubular conduits
With closures and plugs
C138S090000, C138S093000
Reexamination Certificate
active
06966343
ABSTRACT:
A pipe plug apparatus configured for insertion into a section of pipe and adapted to radially expand so as to engage the inner surface of the pipe and form a positive seal therewith. The pipe plug is preferably configurable from a non-sealing configuration wherein radailly expandable seals are relaxed by application of pressure from a compressed fluid, to a spring biased sealing configuration automatically upon release of the pressure. A positive seal is automatically formed and maintained by spring biased axial compression.
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Bowen, Esq. Mark D.
Hook James
Stearns Weaver Miller Weissler & Alhadeff & Sitterson, P.A.
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