Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1997-07-16
2000-02-29
Hook, James F.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
138 90, F16L 5511
Patent
active
060297093
ABSTRACT:
The present invention is an enclosure for securing selective access to the hollow interior of cylindrical pipes. The preferred embodiment comprises a selectively engagable toggling mechanism contained within a cylindrical body which transmits removal forces into increased frictional removal resistance forces. Toggling cross-arms provide the frictional resistance to removal by gripping the inner wall of the pipe. The device may also include a pipe interior seal and vent.
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Hook James F.
Jolly Michael B.
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