Title: Pipe plugging device and method

Abstract: A temporary plug for insertion into an open end of a conduit for gaseous fluids comprises an imperforate body having a fluid tight distensible member which is arranged to be enlarged by the introduction of fluid therein, and to seal against the inside surface of the conduit and plug the same. A flexible vent tube has one end connected with the plug body, and the other end positioned at a location remote from the open end of the conduit. The vent tube communicates the gaseous fluids with the atmosphere at the remote location to prevent leakage of the fluid in the vicinity of the plugged end of the conduit.

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Inventors: Dunn, Edward E. (Independence, MO, US)

Application Number: 834695
Filing Date: 1977-09-19
Publication_date: 1979-03-20
Assignee:
Primary Class(es): 138/93
Other Classes:
US Patent Ref:

2927609	Mar, 1960	Vander Lans	138/93.
3091259	May, 1963	Alessio	138/90.
3593749	Jul, 1971	Reardon	138/93.

Other Refs:
Primary Examiner: Bell, Houston S.
Assistant Examiner:
Attorney: Fishburn, Gold & Litman