Gravity flow isolation device

Details Gravity flow isolation device Gravity flow isolation device

2005-11-08

2009-08-11

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

With closures and plugs

C138S090000, C138S094000, C251S299000

Reexamination Certificate

active

07571743

ABSTRACT:
A device for isolating at least a portion of a pipe from fluid flowing therethrough. The device having a body (1) that is at least partially insertable into the pipe. An external surface of the body is adapted to abut with an inner surface of the pipe to substantially prevent fluid flowing therethrough. At least one valve element (10) is arranged within the body (1) and is selectively openable and closable to permit fluid to flow through the body to facilitate removal of the body from the pipe.

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