Pipe plugging device

Details Pipe plugging device Pipe plugging device

1977-10-05

1979-12-11

Schwadron, Martin P.

Fluid handling

With repair, tapping, assembly, or disassembly means

Tapping a pipe, keg, or apertured tank under pressure

13724622, 137340, 166 55, 138 94, F16K 4300

Patent

active

041778278

ABSTRACT:
Apparatus for altering flow in an existing pipeline, including a shear and first actuator means for cutting transversely through the pipe wall and independent second actuator means for moving a surface associated with the shear into engagement with a sealing surface surrounding the pipe. The shear operates through a rotary valve element, mounted directly in a body of a housing surrounding the pipe. Channels encircling the shear sealing surfaces and rotary valve element distribute sealant between the respective mating surfaces to assure a fluidtight assembly. Fluid circulates through a chamber carried on the housing to isolate the first shear actuator means from the pipeline fluid. In a variant of the invention, a flapper plate valve replaces the rotary valve element where the pipe size is relatively large.

REFERENCES:
patent: Re29299 (1977-07-01), Estes et al.
patent: 1808715 (1931-06-01), Reynolds
patent: 2823696 (1958-02-01), Detlefsen
patent: 3532113 (1970-10-01), McKean
patent: 3590920 (1971-07-01), Orund
patent: 3687166 (1972-08-01), Herrin
patent: 3833020 (1974-09-01), Smith
patent: 3863667 (1975-02-01), Ward
patent: 3867964 (1975-02-01), Gardner
patent: 3958592 (1976-05-01), Wells et al.

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