Stopping fluid flow in pipes

Details Stopping fluid flow in pipes Stopping fluid flow in pipes

1977-03-21

1978-10-10

Schwadron, Martin P.

Fluid handling

With repair, tapping, assembly, or disassembly means

Tapping a pipe, keg, or apertured tank under pressure

83 54, 137322, 138 94, 138 943, F16K 4300

Patent

active

041191153

ABSTRACT:
An apparatus for cutting into and stopping the flow of fluid in a plastic pipe including a cutting blade that is forced downwardly into a pipe by a hydraulic force. The blade is slightly larger than the internal diameter of the pipe and thus when located within the pipe stops the flow of fluid in the pipe. The apparatus is constructed so that the cutting, flow stopping and the consequential withdrawal of the blade operation is carried out without loss of fluid from the pipe. Part of the apparatus is left on the pipe and encapsulated to complete the operation.

REFERENCES:
patent: 463524 (1891-11-01), Madden
patent: 578418 (1897-03-01), Payne
patent: 3319661 (1967-05-01), Shindler
patent: 3532113 (1970-10-01), McKean
patent: 3716068 (1973-02-01), Addison
patent: 3833020 (1974-09-01), Smith
patent: 3863667 (1975-02-01), Ward
patent: 3865129 (1975-02-01), Peterson
patent: 3905718 (1975-09-01), Luckenbill et al.

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