Closure plug assembly for pressure testing liquid drain and vent

Measuring and testing – With fluid pressure – Clamp – plug – or sealing feature

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Details

138 90, 138 93, 138 94, G01M 304

Patent

active

044295685

ABSTRACT:
A closure plug assembly for the pressure testing of liquid drain and vent plumbing systems including a T or Y test section with a test opening comprises a cap sub-assembly, sealing means for releasably securing the cap sub-assembly across the test opening, and a plug such as an inflatable bulb or plate removably insertable in the plumbing system adjacent the test opening for test-damming the flow of liquid upstream therefrom. Link means is connected to the plug for removing the same at the conclusion of the test operation. A valved port in the cap is used for filling the plumbing system with test liquid under pressure during a testing operation.

REFERENCES:
patent: 2279257 (1942-04-01), Svirsky
patent: 2299116 (1942-10-01), Svirsky
patent: 2299434 (1942-10-01), Svirsky
patent: 3091259 (1963-05-01), Alessio
patent: 3154106 (1964-10-01), Nooy
patent: 3216456 (1965-09-01), LaVoie
patent: 3241571 (1966-03-01), Garcia
patent: 3431946 (1969-03-01), Sawyer
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patent: 3941156 (1976-03-01), Metzer
patent: 4168621 (1979-09-01), Kreitzenberg
patent: 4203473 (1980-05-01), Roberson
patent: 4306447 (1981-12-01), Franks, Jr.

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