Pneumatic test plug

Details Pneumatic test plug Pneumatic test plug

1984-11-05

1986-09-02

Levy, Stewart J.

Measuring and testing

With fluid pressure

Clamp, plug, or sealing feature

138 93, G01M 302

Patent

active

046088580

ABSTRACT:
The test plug is used for testing water or sewer lines for leaks. It comprises a hollow inflatable bulb attached to a handle. The bulb has an opening in fluid communication with an aperture extending through the handle. The bulb is inserted into the opening of the line and air under pressure is injected into the bulb to cause it to inflate to form a seal in the line for test purposes. After the test, the bulb is deflated and removed from the opening. The bulb has a plurality of ridges on its inside to cause the bulb to return to its original shape upon deflation. The ridges are in two sets. One set of ridges are in spaced apart lines, each of which extends from near the opening of the bulb to the opposite end thereof. The other set of ridges are in spaced apart lines each of which extends continuously around the inside of the bulb near the end opposite its opening.

REFERENCES:
patent: 2753876 (1956-07-01), Kurt
patent: 3120859 (1964-02-01), Wakley
patent: 4460019 (1984-07-01), Condon

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