Measuring and testing – With fluid pressure – Clamp – plug – or sealing feature
Patent
1995-05-23
1996-12-03
Brock, Michael
Measuring and testing
With fluid pressure
Clamp, plug, or sealing feature
138 90, 138 93, G01M 328
Patent
active
055810187
ABSTRACT:
An inflatable pneumatic plug useful for expediting the hydrostatic testing of bathtub and water plumbing installations. The pneumatic plug has a semi-rigid handle tube with an air valve at one end and an inflatable tube attached to its opposite end. The inflatable tube and the handle are of sufficiently small diameter to pass through the overflow drain in the bathtub, past the drain stopper assembly and into the drain trap without disassembly of the plumbing. The inflatable tube, such as a latex tube, is chosen with a length and wall thickness such that the inflatable tube is relatively stiff and will tend to deflect laterally around a solid obstacle when advanced into the plumbing rather than flattening axially. The inflatable tube is inflatable to a diameter at least five times greater than its deflated diameter for making a water-tight seal in a plumbing conduit.
REFERENCES:
patent: 2309429 (1943-01-01), Ahern
patent: 2311196 (1943-02-01), Ahern
patent: 2678666 (1954-05-01), Theis et al.
patent: 2753876 (1956-07-01), Kurt
patent: 4762115 (1988-08-01), Penner
patent: 4848155 (1989-07-01), Huber
Allen Brian C.
Simpson James D.
Brock Michael
Epstein Natan
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