Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1998-03-10
1999-11-16
Larkin, Daniel S.
Measuring and testing
With fluid pressure
Dimension, shape, or size
73 495, 73 498, 73 491, G01M 328
Patent
active
059837063
ABSTRACT:
The present invention provides a single compact fitting for air, CO.sub.2, or nitrogen pressure testing either gas piping or waste piping. Each fitting is used for gas pipes of a particular outside diameter and waste pipes of a single larger diameter. The typical plumber would have a set, for example four, of the inventive fittings available, one for each size waste pipe that is be tested. The inventive fitting couples easily to either gas fuel piping or waste piping. A single air-pressure gauge is used to test either type of piping system. The inventive fitting is not limited to waste, vent, or gas piping systems; it can also be used to couple to other piping systems. The inventive fitting, in addition to being more versatile than conventional air-pressure test fittings, is also smaller and more compact.
REFERENCES:
patent: 3459229 (1969-08-01), Croft
patent: 4027525 (1977-06-01), Mull
patent: 4103537 (1978-08-01), Victor
patent: 5548993 (1996-08-01), Alexander
Marks Daniel L.
Ruiz James L.
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