Valves and valve actuation – With correlated flow path – Pipe coupling or union
Patent
1978-07-10
1980-03-25
Cline, William R.
Valves and valve actuation
With correlated flow path
Pipe coupling or union
251150, 251326, 251151, 138 943, F16K 3312
Patent
active
041947215
ABSTRACT:
A plumbing test fitting for waste or vent pipes and stacks extending between adjacent floors of a building having a closure plate adapted to be slidably fitted between a pair of spaced adjacent ends of a pair of pipes, the joint being sealed by a detachable sealing clamp which also sealably bears against the periphery of the closure plate. A sliding valve element having an operating stem which extends outwards between the pipes and through the sealing clamp can be operated to open or close a passage in the closure plate so as to enable the pipe to be closed for testing and thereafter opened to permit testing fluid to escape down the pipes.
REFERENCES:
patent: 2860901 (1958-11-01), Whalen
patent: 2893684 (1959-07-01), Williams et al.
patent: 3860038 (1975-01-01), Foani
patent: 4112969 (1978-09-01), Still
Cline William R.
Nako Enterprises Ltd.
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