Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1991-02-25
1992-09-01
Nicholson, Eric K.
Pipe joints or couplings
With casing, lining or protector
Lined
285331, 285398, 285915, F16L 1310
Patent
active
051434075
ABSTRACT:
An improved pipe coupling device comprising a cylindrical outer layer of plastic, such as polyvinyl chloride formed with a central inwardly-extending boss which coaxially supports a copper pipe extending therethrough and having recesses encircling said copper pipe adajcent each end of said outer layer to permit pipe to be coupled to be inserted into said recesses in a manner to encircle said copper pipe and to facilitate joining of the pipe to be coupled to said outer layer.
REFERENCES:
patent: 89373 (1869-04-01), Abbott
patent: 2470359 (1949-05-01), McLean
patent: 3188117 (1965-06-01), Press et al.
patent: 3433505 (1969-03-01), Weatherhead, III
patent: 3777354 (1973-12-01), Masters
patent: 3796057 (1974-03-01), Dougherty
patent: 4269437 (1981-05-01), Shaw et al.
patent: 4274665 (1981-06-01), Marsh, Jr.
Nicholson Eric K.
Sperry Robert M.
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