Pipes and tubular conduits – With closures and plugs – Inflatable
Patent
1993-05-20
1995-06-27
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflatable
138 89, 134167C, F16L 5512
Patent
active
054271533
ABSTRACT:
The improved drain plug device is formed in accordance with the present method. The device includes an elongated, hollow, flexible, resilient, unitary, self-supporting tubular member having a central passageway extending all the way therethrough to the exits in the opposite ends of the member. The member has a rear bulbous inlet portion, a middle very flexible portion to allow the member to bend around curves in drain lines, and a front bulbous outlet portion. The inlet and outlet portions have the same sidewall thickness while that of the middle portion is preferably somewhat thicker. Preferably, the middle portion is narrower in diameter than the other portions of the member. The outlet portion has a higher Shore hardness than the inlet portion and therefore expands radially under internal fluid pressure more slowly than the inlet portion but collapses, after removal of such pressure, at a faster rate, thus assuring that water in the tubular member during use thereof will not back up and out the inlet exit. The inlet is fitted with a pressure hose connector and the outlet with a pressure relief valve. The method includes molding the tubular member after supplying a mold with two different rubber-like moldable compositions so that, when set, the three portions of the member will exhibit their separate characteristic properties. The method also includes fitting the member with the connector and relief valve.
REFERENCES:
patent: 1180282 (1916-04-01), Bunn
patent: 1506418 (1924-08-01), Evensta
patent: 2171023 (1939-08-01), Buxton
patent: 2279257 (1942-04-01), Svirsky
patent: 3034522 (1962-05-01), Lithun
patent: 3190679 (1965-06-01), Lester
patent: 3195548 (1965-07-01), Lestakis
patent: 3241571 (1966-03-01), Garcia
patent: 3431945 (1969-03-01), Robillard
patent: 3802449 (1974-04-01), Mulinex
patent: 3840033 (1974-10-01), Warsinger
patent: 4460019 (1984-07-01), Condon
patent: 4475255 (1984-10-01), Tash
patent: 4660603 (1987-04-01), Tash
patent: 4790356 (1988-12-01), Tash
patent: 4865062 (1989-09-01), Tash
patent: 5234034 (1993-08-01), Lyon
Bryant III James E.
Posta Jr. John J.
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