Pipe joints or couplings – With strain relief
Patent
1983-05-13
1986-12-09
Arola, Dave W.
Pipe joints or couplings
With strain relief
285184, 285336, 285365, F16L 1304
Patent
active
046276467
ABSTRACT:
The invention relates to a pipe fitting A, B, C with flange connection for joining at least two pipe ends angled with respect to each other, suitable for the installation of a pipe system of desired configuration with branchings and/or elbows. The pipe system to be installed has to have the capacity to be installed in the smallest possible space and with the most sharp and twisted bends in any desired direction. According to the invention this problem is solved by molding an annular rim flange (3, 4, 14, 15, 16) extending over the surface of the fitting to at least one of the connection openings (1, 2, 11, 12, 13) angled towards each other by at least 45.degree. of the arch-shaped fitting (A, C) and by the fact that the flange projection and the inner curvature of the pipe fitting (A, C) are mutually coordinated in such a way as to barely allow the positioning on the flange of a clamping collar (F) by means of which the rim flange is directly pressable against a counterflange. The rim flange must therefore be shaped on its outside and at its frontal surface so that on the one hand it can receive a sealing means and on the other hand it still has enough elasticity with respect to the outer wall of the pipe when the flanges are pressed together by the clamping collar (F) engaging over them. For this purpose a groove for receiving the sealing means and a circular recess at the base of the rim flange in the frontal area are provided, serving as theoretical bending point.
REFERENCES:
patent: 2212747 (1940-08-01), O'Leary
patent: 3765707 (1973-10-01), Westberg
patent: 3794361 (1974-02-01), Westberg
patent: 4063758 (1977-12-01), Westberg
patent: 4106798 (1978-08-01), Haug
patent: 4254973 (1981-03-01), Benjamin
"+GF+ Plastics Pipe Fittings", published in 1970 catalogue, by Georg Fischer AG.
Arola Dave W.
Dubno Herbert
Ross Karl F.
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