Corrugated pipe coupling

Details Corrugated pipe coupling Corrugated pipe coupling

1990-07-10

1992-01-14

Arola, Dave W.

Pipe joints or couplings

Essential catch

With manipulator

285318, 285351, 285358, 285903, F16L 3718

Patent

active

050804057

ABSTRACT:
A pipe coupling for a corrugated pipe, comprises a pipe coupling main body including a cylindircal portion having a small-diameter through hole, a pipe coupling main cylindrical portion having a large-diameter through hole, a connecting stepped portion formed between the small- and large-diameter through holes and having a circumferential groove, a stopper formed in the connecting stepped portion, for locking an end portion of a corrugated pipe, and a seal ring fitted in the circumferential groove, an inner cylinder including a through hole having a diameter substantially equal to an outer diameter of the corrugated pipe and an annular groove having a tapered surface and formed in an inner wall of a deep portion of the through hole, the inner cylinder being slidably and rotatably fitted in the large-diameter through hole of the pipe coupling main body, and a metal ring arranged in the circumferential groove of the inner cylinder and expandable in a circumferential direction thereof.

REFERENCES:
patent: 2129704 (1938-09-01), Meyer
patent: 3934902 (1976-01-01), NcNamee
patent: 4606564 (1986-08-01), Kurachi
patent: 4630850 (1986-12-01), Soka
patent: 4674775 (1987-06-01), Tajima et al.
patent: 4904002 (1990-02-01), Sasa et al.
patent: 4907830 (1990-03-01), Sasa et al.

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