Corrugated spiral pipe with joint, process of producing the same

Details Corrugated spiral pipe with joint, process of producing the same Corrugated spiral pipe with joint, process of producing the same

1993-09-17

1995-05-16

Reese, Randolph A.

Pipe joints or couplings

Molded joint

With packing filler

285369, 285903, 264 465, 264173, 277167, 277203, F16L 4706

Patent

active

054154405

ABSTRACT:
A corrugated spiral pipe with a joint is formed by the steps of winding a seal material on thread portions of a pipe end of a spiral pipe, fitting a part of a cylindrical joint body to the pipe end so as to cover a portion on which the seal material has been wound, injecting a liquid foamable resin material through an injection hole and letting it foam, and filling a trough portion of the spiral pipe with the foamed resin material so as to make the spiral pipe watertight for coupling purposes. When the spiral pipe with the joint is coupled to another spiral pipe, a waterstop is forced into a trough portion of a pipe end portion of the latter pipe, an elastic seal ring is fitted onto an outer peripheral face of the latter pipe, and the pipe end of the latter pipe is forced into an outward protruded portion of the joint body.

REFERENCES:
patent: 344760 (1886-06-01), Wilbur
patent: 3480493 (1969-11-01), Bauer et al.
patent: 4268041 (1981-05-01), Sovish et al.
patent: 4400022 (1983-08-01), Wright
patent: 5324047 (1994-06-01), Organ et al.

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