Coupling for spiral drain pipe

Details Coupling for spiral drain pipe Coupling for spiral drain pipe

1975-09-25

1977-12-06

Taylor, Dennis L.

Pipe joints or couplings

Distinct spaced serial

61 10, 285390, 285391, 285DIG4, F16L 2500

Patent

active

040613682

ABSTRACT:
A coupling for joining spiral underground drainage pipes includes a cylinderical body with an inner circumferential flange and locking projections. When the coupling is rotated on to the drainage pipes the ends of the pipes are held flush on the flange and the inner surface of the flange forms a smooth continuation of the inner surfaces of the pipes.

REFERENCES:
patent: 1518014 (1924-12-01), Steen
patent: 1538669 (1925-05-01), Smith
patent: 2746486 (1956-05-01), Gratzmuller
patent: 3565464 (1971-02-01), Wolf
patent: 3682503 (1972-08-01), Bloom
patent: 3785682 (1974-01-01), Schaller et al.
patent: 3897090 (1975-07-01), Maroschak
patent: 3903928 (1975-09-01), Sykes et al.

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