Flexible corrugated tube

Details Flexible corrugated tube Flexible corrugated tube

1977-03-07

1979-02-27

Aegerter, Richard E.

Pipes and tubular conduits

Flexible

Corrugated

138135, 138136, 138154, F16L 1116

Patent

active

041413857

ABSTRACT:
A flexible corrugated tube comprising a succession of convolutions of spirally coiled thin metal strip having the overlapping corrugations of adjacent convolutions locked together by a plurality of spaced apart detents about the circumference of at least one of the sets of overlapping corrugations. Apparatus for forming the tube comprises a grooved roller in which at least one of the grooves comprises ridges extending a limited distance from the groove base toward the roller surface.

REFERENCES:
patent: 3578777 (1971-05-01), DeGain
patent: 3682203 (1972-08-01), Foti et al.
patent: 3815639 (1974-06-01), Westerbarkey
patent: 3865146 (1975-02-01), Meserole
patent: 3913623 (1975-10-01), Siegwart
patent: 4029129 (1977-06-01), Harper

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