Pipes and tubular conduits – Flexible – Corrugated
Patent
1981-02-09
1983-03-22
Shepperd, John W.
Pipes and tubular conduits
Flexible
Corrugated
138135, 138154, F16L 1116
Patent
active
043771882
ABSTRACT:
The flexible corrugated tube is made of spirally coiled thin metal strip with corrugations extending parallel to the longitudinal direction thereof, in which tube at least one corrugation of the one side edge of the one convolution (2) lies respectively in at least one corrugation on the other overlapping side edge of the subsequent convolution (3) and the crests of corrugations lying in each other are pressed down by only a part of the corrugation height in such a manner that the corrugation crests are wider than the corrugation cross-section beneath same. In order to provide such a corrugated tube, which is as inexpensive as possible from the point of view of the material required for the production thereof and is also highly flexible and resilient in axial direction, the corrugations with depressed crests have outside the detents (10) sides, or side walls (8), respectively, extending at right angles to, or approximately at right angles to the axis (7) of the tube, whereas corrugations located between same, having no detents, have sides of V-shaped or saw-tooth-shaped cross-section, with sides extending obliquely in relation to the axis of the tube.
REFERENCES:
patent: 4141385 (1979-02-01), Siegwart
Hulbert W. R.
Shepperd John W.
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