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US 4,377,188 AGranted
Flexible corrugated tube
OwnerEmil Siegwartinventor
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OwnerEmil Siegwartinventor
Estimating the term…
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.
A flexible corrugated tube (1) of a spirally coiled thin metal strip having corrugations extending parallel to the longitudinal direction thereof, in which tube at least one corrugation of the one side edge of a strip convolution (2) lies in at least one corrugation on the other overlapping side edge of the subsequent convolution (3), and small sections of the crests of corrugations lying one within the other are pressed down with respect to said crests by only a part of the corrugation height to become detents (10) in such a manner that the corrugation crests are wider than the corrugation cross-section located beneath same, characterized in that the corrugations having depressed crests have sides (flanks) or lateral walls (8), respectively, outside the detents (10) at right angles to, or approximately at right angles to the axis (7) of the tube and corrugations located therebetween having no detents have a V-shaped or saw-tooth-shaped cross-section with sides or lateral walls (9) extending obliquely to the axis of the tube.
Dependencies are inferred from the claim text.