Flexu00ecvel tubular device, for example, a bellows, and the use of a device.

摘要

"Flexu00ecvel tubular device, for example, a bellows, and use of a device.The present invention is relating to a flexible tubular device, namely, a bellows with an internal diameter up to 60 mm, said device comprising one or more corrugated convolutions (2),Said convolutions having a global form as bell, with portions of the top rounded (T) and portions of the bottom rounded (B, B 39 ).The innovative aspects involve the curvature of the outer surface of the convolutions (2) is numerically less in the portions of the top (T) of the portions of the bottom (B, B 39 )This curvature is derived from a curve (6) defined as the intersection of the outer surface (4) of the device, and a plane through the longitudinal axis (8) of the device.As well as they involve the curvature of the curve changes sign only once in a position change (P, P 39 ) is located between a portion of the top (T) and a portion of the bottom adjacent (B,B 39, 39), and the length of a first section (7) on the curve (6) is at least 10% longer than the length of a second section (9) on the curve.The first section (7) extending from a position of an exchange (P) to a position adjacent exchange (P) through a portion of the saw (T),And the second section (9) extending from a portion of an exchange (P) to a position adjacent exchange (P 39 ) through a portion of the founded (B, B 39 ).This provides a project improved, with increased durability due to increased flexibility at lower voltages, compared with the previous method.