Patent · US Expired

Cable conduit with ridged inner wall

US5154869A · kind A · utility

3Cited by

6References

4Claims

0Family size

Assignee

Ernst Vogelsang GmbH & Co. KG · DE

Inventors

Horst Bergmann · Walldürn, DE
Horst Vogelsang · Herten, DE

Key dates

Filing date	May 13, 1991
Grant date	Oct 13, 1992
Priority date	—
Expiry date	May 13, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2995/0072
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An electrical conduit for wires or cables is formed by a tube extending along a longitudinal axis and having an inner wall formed with a plurality of longitudinally throughgoing ridges each formed by a plurality of longitudinally joined sections with every other section inclined oppositely relative to the axis to the intervening sections. In other words the ridges run alternately along a right-hand helix and then a left-hand helix. The sections may be of varying pitch and part circular in section. They can also be substantially identical in which case they are straight, meet at corners, and are all of the same pitch.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.