Clamping collar to conduit, which is provided and method of locking in rotation of the collar on the duct

摘要

The present invention relates to a clamping collar adapted to be mounted in a groove of a polymeric duct to be connected to a nozzle for the transport of a fluid, such a pipe equipped with the collar and a method of locking in rotation of the collar on the duct. The present invention applies in particular to a hot air duct under pressure for a motor vehicle type of plastic material and requiring a metal collar on-board. This clamping collar (1) comprises: - a circumferential clamping band (2) whose two ends (2a and 2b) are covered in a zone of overlap of the strip having two faces of the radially inner and outer covering, - a clamping member (3) of the strip is mounted at the contact of the faces of the covering, and - a locking means (6) mounted on the clamping member and adapted to lock the collar in rotation in the groove (11) of the pipe (10). According to the invention, this locking means, not metallic, bears on said face of the outer covering and covers the clamping member on the radially outer face of this.