Clamping system for connecting together and for pre-fitting a first tube and a second tube

摘要

The system includes a collar (10) and a washer (28), the collar having a tightenable band (12) suitable for co-operating with bearing surfaces (16, 18) of the interconnected tubes (1, 2) via its inside periphery defining a setback (14). The washer (28) is secured to the collar and the system further includes first pre-fitter (38) for acting when the collar is in the non-tightened state to secure the collar to the first tube when the bearing surface (16) of the first tube is engaged in the setback (14). The clamping system further includes second pre-fitter (40) for acting, when the collar (10) is secured to the first tube (1) by the first pre-fitter (38), to secure the collar to the second tube (2) when the bearing surface (18) of the second tube (2) is also engaged in the setback (14).

主权项

1. A clamping system for connecting together a first tube and a second tube, facing ends of the tubes having bearing surfaces that project relative to cylindrical outside surfaces of the tubes, the system comprising:
a collar; a washer secured to the collar, the collar having a band suitable for co-operating with the bearing surfaces via an inside periphery of the band that defines a setback into which the bearing surfaces can be inserted, the collar having a non-tightened state and a tightened state, the washer being distinct from the band; a first pre-fitting means for acting when the collar is in the non-tightened state to secure the collar to the first tube when the bearing surface of the first tube is engaged in the setback, such that the bearing surface of the first tube is kept apart from the inside periphery of the band; and a second pre-fitting means for acting, when the collar is secured to the first tube by the first pre-fitting means, to secure the collar to the second tube so as to resist a displacement of the second tube in the direction going away from the first tube when the bearing surface of the second tube is also engaged in the setback, such that the bearing surface of the second tube is kept apart from the inside periphery of the band, wherein the first pre-fitting means comprises first deformable pre-fitting tabs suitable for co-operating with the first tube.