초록 ▼

The clamping system comprises a collar (10) having a band (12) that has two flanks (13A, 13B), between which an inside trough (14) is defined that receives projecting clamping surfaces (1A, 2A) of two tubes (1, 2) to be assembled together. The system further comprises a plurality of individual retai

The clamping system comprises a collar (10) having a band (12) that has two flanks (13A, 13B), between which an inside trough (14) is defined that receives projecting clamping surfaces (1A, 2A) of two tubes (1, 2) to be assembled together. The system further comprises a plurality of individual retaining clips (20) distributed angularly around the first flank (13A), each clip having an inside branch (30) and an outside branch (32) facing each other, and between which the first flank is pinched, and a retaining portion (34) that, in the pre-attached state, is suitable for co-operating with the clamping surface (1A) of the first tube (1), one of the branches carrying a first bearing zone (36) that co-operates with a first bearing surface (13′A) of the collar that faces towards the axis (A) of said collar.

대표청구항 ▼

1. A clamping system for connecting two tubes together in sealed manner, the facing ends of the two tubes having clamping surfaces that project relative to the cylindrical outside surfaces of said tubes, the system comprising a collar having a band suitable for co-operating with said clamping surfac

1. A clamping system for connecting two tubes together in sealed manner, the facing ends of the two tubes having clamping surfaces that project relative to the cylindrical outside surfaces of said tubes, the system comprising a collar having a band suitable for co-operating with said clamping surfaces and for being tightened, the band having a first flank and a second flank between which an inside trough is defined that is suitable for receiving the clamping surfaces, the clamping system further comprising a plurality of individual retaining clips distributed angularly around the first flank, each clip having an inside branch and an outside branch facing each other, and between which the first flank is pinched, and a retaining portion situated radially further towards the inside, one of said branches carrying a first bearing zone that co-operates with a first bearing surface of the collar that faces towards the axis of said collar, for resiliently urging the clip back towards the axis of the collar in such a manner that the retaining portion is suitable for co-operating with the clamping surface of the first tube to retain the collar in a pre-attached state in which said collar is pre-attached to said tube while limiting movement of the collar relative to the first tube in the direction going towards the free end of said first tube, which end is provided with the clamping surface of said first tube. 2. A clamping system as claimed in claim 1, wherein the first bearing surface of the collar is formed on the inside edge of the first flank. 3. A clamping system as claimed in claim 1, wherein, for at least one of the clips, the first bearing zone is formed on a bearing tongue cut out from one of the inside and outside branches. 4. A clamping system as claimed in claim 3, wherein the bearing tongue is cut out from the outside branch and projects into the inside space of the clip between the inside and outside branches, at least via its free end. 5. A clamping system as claimed in claim 4, wherein the bearing tongue is connected to the outside branch in the vicinity of a junction where the inside and outside branches meet. 6. A clamping system as claimed in claim 4, wherein the bearing tongue is connected to the outside branch in a connection zone remote from the junction where the inside branch and the outside branch meet, and has a running portion that extends from said connection zone towards said junction and an end portion folded over into the inside space of the clip. 7. A clamping system as claimed in claim 3, wherein the bearing tongue is cut out from the inside branch and projects into the inside space of the clip between the inside and outside branches, at least via its free end. 8. A clamping system as claimed in claim 7, wherein the free end of the bearing tongue is curved over towards in the inside branch and is suitable for co-operating with the first bearing surface of the collar via a surface coming from the face of the inside branch that faces away from the outside branch. 9. A clamping system as claimed in claim 3, wherein the inside branch has a free end portion that is curved over inwards and that forms a second bearing zone that is suitable, via its outside surface, for co-operating with the end-wall of the inside trough of the band, on which end-wall the second bearing surface of the collar is formed. 10. A clamping system as claimed in claim 1, wherein the inside branch of at least one of the clips has a free end portion that is curved over inwards and that forms the first bearing zone that is suitable, via its outside surface, for co-operating with the end-wall of the inside trough of the band, on which end-wall the first bearing surface of the collar is formed. 11. A clamping system as claimed in claim 1, wherein the outside branch of at least one of the clips has a free end portion that is curved over inwards and that is suitable for covering a junction zone where the first and second flanks of the band meet. 12. A clamping system as claimed in claim 1, wherein, remotely from where it is connected to the outside branch, the inside branch of at least one of the clips has a pinching portion that comes back towards the outside branch. 13. A clamping system as claimed in claim 12, wherein the pinching portion is formed by a pinching tongue, cut out from the inside branch and also forming the first bearing zone that co-operates with the inside surface of the first flank on which the first bearing surface of the collar is formed. 14. A clamping system as claimed in claim 1, wherein the retaining portion of at least one of the clips is formed at the junction where the inside and outside branches meet. 15. A clamping system as claimed in claim 1, wherein the retaining portion of at least one of the clips is formed by a retaining tongue carried by the inside branch and folded over towards the axis of the collar. 16. A clamping system as claimed in claim 1, wherein, when the collar is in the pre-attached state in which it is pre-attached to the first tube, movement of the collar relative to the first tube is limited in a direction going away from the free end of said first tube, which free end is provided with the clamping surface of said first tube. 17. A clamping system as claimed in claim 16, comprising a movement-limiting member carried by the second flank. 18. A clamping system as claimed in claim 17, wherein the movement-limiting member is a washer. 19. A clamping system as claimed in claim 16, wherein the inside branch of at least one of the clips has a transverse flange projecting towards the axis of the collar. 20. A clamping system as claimed in claim 1, wherein the inside branch of at least one of the clips is provided with a holding spur projecting into the inside space of the clip between the inside and outside branches.