A collet for pipe coupling

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 19/06 (2006.01) F16L 19/12 (2006.01)

Patent

CA 2482505

An annular collet or gripping member radially located within a coupling assembly of the type having a hollow body, nut and an O-ring or seal for connection of a pipe thereto. The collet is axially split, the split defined by first and second generally parallel ends that are of an engageable configuration, typically by one end having a projection and the other end a correspondingly shaped cavity enabling the ends to interlock. In normal operation of the coupling the collet exerts a longitudinal force on the O-ring causing a seal. When it experiences an axial force that would normally relatively displace the two ends causing a leak, being engaged to each other this movement is resisted ensuring that the seal is maintained. The present invention also relates to a coupling having such a collet.

Collet annulaire ou pièce de préhension située de façon radiale dans l'ensemble d'accouplement, comportant un corps creux, un écrou et un joint annulaire ou un joint d'étanchéité permettant de se raccorder à ce tuyau. Le collet est coupé dans la direction axiale, la fente étant définie par la première et la seconde extrémité généralement parallèles et dont la configuration permet un engagement, en général au moyen de l'extrémité qui se projette et l'autre extrémité comportant une cavité modelée correspondante permettant aux extrémités de s'enclencher. Au cours d'une opération normale d'accouplement, le collet exerce une force longitudinale sur le joint annulaire engendrant ainsi l'étanchéité. Ce mouvement, lorsqu'il exerce une force axiale qui normalement déplacerait les deux extrémités et causerait une fuite puisque ces dernières sont enclenchées l'une dans l'autre, assure une résistance et fait en sorte que le scellement se maintient. La présente invention touche également les accouplements ayant un tel collet.

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