Coupling with concave bearing surface

Details Coupling with concave bearing surface Coupling with concave bearing surface

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 17/04 (2006.01) F16L 17/035 (2006.01) F16L 21/06 (2006.01) F16L 23/036 (2006.01) F16L 25/04 (2006.01)

Patent

CA 2671222

A concave bearing surface for use with lugs of pipe coupling segments is disclosed. The concave bearing surface is positioned on the lug and surrounds an aperture which receives a fastener attaching the coupling segments together end to end surrounding pipe ends to be joined. Either the nut or the head of the fastener that engages the concave surface may be rotated to tighten the fastener. Engagement between the concave surface and the rotating member reduces the torque required to tighten the fastener and effect a stiff, fluid tight joint. A method of securing pipe ends using coupling segments with concave bearing surfaces is also disclosed.

L'invention concerne une surface de portée concave destinée à être utilisée avec des ergots de segments d'accouplement de canalisations. La surface de portée concave est positionnée sur l'ergot et entoure une ouverture qui reçoit un élément d'assemblage fixant ensemble les segments d'accouplement mis bout à bout entourant les extrémités de canalisations à raccorder. L'écrou ou la tête de l'élément d'assemblage qui coopère avec la surface concave peut être tourné pour serrer l'élément d'assemblage. L'interaction entre la surface concave et l'élément tournant réduit le couple nécessaire pour serrer l'élément d'assemblage et réalise un raccord rigide étanche aux fluides. L'invention concerne également un procédé de fixation d'extrémités de canalisations à l'aide de segments d'accouplement dotés de surfaces de portée concave.

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