A device for gripping a pipe or bar

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

Patent

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Details

F16L 37/092 (2006.01) F16L 37/22 (2006.01) F16L 37/23 (2006.01)

Patent

CA 2423679

A device for gripping the external wall surface of a pipe or bar without deforming or demaging the surface thereof, comprising a tubular body (1, 2) having at least one end open for insertion of a pipe or bar in a direction (17), a ball cage (8, 9) co-operating with a tapered internal wall part (11) and spring-loaded by a spring (10) and spring retaining member (3). A circumferentially split ferrule (4) has an outwardly tapered surface co- operating with the spring-retaining member (3). A metal ring (5), an anti- extrusion ring (6) and an 'O' ring seal (7) are slidably located within the body. The ball cage (8, 9) loosely retains a pipe or bar within the device, but when fluid pressure within the body (1, 2) increases the 'O' ring (7) is forced against rings (5, 6) thus in turn causing the split ferrule (4) to be compressed to grip the pipe or bar around its circumference thus to prevent it from being removed from the body (1, 2).

L'invention concerne un dispositif de retenue de la surface de la paroi externe d'un tuyau ou d'une barre qui ne déforme pas et ne détériore pas cette surface. Ce dispositif de retenue comprend un corps tubulaire (1, 2) pourvu d'au moins une extrémité ouverte servant à introduire un tuyau ou une barre dans une certaine direction (17), et une cage à billes (8, 9) coopérant avec la partie conique (11) de la paroi interne et comportant un ressort (10) et un élément de retenue (3) de ressort. Une virole (4) fendue sur son pourtour présente une surface extérieurement conique qui coopère avec l'élément de retenue (3) du ressort. Une bague métallique (5), une bague anti-extrusion (6) et un joint torique (7) sont montés coulissants dans le corps. La cage à billes (8, 9) retient sans serrer un tuyau ou une barre dans le dispositif. Cependant, lorsque la pression du fluide dans le corps (1, 2) augmente, le joint torique (7) est amené à force contre les bagues (5, 6), entraînant ainsi la compression de la virole (4) fendue qui retient alors le pourtour du tuyau ou de la barre et l'empêche de se désengager du corps (1, 2).

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