Seal

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

Patent

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Details

F16J 15/06 (2006.01) E21B 33/10 (2006.01) F16J 15/08 (2006.01) F16L 21/04 (2006.01) E21B 33/00 (2006.01) F16L 55/132 (2006.01)

Patent

CA 2335990

A seal for sealing against a cylindrical surface, for example the facing surfaces of two concentric pipes, or the facing surfaces of a pipe and a plug or cap, is actuated by a series of elongate shape-memory material actuators (40) which are arranged around (outside or inside) the cylindrical surface. The actuators produce an axial movement of a wedge (30) into a gap to radially urge a seal ring (20, 22) into sealing contact with the cylindrical surface (10, 12).

La présente invention concerne un joint devant assurer une étanchéité avec une surface cylindrique, telle que les surfaces en contact de deux tubes concentriques, ou les surfaces de contact d'un tube et d'un bouchon ou d'une capsule. Ce joint est mis en oeuvre au moyen d'une suite d'actionneurs (40) de forme allongée en matériau à mémoire de forme. Ces actionneurs sont disposés sur le pourtour intérieur ou extérieur de la surface cylindrique. Ces actionneurs amènent axialement un élément biseauté (30) dans un intervalle de façon à exercer une force radiale sur une bague d'étanchéité (20, 22) qui vient créer un contact étanche avec la surface cylindrique (10, 12).

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