Multi-purpose valve

Details Multi-purpose valve Multi-purpose valve

A - Human Necessities

61

F

A61F 2/24 (2006.01) A61F 2/01 (2006.01)

Patent

CA 2362301

The invention relates to a multi-purpose valve characterized in that it comprises a band of a thermodynamic metal alloy with shape memory, with a memorised shape and a transition temperature which lies in the range for the normal body temperature of a mammal. The strip has a linear shape below the transition temperature and assumes the memorised shape above the transition temperature. The memorised shape is preferably a conical spiral with a closed tip, with the result that above the transition temperature range the valve will become a conical spiral.

L'invention concerne une soupape multifonctions caractérisée en ce qu'elle comprend une bande d'un alliage de métal thermodynamique à mémoire de forme, avec une forme mémorisée et une température de transition qui est comprise dans la gamme des températures normales d'un mammifère. La bande a une forme linéaire en dessous de la température de transition et, passé cette température de transition, prend la forme mémorisée. La forme mémorisée est de préférence celle d'une spirale conique à extrémité fermée; au-dessus de la gamme de températures de transition, la soupape prend la forme d'une spirale conique.

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