Hydraulic shape memory material stress to hydraulic pressure...

F - Mech Eng,Light,Heat,Weapons – 03 – G

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F03G 7/06 (2006.01) F15B 15/14 (2006.01) F16D 65/14 (2006.01) F16D 65/28 (2006.01)

Patent

CA 2067252

A hydraulic shape memory material force converter is provided comprising a shape memory material. The force converter utilizes hydraulic units and a hydraulic fluid. The hydraulic unit is changed from a first position to a second position when the shape memory material, connected at one end to one end of the hydraulic unit and its other to a fixed point or a second end of the hydraulic unit, changes from a martensitic to an austenitic state upon heating. The hydraulic fluid responds to the movement of the hydraulic unit by moving from the hydraulic unit to a receiving device, which receiving device performs work due to the motion of the hydraulic fluid. Upon cooling the shape memory material to change it from the austenitic state back to the martensitic state, the hydraulic unit returns to its original position, with a biasing means being provided to return the hydraulic unit to its rest position.

Convertisseur de force hydraulique en matériau à mémoire de forme. Le convertisseur de force utilise des éléments hydrauliques et un fluide hydraulique. L'élément hydraulique passe d'une première position à une seconde position lorsque le matériau à effet de mémoire, relié, à l'une de ses extrémités, à une extrémité de l'élément hydraulique et à sa seconde extrémité à un point fixe ou à la seconde extrémité de l'élément hydraulique, passe d'un état martensitique à un état austénitique lorsqu'on le chauffe. Le fluide hydraulique réagit au mouvement de l'élément hydraulique en se déplaçant de l'élément hydraulique à un dispositif récepteur, lequel accomplit une opération causée par le mouvement du fluide hydraulique. Lorsqu'on refroidit le matériau à mémoire de forme afin de le ramener de l'état austénitique à l'état martensitique, l'élément hydraulique reprend sa position originale, un élément de sollicitation étant prévu pour ramener l'élément hydraulique vers sa position de repos.

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