Wax micro actuator

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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Details

F04B 43/04 (2006.01) F04B 35/00 (2006.01)

Patent

CA 2667529

An actuator comprises a cavity (2) containing a working medium (3) that reversibly expands as it undergoes a phase change from a solid to a liquid state, a diaphragm (4) disposed adjacent the cavity such that expansion and contraction of the expandable working medium causes the diaphragm to deflect, and a semiconductor element (6) disposed in the cavity, wherein the semiconductor element is adapted to heat the working medium to cause it to undergo the phase change into the liquid state. The actuator may be used in a pump for an infusion system.

L'invention porte sur un actionneur comprenant: une cavité (2) contenant un milieu de travail (3) qui s'expanse de manière réversible au fur et à mesure qu'il subit un changement de phase le faisant passer de l'état solide à l'état liquide; une membrane (4) disposée adjacente à la cavité de manière que l'expansion et la contraction du milieu de travail expansible entraîne le fléchissement de la membrane; et un élément semiconducteur (6) disposé dans la cavité, l'élément semiconducteur étant apte à chauffer le milieu de travail afin de lui faire subir un changement de phase le faisant passer à l'état liquide. L'actionneur de l'invention peut être utilisé dans une pompe pour système de perfusion.

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