Holding and releasing mechanism with a shape memory actuator

Details Holding and releasing mechanism with a shape memory actuator Holding and releasing mechanism with a shape memory actuator

B - Operations, Transporting

64

G

B64G 1/64 (2006.01) B64G 1/22 (2006.01) E05B 47/00 (2006.01) F16B 1/00 (2006.01) B64G 1/44 (2006.01)

Patent

CA 2344684

The aim of the invention is to provide a holding and releasing mechanism with a shape memory actuator which enables secure releasing and which has a simple constructive design and requires a minimum supply of energy. To this end, the wire end (7, 8) is held by a loose end of a shape memory wire (9, 10) which longitudinally contracts when the temperature is raised and withdraws its loose end from an aperture (27, 28) formed by the wire end (7, 8). The invention is used in a holding and releasing mechanism with a shape memory actuator which releases a wire end that is under tensile stress in a temperature-controlled manner.

L'invention concerne un mécanisme de retenue et de libération comportant un actionneur à mémoire de forme. L'invention vise à mettre au point un mécanisme de retenue et de libération muni d'un actionneur à mémoire de forme, qui permette d'obtenir une libération fiable, tout étant de structure simple et en ne nécessitant qu'un faible apport énergétique. A cet effet, il est prévu que l'extrémité de conducteur (7, 8) soit maintenue par une extrémité lâche d'un conducteur à mémoire de forme (9, 10), qui se contracte dans le sens de son axe longitudinal lorsque la température augmente et retire son extrémité lâche d'une ouverture (27, 28) formée par l'extrémité du conducteur (7, 8). L'invention s'utilise dans un mécanisme de retenue et de libération comportant un actionneur à mémoire de forme, qui libère, en température commandée, une extrémité de conducteur se trouvant sous contrainte de traction.

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