Stud fastener and stabilising device

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

Patent

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Details

F16B 21/18 (2006.01) E05B 15/02 (2006.01) E05B 47/00 (2006.01)

Patent

CA 2602639

The invention relates to a stabilising device (120) for an assembly which includes two shape memory alloy wires (104, 106) adapted to operate in conjunction. The stabilising device (120) includes a rocker plate (108) for attachment to each of the shape memory alloy wires; the rocker plate (108) is adapted to pivot when one shape memory alloy wire (104 or 106) is subjected to a stress greater than that to which the other shape memory alloy wire (106 or 104) is subjected, in order to reduce the stress on the first-mentioned shape memory alloy wire. The invention further relates to a fastener (60) including a stud (54) having a locking cavity (56), an aperture (58) adapted to receive the stud (54), a locking means (teeth) (62) adapted to engage the locking cavity (56), a shuttle (66) rotatable by a rotating means including material adapted to contract when activated and a plug (87) slidable within the shuttle (66) to close off the aperture (58) when not occupied by the stud (54). The shuttle (66) is rotatable by the rotating means between a locking position, in which the locking means (teeth) (62) engages the locking cavity (56), and an unlocking position in which the locking means (teeth) (62) does not engage the locking cavity (56). The plug (87) can help to prevent contamination of the fastener (60).

Cette invention concerne un dispositif stabilisant (120) pour un assemblage comprenant deux câbles en alliage à mémoire de forme (104, 106) conçus pour un fonctionnement conjoint. Le dispositif stabilisant (120) comprend une plaque pivotante (108) à fixer à chaque câble en alliage à mémoire de forme, ladite plaque (108) étant conçue pour pivoter lorsque l~un des câbles (104 ou 106) fait l~objet d~une tension supérieure à celle appliquée au second (106 ou 104), afin de réduire la tension exercée sur le premier câble. Cette invention concerne également un organe de fixation (60) avec une tige (54) doté d~une cavité de verrouillage (56), un orifice (58) destiné à recevoir la tige (54), un moyen de verrouillage (dents) (62) conçu pour s~emboîter dans la cavité de verrouillage (56), une navette (66) que peut faire pivoter un moyen de rotation avec une pièce contractile en cas d~activation, et un bouchon (87) coulissant dans la navette (66) pour obturer l~orifice (58) lorsqu~il ne reçoit pas la tige (54). La navette (66) peut pivoter sous l~action du moyen de rotation entre une position verrouillée, où le moyen de verrouillage (dents) (62) s~emboîte dans la cavité de verrouillage (56), et une position déverrouillée, où ledit moyen (62) ne s~emboîte pas dans cette cavité (56). Le bouchon (87) permet d~éviter toute altération de l~organe de fixation (60).

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