Device for automatically stopping the fall of personnel...

A - Human Necessities – 62 – B

Patent

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Details

A62B 35/04 (2006.01)

Patent

CA 2231722

The device comprises, inside a case, a tightening cam (7) hinged about an axis (8) such that, unused, it does not engage a belaying rope (2) passing through the case and, when the device is subjected to a set acceleration downwards, it pivots towards the rope (2) to tighten it to the case with self-tightening effect. On the cam (7) is mounted a detecting roller (10) which co-operates with the rope (2) when the cam (7) is unused. A spring actuated (13) friction piece (12), at a certain rotational speed of the roller (10), subjects it to a resisting moment which triggers off the pivoting of the cam (7) in the tightening direction. A lever (15), to which the user is linked, engages in a unidirectional manner the cam (7) to push it in tightening position if the user falls. The device simultaneously triggers off several tightening effects in case of a fall.

Le dispositif comprend, à l'intérieur d'un bottier, une came de serrage (7) articulée autour d'un axe (8) de façon, au repos, à ne pas engager une corde d'assurage (2) traversant le boîtier et, lorsque le dispositif est soumis à une accélération déterminée vers le bas, à pivoter vers la corde (2) pour serrer celle-ci contre le boîtier avec un effet d'autoserrage. Sur la came (7) est monté un galet détecteur (10) qui coopère avec la corde (2) lorsque la came (7) est au repos. Un frotteur (12) à ressort (13), pour une vitesse de rotation donnée du galet (10), soumet celui-ci à un couple résistant qui déclenche le pivotement de la came (7) dans le sens du serrage. Un levier (15), auquel est relié l'utilisateur, engage de façon unidirectionnelle la came (7) pour la pousser en position de serrage en cas de chute de l'utilisateur. Le dispositif assure le déclenchement simultané de plusieurs effets de serrage en cas de chute.

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