Trigger device for chain brake

B - Operations – Transporting – 27 – B

Patent

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Details

B27B 19/00 (2006.01) B27B 17/08 (2006.01)

Patent

CA 2395182

A brake triggering device with a pivotably mounted trigger arm (1) located in connection to a handheld working tool's, mainly a chain saw's (2), rear handle (3), with a throttle control (4) and a handle opening (5) located below the handle (3), so that the trigger arm (1), when the saw changes inclination in relation to the operator's forearm, e.g. at the event of kickback or fall, is actuated by the operator's hand or arm, whereby the trigger arm (1) via a transfer mechanism actuates a brake (9) so that this stops the movement of the saw chain. The pivot (10) of the trigger arm is located in connection to a front (11) or a bottom (12) side of the handle opening (5).

L'invention concerne un dispositif de déclenchement de freinage comprenant un bras déclencheur (1) monté pivotant et relié à un outil à main, notamment une scie à chaîne (2), une poignée arrière (3) dotée d'un levier d'accélération (4) et une ouverture de poignée (5) située sous la poignée (3), de telle façon que lorsque la scie change d'inclinaison par rapport à l'avant-bras de l'utilisateur, notamment en cas de mouvement brusque ou de chute, le bras déclencheur (1) est actionné par la main ou le bras de l'utilisateur, actionnant ainsi à son tour un frein (9) via un mécanisme de transfert (6, 7, 8, 40), de telle façon le mouvement de la chaîne de scie s'arrête. Le pivot (10) du bras déclencheur est situé en relation avec une face avant (11) ou une face inférieure (12) de l'ouverture de poignée (5).

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