Seat belt pretensioner

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 22/00 (2006.01) B60R 22/28 (2006.01) B60R 22/36 (2006.01)

Patent

CA 2574891

A pretensioner for a three point seat belt has a cylinder (79) adapted to be attached to a structural member of the vehicle and a piston disposed within the cylinder (79). The piston can move translationally relative to the cylinder (79) in a pretensioning direction. A flexible member (50) is arranged in a curved profile with a seat belt webbing being attached to the flexible member. The flexible member (50) has a first end that can be pulled by the piston and a second end releasably connected to an exterior of the cylinder (79) such that when the piston moves translationally relative to the cylinder (79) the second end of the flexible member (50) moves translationally relative to the cylinder (79) along the exterior of the cylinder (79).

La présente invention concerne un dispositif de pré-tension destiné à une ceinture de sécurité en trois points qui possèdent un cylindre (79) conçu pour être fixé à un élément structurel du véhicule et un piston placé à l'intérieur de ce cylindre (79). Ce piston peut se déplacer par translation par rapport au cylindre (79) dans une direction de pré-tension. Un élément souple (50) est agencé selon un profil incurvé avec un entoilage de ceinture de sécurité fixé à cet élément souple. Cet élément souple (50) possède une première extrémité qui peut être tirée par le piston et une seconde extrémité connectée de manière amovible à l'extérieur du cylindre (79) de sorte que lorsque le piston se déplace par translation par rapport au cylindre (79), la seconde extrémité de l'élément souple (50) se déplace par translation par rapport au cylindre (79) le long de l'extérieur du cylindre (79).

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