Vehicle seat having hydraulic locking mechanism

B - Operations – Transporting – 60 – N

Patent

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Details

B60N 2/42 (2006.01) B60N 2/08 (2006.01) B60N 2/22 (2006.01) B60N 2/23 (2006.01) B60N 2/433 (2006.01)

Patent

CA 2268118

A vehicle seat (10) includes a seat cushion assembly (12) for supporting an occupant seated thereon and a seat back cushion assembly (14) for supporting the back of an occupant seated on the seat cushion assembly (12). A first mounting assembly (18) is constructed and arranged to mount the seat cushion assembly (12) on a vehicle floor (20) and a second mounting assembly (13) is provided which is constructed and arranged to mount the seat back cushion assembly (14) on the seat cushion assembly (12). An adjusting mechanism (28) is operatively embodied in one of the first and second mounting assemblies (18, 13) and is constructed and arranged to enable the cushion assembly (12, 14) mounted by the one mounting assembly (18, 13) to be moved in opposite directions through a range of adjustable positions with respect to the assembly on which the one mounting assembly mounts the cushion assembly. The adjusting mechanism includes a locking and releasing device (42) constructed and arranged to be moved between (A) a locking position to lock the adjusting mechanism (28) to prevent movement in either direction of the cushion assembly (12, 14) enabled to be moved thereby, and (B) a releasing position to release the adjusting mechanism (28) to permit the cushion assembly (12, 14) enabled to be moved thereby to be manually moved in relatively unrestricted fashion in one direction and returned in relatively unrestricted fashion in the opposite direction. A vehicle crash sensing system (62) is operatively connected with the adjusting mechanism (28) and is constructed and arranged to provide control of the movement of the cushion assembly (12, 14) mounted by the one mounting assembly in response to the sensing of a crash condition which occurs while said locking device (42) is in the releasing position.

Un siège (10) de véhicule comprend un ensemble coussin de siège (12) destiné à supporter un occupant assis dessus, et un ensemble dossier de siège (14) destiné à supporter le dos d'un occupant assis sur l'ensemble coussin de siège (12). Un premier ensemble de fixation (18) est configuré et arrangé pour fixer l'ensemble coussin de siège (12) sur le plancher (20) d'un véhicule, et un second ensemble de fixation (13) est configuré et arrangé pour fixer l'ensemble dossier de siège (14) sur l'ensemble coussin de siège (12). Un mécanisme de réglage (28), fonctionnellement incorporé au premier ou au second ensemble de fixation (18, 13), est configuré et arrangé pour que l'ensemble coussin (12, 14) fixé par l'un des ensembles de fixation (18, 13) puisse se déplacer, sur une plage de positions réglables, dans la direction opposée à l'ensemble sur lequel l'un des ensembles de fixation fixe l'ensemble coussin. Le mécanisme de réglage comprend un dispositif de verrouillage et de déverrouillage (42) configuré et arrangé pour se déplacer entre (A) une position de verrouillage qui verrouille le mécanisme de réglage (28), afin d'empêcher le déplacement ainsi autorisé, dans l'une ou l'autre direction, de l'ensemble coussin (12, 14), et (B) une position de déverrouillage qui libère le mécanisme de réglage (28), afin de permettre le déplacement manuel sensiblement illimité de l'ensemble coussin (12, 14), ainsi autorisé, dans la direction opposée. Un système détecteur d'impact (62) du véhicule, fonctionnellement relié au mécanisme de réglage (28), est configuré et arrangé pour permettre de commander le déplacement de l'ensemble coussin (12, 14) fixé par l'un des ensembles de fixation, en réponse à la détection d'un impact survenant alors que ledit dispositif de verrouillage (42) se trouve en position de déverrouillage.

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