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US 2008/0164731 A1Published application
Vehicle Seat
AssigneeAutoliv Developement AB
InventorsOla Bostrom, Lennart Simonsson
Life of this patent
Estimating the term…
Abstract
A vehicle seat 1 comprises a squab (2) and a backrest (3). The headrest (4) is carried by the backrest. The headrest 4 is provided with a mechanism (7) to move the headrest forwardly in the event that an impact should occur. A locking mechanism (9) is provided to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal. The signal may be generated in response to a rear impact in excess of a predetermined severity.
Claims19
-18. (canceled)
A vehicle seat, comprising:
- a squab;
- a backrest carrying a headrest, the headrest being provided with a mechanism to move the headrest forwardly in the event of a rear impact;
- and
- a locking mechanism carried by the seat and operative to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal.
1 more element
A vehicle seat comprising:
- a squab;
- a backrest;
- a headrest carried by the backrest, the headrest provided with a mechanism to move the headrest forwardly in the event of a rear impact;
- a locking element associated with the headrest and operative to rotate with the headrest as the headrest moves forwardly, the locking element defining a locking groove;
- the mechanism including a locking member moveable, by a pyrotechnic unit in response to a predetermined signal, from an initial position to a locking position, the locking member engaging the groove when in the locking position to lock the locking element and to prevent forward movement of the headrest, the predetermined signal being generated from an output from a head sensor, the predetermined signal being generated by the head sensor when the head of a seat occupant is proximate the headrest.
2 more elements
Dependencies are inferred from the claim text.