Chairs and seats – Movable back – Tiltable
Patent
1997-12-09
1999-03-23
Brown, Peter R.
Chairs and seats
Movable back
Tiltable
29721614, B60N 242
Patent
active
058849726
ABSTRACT:
A latching device provides locking of the backrest of a tilt-adjustable seat in a motor vehicle against undergoing pivotal movement in response to the motor vehicle exceeding a predetermined acceleration value in the longitudinal direction of the motor vehicle. The latching device includes an internal-toothed annular member on a backrest-secured part of a seat articulation which pivotally mounts the backrest to a seat part of the seat, an eccentric inertial weight pivotally supported on a pivot axle of the seat articulation pivotally mounting the backrest-secured part to a seat-secured part of the seat articulation, at least one stop on the inertial weight spaced from the pivot axle, and two locking pawls pivotally supported at least at one center of rotation disposed on the seat-secured part of the seat articulation and having tooth segments capable of lockably engaging with the internal-toothed annular member. At normal acceleration values the locking pawls are held under the action of a spring out of engagement with the internal-toothed annular member. Above a predetermined high acceleration value, such as occurs during a crash, the inertial weight pivots about the pivot axle pressing at least one of the tooth segments of one of the locking pawls into locking engagement with the internal-toothed annular member, thereby securing the backrest from undergoing pivotal movement responding to the occurrence of the high acceleration value.
REFERENCES:
patent: 4707010 (1987-11-01), Croft et al.
patent: 4997223 (1991-03-01), Croft
patent: 5346281 (1994-09-01), Hughes
patent: 5507553 (1996-04-01), Nishizawa et al.
Bertrand Faure Sitztechnik GmbH & Co. KG
Brown Peter R.
Flanagan John K.
Flanagan John R.
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