Seat apparatus for vehicles

Chairs and seats – Movable back – Tiltable

Patent

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Details

297367, B60N 202

Patent

active

052498409

ABSTRACT:
A seat apparatus for an automotive vehicle includes an upper gear fixed to a side member of a seat-back frame equipped with a retractor, a lower gear engaging with the upper gear, a pair of lower arms embracing the upper gear and the lower gear, a shaft having a coaxial shaft portion on which the pair of lower arms is supported and an eccentric shaft portion on which the upper gear is supported, a release arm supported on the coaxial shaft portion and having a distal end to which a first pin is fixed, the first pin being inserted into first registered oblong holes of the pair of lower arms, a second pin passed through a cam slot of the release arm and second registered oblong holes of the pair of lower arms, the second pin being capable of freely entering and exiting a notch in the lower gear, and a third oblong hole provided in the lower arm for receiving a third pin fixed to the upper gear. At the moment of a collision, a large load from the upper gear is received by the second pin as a shearing force.

REFERENCES:
patent: 3973799 (1976-08-01), Berg
patent: 4382630 (1983-05-01), Weston
patent: 4469375 (1984-09-01), Boyer
patent: 4629251 (1986-12-01), Tezuka
patent: 4660886 (1987-04-01), Terada et al.
patent: 4668013 (1987-05-01), Wahlmann
patent: 4732425 (1988-03-01), Terada et al.
patent: 4997223 (1991-03-01), Croft

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