Seat back latch mechanism

Details Seat back latch mechanism Seat back latch mechanism

1977-07-28

1982-03-09

Lyddane, William E.

Chairs and seats

Movable back

Tiltable

297216, A47C 100, B60N 104

Patent

active

043185690

ABSTRACT:
A seat back latch mechanism for a vehicle seat assembly having a generally horizontal seat structure and an upstanding backrest structure pivotally supported on support arms for tiltable movement over the seat structure. A latch pawl pivotally mounted on one of the structures is maintained in a cam controlled latching attitude relative to a fixed detent on the other of the structures. The latch pawl is constructed and arranged so that its center of gravity normally provides a force couple acting eccentrically of the pawl pivot axis to cause the latter to swing out of the controlled latching attitude in a direction to bypass the detent when moderate force is applied to the seat back structure to tilt the latter over the seat structure.
Upon the occurrence of a vehicular deceleration rate sufficient to overcome the inertia of the seat backrest structure which normally resists tilting movement of the latter over the seat structure, the inertia of the latch pawl becomes a factor in causing the latch pawl to engage the detent to prevent tilting movement of the backrest structure.

REFERENCES:
patent: 2873794 (1959-02-01), Leslie et al.
patent: 3398987 (1968-08-01), Lynn et al.
patent: 3549202 (1970-12-01), Boschen et al.
patent: 3674309 (1972-07-01), Fowler
patent: 3900225 (1975-08-01), Wirtz et al.

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