Spring biased inertial latch for vehicle seat assemblies

Details Spring biased inertial latch for vehicle seat assemblies Spring biased inertial latch for vehicle seat assemblies

1992-11-12

1994-09-13

Bradley, P. Austin

Chairs and seats

Movable back

Tiltable

29721614, 29737811, B60N 202

Patent

active

053462815

ABSTRACT:
A low cost, light-weight inertial latching mechanism for use in latching an automotive vehicle seatback member with respect to a cooperating seat member under collision or collision-like conditions wherein high acceleration or deceleration of the vehicle occurs, is disclosed. The latching mechanism has first and second hinged members pivotally mounted on the seat and seatback members about a common first pivot. The first hinged member has a gear rack adapted to engage a pawl means that is mounted on the second hinged member. The pawl means moves between a first latched position, a second transitional position, and a third unlatched position. A spring means is operationally interconnected between the second hinged member and the pawl means and is adapted to bias the pawl means toward said third unlatched position until forces of acceleration or deceleration above a design threshold value occur. Above that value, the inertial forces of the pawl means cause relative movement of the pawl means past the second transitional position toward the first latched position. In this first latched position, the pawl means engages the gear rack to latch the first hinged member with respect to the second hinged member.

REFERENCES:
patent: 3405971 (1968-10-01), Kobrelel
patent: 4103967 (1978-08-01), Tanka
patent: 4118067 (1978-10-01), Tanaka
patent: 4165128 (1979-08-01), Strowick
patent: 4366984 (1983-01-01), Klueting
patent: 4634182 (1987-01-01), Tanaka
patent: 5163736 (1992-11-01), Aljundi

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