Seat with adjustable back rest

Details Seat with adjustable back rest Seat with adjustable back rest

1988-07-07

1989-06-06

Aschenbrenner, Peter A.

Chairs and seats

Movable back

Tiltable

A47C 124

Patent

active

048366064

ABSTRACT:
A seat for use in a motor vehicle has a base and a back rest which is pivotably connected to the base by two hinge joints each of which has a first leaf connected with the base a second leaf connected to the back rest, and a pintle non-rotatably connected with a discrete lever. The levers have first arms which are received with a certain amount of play in the recess of a hand wheel, and second arms which are acted upon by a spring so as to urge the levers and hence the respective pintles toward predetermined angular positions. This enables the pintles to eliminate play between the mating teeth of gear transmissions which are mounted on the pintles and operate between the leaves of the respective hinge joints. Such elimination of play between mating teeth, and of clearances which are attributable to wear and/or machining or assembling tolerances, is ensured without the need for increasing the magnitude of force which is required to turn the hand wheel in order to change the inclination of the back rest relative to the base of the seat.

REFERENCES:
patent: 4453767 (1984-06-01), Walk et al.
patent: 4563039 (1986-01-01), Jorg
patent: 4708392 (1987-11-01), Werner
patent: 4715656 (1987-12-01), Walk et al.

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