Chairs and seats – Movable back – Tiltable
Patent
1988-03-09
1989-05-09
Zugel, Francis K.
Chairs and seats
Movable back
Tiltable
297355, B60N 102
Patent
active
048283223
ABSTRACT:
A hinge joint for use in the seats of motor vehicles to bring about changes of inclination of the back of the seat has a first component which is secured to the body supporting portion of the seat, a second component which is affixed to the back of the seat, and a shaft which has an eccentric cylindrical portion rotatably journalled in the first component and two conical portions which are disposed at opposite axial ends of the cylindrical portion and are received in complementary openings of two spaced-apart sections of the second component. A diaphragm spring biases the shaft axially to urge the conical portions deeper into the respective openings. Eventual changes of orientation of the shaft in response to the application of external stresses to the back during adjustment of its inclination do not entail a pronounced increase of the force which is required to turn the shaft for the purpose of adjusting the inclination of the back because the elastic deformation of component parts of the hinge joint and radial tolerances between the gears of the transmission which is installed between the components are compensated for by large-area contact between the conical portions of the shaft and the respective component. This renders it possible to make the shaft and the components of the hinge joint of less expensive lightweight material.
REFERENCES:
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patent: 4113305 (1978-09-01), Hampton
patent: 4196931 (1980-04-01), Werner
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patent: 4453767 (1984-06-01), Walk et al.
patent: 4504091 (1985-03-01), Ohshiro
patent: 4634181 (1987-01-01), Pipon
patent: 4708392 (1987-11-01), Werner et al.
patent: 4715656 (1987-12-01), Walk et al.
Wagener Heinz J.
Walk Hansjorg
Keiper Recaro GmbH & Co.
Kontler Peter K.
Zugel Francis K.
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