Hinge joint for use in the seats of motor vehicles and the like

Details Hinge joint for use in the seats of motor vehicles and the like Hinge joint for use in the seats of motor vehicles and the like

1992-06-16

1994-05-17

Dorner, Kenneth J.

Chairs and seats

Movable back

Tiltable

B60N 222

Patent

active

053121589

ABSTRACT:
A hinge joint for use between the body supporting portion and the pivotable back rest of a seat has a first leaf which is affixed to the body supporting portion, a second leaf which is affixed to the back rest, and a pintle which pivotably connects the second leaf to the first leaf. In order to reduce friction during pivoting of the second leaf, the latter is provided with a sleeve-like central portion which is surrounded by an antifriction bearing installed in the cylindrical portion of a cupped motion transmitting member of the pintle. A smaller-diameter portion of the motion transmitting member is surrounded by two wedge-like arcuate sections which are biased by a torsion spring against a cylindrical internal surface of the first leaf to reduce radial play between the leaves. Friction between the external surfaces of the sections and the internal surface can be reduced by coating some or all of these surfaces with a lubricant. Such lubricant can also be used between the internal surface of the first leaf and an annular centering element which is installed within the first leaf axially adjacent the sections. In addition, friction between the centering element and the first leaf can be reduced by providing the internal surface of the first leaf and/or the external surface of the centering element with facets and/or recesses.

REFERENCES:
patent: 4371207 (1983-02-01), Wilking
patent: 4563039 (1986-01-01), Jorg
patent: 4786110 (1988-11-01), Mahling
patent: 5154475 (1992-10-01), Kafitz

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