Irreversible continuous pivotal connection

Details Irreversible continuous pivotal connection Irreversible continuous pivotal connection

1989-02-14

1991-01-22

Reese, Randolph A.

Chairs and seats

Movable back

Tiltable

403 91, 403 92, 403 93, B16N 106

Patent

active

049866028

ABSTRACT:
An irreversible continuous pivotal connection between a fixed part and a movable part includes a fixed side plate fixed with respect to the fixed part and having an arcuate array of teeth, as well as a movable side plate fixed with respect to the movable part and having an arcuate array of teeth. The movable side plate is mounted parallel to the fixed side plate for rotation about a fixed common axis. A planet gear is positioned between the fixed and movable side plates, and has two external arcuate arrays of teeth with different diameters and locally meshing with the arcuate arrays of teeth of the fixed and movable side plates. An eccentric member is mounted for rotation about the fixed axis and presses on the planet gear so that rotation of the eccentric member in one direction causes epicyclic rotation of the planet gear in another direction. A locking disk is rotatably fixed relative to the eccentric member and is positioned between the planet gear and one of the fixed and movable side plates, so that a torque applied to the movable side plate with respect to the fixed axis causes a wall of the planet gear facing that of the locking disc to rock from an initial plane by an amount sufficient to come into locking contact locally against the wall of the locking disc.

REFERENCES:
patent: 3779655 (1973-12-01), Toyota
patent: 4211451 (1980-07-01), Shepard
patent: 4345792 (1982-08-01), Shepard
patent: 4371207 (1983-02-01), Wilking et al.
patent: 4668013 (1987-05-01), Wahlmann
patent: 4781416 (1988-11-01), Johnson et al.
patent: 4887863 (1989-12-01), Caillol

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