Eccentrically rotatable chair

Details Eccentrically rotatable chair Eccentrically rotatable chair

1979-11-19

1983-08-23

Zugel, Francis K.

Chairs and seats

Movable bottom

Interconnected with back for relative concurrent movement

297291, 248416, A47C 318

Patent

active

044000324

ABSTRACT:
A chair for business or home use comprises a rotatable seat supported on a single leg at the bottom of which is a ball bearing caster. The leg is connected by a telescopically extensible arm to a pivot post which projects upwardly from the center of a circular base plate on which the ball bearing caster is adapted to roll as the chair swings around the pivot post. The chair may also have a back rest which is mounted for universal movement on a back support which extends rearwardly from an upper portion of the chair leg and then upwardly. The ball bearing caster comprises a larger ball retained in a socket and resting on a circle of smaller bearing balls so that the larger ball can rotate freely in all directions. Alternatively the ball bearing caster comprises a plurality of balls in a retainer.

REFERENCES:
patent: 693685 (1902-02-01), Case
patent: 937625 (1909-10-01), Mead
patent: 2024045 (1935-12-01), Johnson
patent: 2034509 (1936-03-01), DeHaven
patent: 2212777 (1940-08-01), Jones et al.
patent: 2449385 (1948-09-01), Johnson et al.
patent: 2557232 (1951-06-01), Morgan
patent: 3186761 (1965-06-01), Propst
patent: 4023760 (1977-05-01), Robinson

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