Height adjustable work chair having a non-swivel seat

Details Height adjustable work chair having a non-swivel seat Height adjustable work chair having a non-swivel seat

1997-09-08

2000-09-12

Barfield, Anthony D.

Chairs and seats

Movable bottom

Bottom and back movable as a unit

248404, A47C 330, A47C 340

Patent

active

061166901

ABSTRACT:
A non-swiveling height adjustable work chair comprises a seat, a base, and a non-swiveling height adjustment column disposed intermediate the base and the seat. The height adjustment column comprises at least two telescoping height adjustment mechanisms, wherein the telescoping height adjustment mechanisms secure the seat against rotation in relation to the chair base. The chair additionally comprises a lever to actuate the height adjustment mechanisms. The height adjustment column may typically comprise a single stand tube having a first and a second end, wherein the first end is attached to the chair base and extends vertically therefrom, and the second end includes at least two holes through which the telescoping height adjustment mechanisms pass. Or, the height adjustment column may comprise at least two stand tubes each having a first and a second end, wherein the first end is attached to the chair base and extends vertically therefrom, and wherein the second end includes a hole through which the telescoping height adjustment mechanism passes. Each telescoping height adjustment mechanism utilized in the work chair typically comprises a gas spring. The gas springs comprise a cylinder; a piston disposed within the cylinder and extending downwardly therefrom to a secured position on the chair base from where it supports the gas spring; a gas flow control valve disposed within the cylinder; and a pressurized gas disposed within the cylinder.

REFERENCES:
patent: 1999848 (1935-04-01), Ries
patent: 2216348 (1940-10-01), Hunsicker
patent: 2923344 (1960-02-01), La Voie et al.
patent: 4408801 (1983-10-01), Edel et al.
patent: 4934723 (1990-06-01), Dysarz
patent: 5078351 (1992-01-01), Gualtieri
patent: 5437236 (1995-08-01), Zeiner

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