Chair adjustment construction

Details Chair adjustment construction Chair adjustment construction

1974-10-24

1976-04-27

Foss, J. Franklin

Supports

Stand

Standard type

2481885, F16M 1116, A47C 334

Patent

active

039529878

ABSTRACT:
A chair construction of the type including a base with an upstanding supporting tube and a seat with a depending tube telescopically fitted within the upstanding tube, includes an improved height adjustment mechanism for the seat. A manually operated handle or trigger on the upstanding tube has an inclined planar tab that fits into any one of a plurality of slots defined in the depending tube to provide desired seat elevation. The tubes have a hexagonal cross section with complementary wedge surfaces so that the depending tube is guided by the planar tab into wedging engagement with the upstanding tube.

REFERENCES:
patent: 1007322 (1911-10-01), Barnes
patent: 1725312 (1929-08-01), Stoll
patent: 2019753 (1935-11-01), Wittel
patent: 2122868 (1938-07-01), Morgan
patent: 2382291 (1945-08-01), Carlberg
patent: 2542480 (1951-02-01), Cramer et al.

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