Ergonomic chair

Details Ergonomic chair Ergonomic chair

1979-08-22

1982-02-23

Zugel, Francis K.

Chairs and seats

Back movement resiliently opposed in operating position

Spring centers back on pivot

297306, 248609, 248634, A47C 740

Patent

active

043166326

ABSTRACT:
In order to achieve the necessary flexible curve according to the natural curve of the human spine in the field of back supports, the back support, attached relatively rigidly in its lower section to the seat, is constructed increasingly more flexibly towards the top. So that the desired course of the spine-like curve can also be achieved at the upper end of the shoulder pad connected to the back rest when the chair is "loaded", a spring member which becomes progressively "harder" is mounted in the connecting element between the end of the back rest and the shoulder pad.

REFERENCES:
patent: 158869 (1875-01-01), Streit
patent: 1778024 (1930-10-01), Cowell
patent: 2334618 (1943-11-01), Foscue
patent: 2424753 (1947-07-01), Herold
patent: 2711211 (1955-06-01), Tidcombe
patent: 3544159 (1970-12-01), Andersson
patent: 3826456 (1974-07-01), Tranter et al.
patent: 4007962 (1977-02-01), Muller-Deisig

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