Ergonomically designed chair

Details Ergonomically designed chair Ergonomically designed chair

1976-06-07

1977-06-28

McCall, James T.

Chairs and seats

Movable back

D 6 30, 297300, A47C 300

Patent

active

040321908

ABSTRACT:
The chair has a back rest provided with stiffening means which impart to the back rest a substantially stiff form up to about the level of the sixth lumbar vertebra of the chair occupant, thus ensuring a continuous transition from the chair seat to the back rest, but allow the back rest an increasingly greater flexibility from said level upwards with the result that the upper part of the back rest bends backwards when the occupant leans back, further characterized in that the upper end of the back rest is joined to the shoulder rest via a bracing corrugation in order to ensure that the chair profile in the region of the occupant's shoulder is a smooth curve matching that of the occupant's spine.

REFERENCES:
patent: 2667210 (1954-01-01), Eames
patent: 2731078 (1956-01-01), Cadman et al.
patent: 3133765 (1964-05-01), Kramer
patent: 3309136 (1967-03-01), Kehoe
patent: 3866974 (1975-02-01), Jones
patent: 3883176 (1975-05-01), Morton

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