Back rest

Details Back rest Back rest

1984-08-08

1986-02-25

McCall, James T.

Chairs and seats

Padded stool

Hassock type

5432, A47C 702

Patent

active

045725780

ABSTRACT:
Back rest having a semi-rigid frame having the shape, in longitudinal section, of a shallow S formed by an upper concave portion and a lower convex portion, a cervical support affixed to and projecting from the upper end of the frame, a thoracic support extending downwardly from the cervical support along the median line of the frame, a lumbo-sacral support extending downwardly from the thoracic support, said thoracic and lumbo-sacral supports being formed with a groove to receive bony spinal prominences, and a kidney support on each side of that frame, said supports being of foam material.

REFERENCES:
patent: 1673433 (1928-06-01), Wheeler et al.
patent: 1937920 (1933-12-01), Smith
patent: 2970638 (1961-02-01), Halter
patent: 3361471 (1968-01-01), Radford
patent: 3606464 (1971-09-01), Arbuthnot
patent: 4189182 (1980-02-01), Rhoe
patent: 4300249 (1981-11-01), Taylor
patent: 4383713 (1983-05-01), Roston
patent: 4500133 (1985-02-01), Nakao
patent: 4535495 (1985-08-01), Oldfield

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