Seat having an adjustable backrest

Details Seat having an adjustable backrest Seat having an adjustable backrest

1981-11-27

1984-01-17

Apley, Richard J.

Surgery

Truss

Perineal

297284, A61H 700

Patent

active

044259107

ABSTRACT:
The seat has a backrest with an adjustable vertebral support comprising two separate adjusting elements which act against the rear of the backrest cushion to vary the curvature and spinal support effect thereof, at two different levels in the heightwise direction of the backrest.

REFERENCES:
patent: 2427053 (1947-09-01), Hampton
patent: 3924613 (1975-12-01), Beck
patent: 4339150 (1982-07-01), McNamara et al.

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