Chairs and seats – Bottom or back – Framework
Patent
1984-05-29
1988-01-12
Dorner, Kenneth J.
Chairs and seats
Bottom or back
Framework
297459, 5481, A47C 702
Patent
active
047187271
ABSTRACT:
A reversible seat supplement, or seat cushion and/or backrest, includes upper and lower portions which are both contoured, generally concave on one side and convex on the other side; and a keyhole shaped opening including an enlarged opening toward the rear at the base of the spine and the coccyx, and a narrow slot for the anal and urogenital triangle region extending forward to a point more than half way across the seat. Wedge shaped openings angling forward and outward from the central portion of the seat avoid pressure on the sciatic nerves. An optional front vertical opening may be provided to receive a container for a cup of coffee or the like. Bulky material from the seat or the backrest prevent the backrest from flopping forward onto the seat, thus limiting normal folding of the seat back to about 90 degrees from the horizontal seat/pad. The seat back has optional devices to adjust the lumbar pressure. The seat and back portions have a device for alternately combining the reverse sides of the opposite portions to achieve a more personally sizable unit, with the option to use either portion separately as singular reversible unit.
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patent: 4189182 (1980-02-01), Rhoe
Cranmer Laurie K.
Dorner Kenneth J.
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