Chair member

Details Chair member Chair member

1989-04-10

1989-12-26

Dorner, Kenneth J.

Chairs and seats

Bottom or back

Framework

297DIG1, 5464, A47C 702

Patent

active

048893870

ABSTRACT:
A chair member for promoting correct posture. The chair member may form the chair seat or back rest or it may be a portable cushion. It includes a forward support portion of relatively high density resilient material and an adjacent rear support portion of relatively low density resilient material. In the seat embodiment, differential deformation of the two regions locates an occupant's ischial tuberosity behind the forward support portion which thereby resists forward movement of the sitter from the chair. The seat is preferably inclined.

REFERENCES:
patent: 1447288 (1923-03-01), Emmerich
patent: 1843893 (1932-02-01), Becher
patent: 3009172 (1961-11-01), Eidam
patent: 3305878 (1967-02-01), Hellbaum
patent: 3446532 (1969-05-01), Cramer
patent: 3751111 (1973-08-01), Taylor et al.
patent: 4190697 (1980-02-01), Ahrens
patent: 4265484 (1981-05-01), Stalter
patent: 4521053 (1985-06-01), de Boer
patent: 4522447 (1985-06-01), Snyder et al.
patent: 4589699 (1986-05-01), Dungan
patent: 4650249 (1987-03-01), Serber

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