Seatback spring device

Details Seatback spring device Seatback spring device

1990-03-13

1992-03-03

Brown, Peter R.

Chairs and seats

Bottom or back with means to alter contour

297284R, 297284C, 297460, A47C 746

Patent

active

050926543

ABSTRACT:
In order to realize that a seatback spring device can fit to the curvature of the back of an occupant, a sheet, preferably in the form of fabric, which is deformable in all directions is employed and is provided on a frame. Adjustable tension applying means are provided to adjust the seatback in both the lumbar area, and the shoulder area.

REFERENCES:
patent: 3973797 (1976-08-01), Obermeier et al.
patent: 4077669 (1978-03-01), Fox
patent: 4458943 (1984-07-01), Krakauer
patent: 4492408 (1985-01-01), Lohr
patent: 4583783 (1986-04-01), Kanai
patent: 4697848 (1987-10-01), Hattori et al.
patent: 4761035 (1988-08-01), Urai
patent: 4883320 (1989-11-01), Izumida et al.
patent: 4895412 (1990-01-01), Deley et al.
patent: 4938529 (1990-07-01), Fourrey

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