Backrest

Details Backrest Backrest

1979-12-06

1982-02-23

Zugel, Francis K.

Chairs and seats

Bottom or back with means to alter contour

297460, A47C 746

Patent

active

043166318

ABSTRACT:
A curved backing insert is held in a backrest frame and adjustable to conform to the spine of a person leaning against the backrest. The backing insert comprises at least one elastic bow having a first end supported by said frame, a second end vertically spaced from said first end, and an intermediate vertex portion including a vertex. First stressing means are adjustable to move said second end so as to change the height and curvature of said bow. Second stressing means are adjustable to adjust said vertex relative to said first and second ends.

REFERENCES:
patent: 2756809 (1956-07-01), Endresen
patent: 2843195 (1958-07-01), Barvaeus
patent: 2942651 (1960-06-01), Binding
patent: 3378299 (1968-04-01), Sandor
patent: 3724144 (1973-04-01), Schuster
patent: 3762769 (1973-10-01), Poschl
patent: 4153293 (1979-05-01), Sheldon
patent: 4156544 (1979-05-01), Swenson et al.

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