Adjustable backrest

Details Adjustable backrest Adjustable backrest

1994-06-30

1996-09-10

Brown, Peter R.

Chairs and seats

Supplemental back

Including a means to adjust supplemental back relative to a...

2972841, 2972844, 2972849, A47C 746

Patent

active

055539173

ABSTRACT:
An adjustable backrest for supporting a human back comprising a spine member; a lumbar support member projecting from the spine member; a back pad resting on the lumbar support member for supporting the human back; means for adjusting curvature of the lumbar support member and means for adjusting curvature of different portions of the back pad to accommodate different shapes of the human back; means for providing side-to-side mobility of the back pad to accommodate twisting movement of the human back.

REFERENCES:
patent: 2756809 (1956-07-01), Endresen
patent: 3608960 (1971-09-01), Sherman
patent: 4321044 (1982-03-01), Kron
patent: 4647066 (1987-03-01), Walton
patent: 4981325 (1991-01-01), Zacharkow
patent: 5228747 (1993-07-01), Greene

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