Ergonomic chair backrest

Details Ergonomic chair backrest Ergonomic chair backrest

2007-06-05

2007-06-05

Dunn, David R. (Department: 3636)

Chairs and seats

Bottom or back with means to alter contour

C297S296000, C297S297000, C297S285000, C297S291000, C297S284400

Reexamination Certificate

active

11314798

ABSTRACT:
A “task” chair intended primarily for a person working at a computer terminal has a back provided with a pair of upright struts that incorporate respective parallelogram linkages operative to increase the curvature of the lumbar region of the seat back while at least substantially maintaining the contour of the upper region of the backrest when a person leans back in the chair.

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patent: 7118176 (2006-10-01), Erker
patent: 20 2004 005 169.9 (2004-03-01), None

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