Seat backrest having an adjustable lumbar support

Details Seat backrest having an adjustable lumbar support Seat backrest having an adjustable lumbar support

1978-12-26

1980-01-08

Zugel, Francis K.

Chairs and seats

Bottom or back with means to alter contour

A47C 746, A47C 300

Patent

active

041825330

ABSTRACT:
A seat backrest having an upholstered cushion portion supported by a rigid frame portion includes means to produce a desired supporting contour in the lumbar region of the seat occupant. The contour-producing means includes a lumbar pad, resiliently biased pivoted arm members connecting the lumbar pad to the frame through a toggle linkage, and handle means operable from the side of the backrest for adjustably positioning the lumbar pad in a plurality of fixed positions forward of the frame.

REFERENCES:
patent: 2550831 (1951-05-01), Lingenfelter
patent: 3550953 (1970-12-01), Neale
patent: 3565482 (1971-02-01), Blodee
patent: 3807794 (1974-04-01), Beyer
patent: 3948558 (1976-04-01), Obermeier et al.

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