Seat having a movable lumbar support

Details Seat having a movable lumbar support Seat having a movable lumbar support

1979-11-13

1982-02-02

Zugel, Francis K.

Chairs and seats

Bottom or back with means to alter contour

A47C 746

Patent

active

043136370

ABSTRACT:
The invention relates to a seat having a movable lumbar support. An arcuate lumbar support is mounted on a back rest frame of the seat by a mechanism which is operable to move the lumbar support forwards or backwards or to tilt the lumbar support as its axis moves vertical to effect a rolling action thereby to raise or lower the level at which it supports a seat occupant. A screwthread in the mechanism is spring-supported to reduce shock applied by the lumbar support.

REFERENCES:
patent: 1835048 (1931-12-01), Hottel
patent: 1968232 (1934-07-01), Thomas
patent: 2139028 (1938-12-01), Mensendicck et al.
patent: 2550831 (1951-05-01), Lingenfelter
patent: 2756809 (1956-07-01), Endresen
patent: 2991124 (1961-07-01), Schwarz
patent: 3642319 (1972-02-01), Berchicci
patent: 3880463 (1975-04-01), Shephard et al.
patent: 3890000 (1975-06-01), Easley
patent: 4143293 (1979-05-01), Sheldon
patent: 4148522 (1979-04-01), Sakurada et al.
patent: 4156544 (1979-05-01), Swenson et al.

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