Lumbar support for seat

Details Lumbar support for seat Lumbar support for seat

1993-06-09

1994-10-04

Dorner, Kenneth J.

Chairs and seats

Bottom or back with means to alter contour

Providing support for lower back region

2972841, A47C 300

Patent

active

053520181

ABSTRACT:
A support shaft has an integral protrusion which is abuttingly engageable with an arcuate portion of a support panel for limiting rotation of the support panel relative to the support shaft. A protrusion is provided at each axial end of the support shaft, while an opening with a slit-like opening portion is provided on each side panel of a seat back frame. The protrusion at each axial end of the support shaft and the opening at each side panel are constructed and arranged so that each axial end is capable of passing through the opening only when the support shaft is held in a particular position. The support shaft is put out of the particular position when in use such that each axial end is prevented from slipping out of the opening.

REFERENCES:
patent: 4564235 (1986-01-01), Hatsutta et al.
patent: 4725095 (1988-02-01), Benson et al.
patent: 4886316 (1989-12-01), Suzuyama et al.

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