Flexible membrane back support

Details Flexible membrane back support Flexible membrane back support

1996-02-02

1999-02-09

Brown, Peter R.

Chairs and seats

Bottom or back with means to alter contour

Providing support for lower back region

A47C 746, B60N 222

Patent

active

058684662

ABSTRACT:
A seat (10) includes a backrest portion (16) and a seat portion (14) for supporting a cushion (12). The backrest portion (16) includes a back frame (18) which supports an expansion bladder (28) for expanding and retracting to provide lumbar support. A longitudinal plate (34) is fixedly connected to the frame (18) at a first end (36) and placed over the bladder (28) to provide lumbar support in response to selective expansion of the bladder (28). A second end (38) of the plate (34) is slidably connected within a rotatable member (46). The rotatable member (46) allows bending of the second end (38) to provide thoracic support separate from the lumbar support.

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patent: 5190348 (1993-03-01), Colasanti
patent: 5344211 (1994-09-01), Adat et al.

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