Chairs and seats – Bottom or back with means to alter contour
Patent
1990-08-20
1991-12-31
Dorner, Kenneth J.
Chairs and seats
Bottom or back with means to alter contour
297284C, 297DIG3, A47C 300
Patent
active
050766430
ABSTRACT:
A lumbar support assembly for a seat having a seat frame and a backrest. The assembly (10) includes a rigid mounting member (18) within the seat frame (14) supported by a plurality of springs (28) or alternatively by integral clips (58). A pneumatic bladder (32) is supported on the mounting member (18) by a plurality of fasteners (61). A contoured plate (42) is disposed adjacent the mounting member (18) and the bladder (32) is supported between the contoured plate (42) and the mounting member (18), as the bowed contoured plate (42) urges the bladder (32) toward the inflated position. A plurality of guides (30) are disposed upon the mounting member (18) and are adapted to slideably receive a plurality of fingers (56) integrally disposed on the contoured plate (42). A pneumatic tube (34) extends from the bladder (32) to a normally closed pneumatic control valve (36) which is attached to any remote location. Upon opening of the valve (36) the inflated bladder (32) adjusts toward a deflated state as air is released in response to force being applied to the backrest (16) allowing for incremental adjustments in contour.
REFERENCES:
patent: 3326601 (1967-06-01), Vanderbilt et al.
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patent: 4516568 (1985-05-01), Baxter et al.
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patent: 4909568 (1990-03-01), Dal Monte
Colasanti Arduino
Zimmer Paul J.
Bonifanti J.
Dorner Kenneth J.
Lear Seating Corporation
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