About 2 results
https://drivepatents.com/patents/1074778 · 24 Aug 2005
A plate (10) is elastically biased into a curved configuration. An adjusting mechanism (28) reduces the curvature of the plate.
https://drivepatents.com/patents/1102037 · 4 Sep 2002
The curvature of a plastic lumbar support (22) can be adjusted by springs fitted to attachment points (20) on an internal wire reinforcement grid. The longitudinal (14) and transverse (16, 18) members of the grid are placed in the injection molding tool an...