Adjustable lumbar support

Details Adjustable lumbar support Adjustable lumbar support

1984-03-01

1989-03-14

Dorner, Kenneth J.

Chairs and seats

Bottom or back with means to alter contour

A47C 746

Patent

active

048119865

ABSTRACT:
A lumbar support structure of the present invention includes a cam means rotatably supported on bracket to which one end of torsion spring is pivoted. The cam means is actuated by a lever on the side of the seatback to vertically move the lumbar support through cable member connecting the two. The lumbar support structure further includes a cam member pivoted to the bracket and movable in response to caming action of the cam means, and the support plate which is adjustably rotated upon the movement of cam member so that the support plate may be vertically movable to change the contact position with the seatback.

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patent: 4449751 (1984-05-01), Murphy et al.
patent: 4576410 (1986-03-01), Hattori

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