Chair control

Details Chair control Chair control

1992-01-14

1994-06-14

Dorner, Kenneth J.

Chairs and seats

Back movement resiliently opposed in operating position

Back secured to resilient upright bar or rod

297285, 297300, A47C 300

Patent

active

053204107

ABSTRACT:
A chair control includes a flexible truss having tandem springs interconnected in spaced relation so that they interact to provide a unique torque versus displacement profile during flexing, with a portion of one of the springs moving longitudinally relative to a portion of the other spring as they are flexed. A stop on the springs limits the longitudinal movement, thereby limiting the angle of tilt both in the upright and rearward chair back positions. In one form, the springs are pairs of leaf springs connected in tandem and operably attached to a chair back and bottom formed by a corrugated member. In another form, one of the springs is a flexible shell forming a chair with the other spring attached thereto in a nested arrangement. In yet another form, the flexible truss is a separate module installable in furniture as a self-contained energy absorber.

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