Chair with adjustment feature

Claim 1

A chair with an automatic adjustment feature including: seat coupled by engaging links to a plurality of support arms for relative pivoting and translational movement with respect thereto, such seat having an upwardly extending rear extension; a back rest providing reclining support for a user of the chair; a pivot lever disposed at either side of the seat, each of such pivot levers having a first end pivotably pinned to a support arm, a second end attached to the back rest and a hinge pin disposed intermediate such ends and coupling the pivot lever to the seat; the backrest being urged by the pivot lever toward the rear extension as the chair moves from an upright to a reclining position and away from the rear extension as the chair moves from a reclining position to an upright position; an element of the self-adjusting type connecting the rear extension and the back rest and permitting relative linear movement between the rear extension and the back rest while yet preventing bending movement therebetween; whereby the distance between the rear extension and the back rest is automatically adjusted as the chair is moved between an upright position and a reclining position.