Patent ID: 9585479
Date: 2017-03-07
CPC Classifications: A47C

Claim:
1. In a chair having a seat having a back portion and a seat pan portion, the seat pan portion being connected to the back portion and to a pivotable support structure, and thereby to a base, a mechanism in the seat pan portion, the mechanism comprising: a generally closed track defined in the seat pan portion, a front end of the track having a first attachment point; a plunger attached to a front portion of the pivotable support structure, the plunger disposed in the track and slideable therein, the plunger being pivotally mounted for pivotal rotation when torsional deflection of the seat pan portion occurs, a front end of the plunger having a second attachment point; and a spring disposed in the track connected at opposing ends to the first attachment point and to the second attachment point, wherein as the back portion is tilted backward such that the back of the seat pan portion is pulled backward and downward with the back portion against the pivotable support structure, the spring of the mechanism is compressed between the first attachment point and the second attachment point; and when tilting force is removed, the spring returns the seat pan portion and thereby the back portion into neutral orientation, wherein the mechanism does not extend or protrude outside of the seat pan.