Patent ID: 9661930
Date: 2017-05-30
CPC Classifications: A47C,B60N

Claim:
1. A chair back assembly, comprising: a substantially rigid peripheral frame defining a central opening; and a substantially flexible back shell coupled to the peripheral frame and spanning at least a portion of the central opening, wherein a first portion of the back shell is fixed with respect to movement in a lateral direction, in a vertical direction and in a forward and rearward direction with respect to the frame at a first position, a second portion of the back shell is fixed with respect to movement in a lateral direction, in a vertical direction and in a forward and rearward direction with respect to the frame at a second position that is different than the first position, a third portion of the back shell is constrained with respect to the frame in at least one direction of motion at a third position located between the first position and the second position, and wherein a fourth portion of the back shell is free from constraint with respect to the frame in a lateral direction and in a forward and rearward direction at a fourth position located between the third position and the second position such that the fourth portion of the back shell is flexible in at least the lateral direction.