Patent ID: 9655455
Date: 2017-05-23
CPC Classifications: A47C

Claim:
1. A chair comprising: a seat assembly; and a support assembly adapted to be supported on a floor; wherein the seat assembly has a body disposed about an axis that provides a resilient convex seating surface, the seat assembly has a shell at least partially surrounding the body and supported on the support assembly, and the shell has a boss extending radially outward from and connected to the shell for rotation of the body and the shell; wherein the support assembly retains the seat assembly when occupied by a user, the seat assembly is supported by the support assembly above the floor on which the support assembly is supported and is free to rotate about its axis and additionally allows the seat assembly to tilt to cause limited tilt displacement of the axis from a neutral alignment; the support assembly including a biasing device urges the seat assembly towards the neutral alignment when the seat assembly is tilted from the neutral alignment; wherein the biasing device includes a plurality of elongated elastomeric members that are connected by respective first ends of the elongated elastomeric members to the boss of the seat assembly and by respective second ends of the elongated elastomeric member to respective locations on the support assembly to apply a balanced force to the seat assembly when the axis is in a neutral alignment.