US 11,805,905 B2
Chair for active engagement of user
Mark Goetz, Brooklyn, NY (US); Brock Walker, Okemos, MI (US); John Aldrich, Grandville, MI (US); Andy Squires, Grandville, MI (US); Chris Holwerda, Hudsonville, MI (US); and Adwait Bhagwat, Holland, MI (US)
Assigned to MILLERKNOLL, INC., Zeeland, MI (US)
Filed by MillerKnoll, Inc., Zeeland, MI (US)
Filed on Nov. 2, 2022, as Appl. No. 17/979,465.
Application 17/979,465 is a continuation of application No. 17/604,261, granted, now 11,596,232, previously published as PCT/US2020/028319, filed on Apr. 15, 2020.
Claims priority of provisional application 62/834,780, filed on Apr. 16, 2019.
Prior Publication US 2023/0049996 A1, Feb. 16, 2023
Int. Cl. A47C 1/03 (2006.01); A47C 1/032 (2006.01); A47C 7/14 (2006.01); A47C 7/46 (2006.01)
CPC A47C 1/03255 (2013.01) [A47C 1/03274 (2018.08); A47C 7/14 (2013.01); A47C 7/46 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A lower chair for supporting an upper chair on which a user sits, the lower chair comprising:
a base;
a swivel mechanism supported by the base, defining a vertical swivel axis;
a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis, the four-bar linkage including a coupler link that moves about a coupler curve; and
a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve, the column defining a column axis and adapted to support the upper chair.