US 12,433,411 B2
Chair including a leaf spring in contact with a linkage to provide resistance to tilting of a backrest of the chair
Aaron DeJule, River Forest, IL (US); Paul C. Evans, Emmet, MI (US); and Scott Padiak, River Forest, IL (US)
Assigned to Aaron DeJule, River Forest, IL (US)
Filed by Aaron DeJule, River Forest, IL (US)
Filed on Apr. 2, 2024, as Appl. No. 18/625,135.
Application 18/625,135 is a continuation of application No. 18/348,515, filed on Jul. 7, 2023, granted, now 11,950,710.
Application 18/625,135 is a continuation of application No. 18/348,564, filed on Jul. 7, 2023, granted, now 11,998,118.
Application 18/625,135 is a continuation of application No. 18/348,596, filed on Jul. 7, 2023, granted, now 11,944,210.
Application 18/348,564 is a continuation of application No. 18/134,012, filed on Apr. 12, 2023, granted, now 11,744,374, issued on Sep. 5, 2023.
Application 18/134,012 is a continuation of application No. 18/104,268, filed on Jan. 31, 2023, granted, now 11,744,373, issued on Sep. 5, 2023.
Application 18/104,268 is a continuation of application No. 17/150,679, filed on Jan. 15, 2021, granted, now 11,596,235, issued on Mar. 7, 2023.
Application 17/150,679 is a continuation in part of application No. 16/408,650, filed on May 10, 2019, granted, now 10,893,753, issued on Jan. 19, 2021.
Application 16/408,650 is a continuation of application No. 15/040,735, filed on Feb. 10, 2016, granted, now 10,292,498, issued on May 21, 2019.
Claims priority of provisional application 62/114,706, filed on Feb. 11, 2015.
Prior Publication US 2024/0268560 A1, Aug. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A47C 7/44 (2006.01); A47C 1/032 (2006.01); A47C 31/12 (2006.01)
CPC A47C 7/44 (2013.01) [A47C 1/03266 (2013.01); A47C 1/03277 (2013.01); A47C 7/441 (2013.01); A47C 7/443 (2013.01); A47C 7/445 (2013.01); A47C 7/4454 (2018.08); A47C 31/126 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A chair, comprising:
a backrest;
a seat coupled with the backrest;
a column coupled with the seat;
a linkage statically attached to the backrest and rotatably attached below the seat;
a leaf spring statically attached at one end and in contact with the linkage to provide a resistance to tilting of the backrest relative to the column;
a first structure, wherein a portion of the first structure has an arc shape that includes one or more teeth; and
a second structure in contact with the first structure, wherein a portion of the second structure includes one or more teeth,
wherein the chair is configured such that, when a weight is applied to the seat, the one or more teeth of the second structure move along the one or more teeth of the first structure to provide an increased resistance to tilting of the backrest relative to the column.