US 11,051,624 B1
Twistable chair backrest frame
Yu-Ling Wu, Tainan (TW); Armin Roland Sander, Furth (DE); and Cyrille Jehan Charier, Nuremberg (DE)
Assigned to Comfordy Co., Ltd., Tainan (TW)
Filed by COMFORDY CO., LTD., Tainan (TW)
Filed on Feb. 27, 2020, as Appl. No. 16/802,931.
Int. Cl. A47C 7/44 (2006.01); A47C 3/025 (2006.01); A47C 3/026 (2006.01)
CPC A47C 7/44 (2013.01) 11 Claims
OG exemplary drawing
 
1. A twistable chair backrest frame, made from a flexible material, comprising:
a first rod part longitudinally disposed at a right side thereof;
a second rod part longitudinally disposed at a left side thereof and opposite to the first rod part;
a third rod part horizontally disposed at an upper side thereof for connecting an upper end of the first rod part and an upper end of the second rod part;
a fourth rod part horizontally disposed at a lower side thereof for connecting a lower end of the first rod part and a lower end of the second rod part;
a hollow section defined by the first, second, third and fourth rod parts;
a first elastic supporting rib integrally formed at the first rod part and located at a right side of the hollow section, the first elastic supporting rib having a center part bent toward the a center of the hollow section and protruded from a rear side of the twistable chair backrest frame; and
a second elastic supporting rib integrally formed at the second rod part with respect to the first elastic supporting rib and located at a left side of the hollow section, the second elastic supporting rib having a center part bent toward the a center of the hollow section and protruded from a rear side of the twistable chair backrest frame.