US 12,262,923 B2
Polyaxial bone screw with increased angulation
Timmon Ark, Vienna, VA (US); Theo Choi, Arlington, VA (US); and Keenan O'Brien, Grimesland, NC (US)
Assigned to K2M, Inc., Leesburg, VA (US)
Filed by K2M, Inc., Leesburg, VA (US)
Filed on Jan. 13, 2022, as Appl. No. 17/574,783.
Application 17/574,783 is a continuation of application No. 16/661,230, filed on Oct. 23, 2019, granted, now 11,229,459, issued on Jan. 25, 2022.
Application 16/661,230 is a continuation of application No. 15/664,398, filed on Jul. 31, 2017, granted, now 10,610,265, issued on Apr. 7, 2020.
Prior Publication US 2022/0133364 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/70 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/7052 (2013.01) [A61B 17/7032 (2013.01); A61B 17/8605 (2013.01); A61B 17/8685 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bone screw device, comprising:
a screw having a head and a shaft;
a housing defining a bore that extends along a longitudinal axis and a rod-receiving channel extending along a channel axis transverse to the longitudinal axis;
a spring at least partially disposed within the housing and in contact with the head of the screw to apply a friction force to the head of the screw when the head of the screw is received within the housing; and
a pin at least partially disposed within the housing and in direct engagement with the spring.