US 10,136,924 B2
Polyaxial bone screw
David D. Konieczynski, Needham, MA (US); Thomas V. Doherty, Irvine, CA (US); Dale E. Whipple, Ackworth, GA (US); Niall Casey, San Diego, CA (US); and Mark T. Hall, Bridgewater, MA (US)
Assigned to DePuy Synthes Products, Inc., Raynham, MA (US)
Filed by DePuy Synthes Products, Inc., Raynham, MA (US)
Filed on Apr. 14, 2017, as Appl. No. 15/488,057.
Application 15/488,057 is a continuation of application No. 15/259,397, filed on Sep. 8, 2016, granted, now 9,655,657.
Application 15/259,397 is a continuation of application No. 14/848,417, filed on Sep. 9, 2015, granted, now 9,463,049, issued on Oct. 11, 2016.
Application 14/848,417 is a continuation of application No. 14/157,081, filed on Jan. 16, 2014, granted, now 9,155,579, issued on Oct. 13, 2015.
Application 14/157,081 is a continuation of application No. 13/657,486, filed on Oct. 22, 2012, granted, now 8,663,288, issued on Mar. 4, 2014.
Application 13/657,486 is a continuation of application No. 12/698,612, filed on Feb. 2, 2010, granted, now 8,313,516, issued on Nov. 20, 2012.
Application 12/698,612 is a continuation of application No. 11/381,048, filed on May 1, 2006, granted, now 7,682,377, issued on Mar. 23, 2010.
Application 11/381,048 is a continuation of application No. 10/608,904, filed on Jun. 27, 2003, granted, now 7,087,057, issued on Aug. 8, 2006.
Prior Publication US 2017/0215924 A1, Aug. 3, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/70 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7032 (2013.01); A61B 17/7035 (2013.01); A61B 17/8605 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A polyaxial bone anchor assembly, comprising:
a shank having a spherical head formed on a proximal end thereof;
a receiver member adapted to receive a spinal rod and having a distal opening though which the shank extends and a distal seat in which the head of the shank is polyaxially seated; and
a compression cap that is spring biased in a distal direction relative to the receiver member such that the compression cap exerts distal pressure on the spherical head of the shank to frictionally engage the spherical head of the shank.