US Patent No. 10,136,924

POLYAXIAL BONE SCREW


Patent No. 10,136,924
Issue Date November 27, 2018
Title Polyaxial Bone Screw
Inventorship David D. Konieczynski, Needham, MA (US)
Thomas V. Doherty, Irvine, CA (US)
Dale E. Whipple, Ackworth, GA (US)
Niall Casey, San Diego, CA (US)
Mark T. Hall, Bridgewater, MA (US)
Assignee DePuy Synthes Products, Inc., Raynham, MA (US)

Claim of US Patent No. 10,136,924

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.