The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 2010
Filed:
Dec. 17, 2004
Gene Newcomb, Plymouth, MN (US);
Craig Hahne, Maple Grove, MN (US);
Jason Piehl, Apple Valley, MN (US);
Kevin V. Guenther, Carver, MN (US);
Gene Newcomb, Plymouth, MN (US);
Craig Hahne, Maple Grove, MN (US);
Jason Piehl, Apple Valley, MN (US);
Kevin V. Guenther, Carver, MN (US);
Zimmer Spine, Inc., Minneapolis, MN (US);
Abstract
A self-drilling bone screw includes a screw body centered on a longitudinal axis and having an external thread winding. The bone screw has a head portion at one end of the screw body and a drill point at the other end. The drill point has two blades, each having a cutting lip and a primary relief surface trailing from the cutting lip. The two blades defining a flute between them. The flute has an opening to the side of the screw body, which opening spans an obtuse angle, such as about 120°, about the longitudinal axis. The primary relief surfaces have a lip relief angle of about 30°. The drill point has a point angle of about 100°.