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:
Nov. 01, 2011
Filed:
Sep. 07, 2007
Applicant:
Brian E. Dalton, Erie, PA (US);
Inventor:
Brian E. Dalton, Erie, PA (US);
Assignee:
Aesculap Implant Systems, LLC, Center Valley, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 17/86 (2006.01); A61F 2/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bone fixation screw includes a threaded screw shank and a screw head having upper and lower ends. The screw head lower end is secured to a proximal end of said screw shank. The screw head has substantially frustospherical shaped side surfaces and is split into segments at one of the ends. The head is radially expandable at the one end. An expansion screw is centrally received in the screw head. An interface between the expansion screw and the screw head forms a cam mechanism for expanding the screw head upon axial rotation of the expansion screw.