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:
Jul. 31, 2001
Filed:
Nov. 20, 1998
Applicant:
Inventors:
Paul M. Sand, Roseville, MN (US);
Adam Shinbrot, St. Louis Park, MN (US);
Assignee:
Sulzer Spine-Tech, Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B 1/350 ;
U.S. Cl.
CPC ...
B25B 1/350 ;
Abstract
A tool for extracting broken or otherwise damaged screws from bone or wood includes an elongated shaft having a tool engaging head on an upper end to allow rotational force to be applied. The other end includes an opening which includes tapered cutting threads that are sized to initially pass over the screw to be removed which will cut into and hold onto the screw upon turning the tool opposite to the threads of the screw. The other end opening defines a hole saw which will cut away the bone or wood around the screw to allow the inner cutting threads to engage the screw.