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. 16, 2002
Filed:
May. 14, 1999
Applicant:
Inventors:
Lars Jörnéus, Frillesås, SE;
Halvar Hanssen, Göteborg, SE;
Assignee:
Nobel Biocare AB, Gothenburg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C 3/00 ; A61C 8/00 ;
U.S. Cl.
CPC ...
A61C 3/00 ; A61C 8/00 ;
Abstract
A system which provides a range of dental screws. The same screw tightener is used to tighten different screws, of different constructions. Each screw is provided with an internal recess which operates with the screw tightener. The recess has elements extending inward toward the center axis of the screw which cooperate with the screw tightener. Bearing capacity is provided by a wedging action between the screw tightener and recess, and a driving function occurs through actually extending elements within the recesses.