Invention Grant
- Patent Title: Anti-over tightening bone screw fixing arrangement
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Application No.: US14435102Application Date: 2013-09-20
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Publication No.: US09987064B2Publication Date: 2018-06-05
- Inventor: Harm-Iven Jensen
- Applicant: FACET-LINK INC.
- Applicant Address: US NJ Rockaway
- Assignee: FACE-LINK INC.
- Current Assignee: FACE-LINK INC.
- Current Assignee Address: US NJ Rockaway
- Agency: Morrison & Foerster LLP
- Priority: EP12007011 20121010
- International Application: PCT/EP2013/069584 WO 20130920
- International Announcement: WO2014/056704 WO 20140417
- Main IPC: A61B17/80
- IPC: A61B17/80 ; A61B17/86

Abstract:
A fixing arrangement comprises a retaining element and a clamping sleeve which receives a bone screw. The bone screw has a head and a secondary thread and is pivotally mounted in the clamping sleeve. The clamping sleeve has a radially protruding section on the outer casing of the clamping sleeve and at least one track of a clamping thread, which complements the secondary thread, in the interior of the clamping sleeve. In the unclamped state, a free path is formed by a clearance on the clamping sleeve. A protruding section engages into an opening on the receiving seat in a formfitting manner, and the thickened section is shaped to expand towards the rear in the form of a cone. The cone angle is selected such that the free path divided by the tangent of the half-cone angle corresponds to 0.5 to 2.5 times the thread pitch of the secondary thread.
Public/Granted literature
- US20150230845A1 ANTI-OVER TIGHTENING BONE SCREW FIXING ARRANGEMENT Public/Granted day:2015-08-20
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