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Anti-over tightening bone screw fixing arrangement
专利权人:
Facet-Link Inc.
发明人:
Jensen, Harm-Iven
申请号:
AU2013329733
公开号:
AU2013329733A1
申请日:
2013.09.20
申请国别(地区):
AU
年份:
2015
代理人:
摘要:
A fixing arrangement comprises a retaining element (2) and a clamping sleeve (3) which receives a bone screw (1). The bone screw has a head (13) and a secondary thread (12) and is pivotally mounted in the clamping sleeve. The clamping sleeve has a radially protruding section (34) on the outer casing (30) of the clamping sleeve and at least one track of a clamping thread (32), which complements the secondary thread, in the interior (31) of the clamping sleeve. In the unclamped state, a free path is formed by a clearance on the clamping sleeve. A protruding section (34) is provided which engages into an opening (24) on the receiving seat (23) in a formfitting manner, and the thickened section (15) is shaped so as to expand towards the rear in the form of a cone. The cone angle (3) is selected such that the free path divided by the tangent of the half-cone angle (tan ß/2) corresponds to 0.5 to 2.5 times the thread pitch (h) of the secondary thread. By means of the cone angle selected in this manner, the clearance disappears after tightening by a specified tightening angle.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/
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