专利名称：Fixation screw
发明人：Richard H. Clewett,Claude O. Pering,Daniel B.
励志书籍
Sharitz什么身什么骨
弱肉强食的世界搁组词申请号：US07/924315
申请日：19920803
公开号：US05334204A
公司管理层公开日：
19940802
专利内容由知识产权出版社提供
摘要：A fixation screw for attaching to a bone has at least one flute which travers the proximal portion of the thread to form rever cutting faces on the thread at the proximal portion. The cutting faces are arranged to cut the bone when the screw is rotated in a rever rotational direction to ea in withdrawal of the screw. The flute forms a first plane containing the cutting faces on the thread and the axis of rotation of the screw. A ba surface is formed by the flute forwardly of the cutting faces when the screw is rotated in a rever direction. The ba surface includes a rotational portion at the root diameter of the thread and a planar portion in a plane tangential to the rotational portion and arranged so that a substantial portion of the cutting face is axially offt from the leading thread to thereby engage the bone. Additionally or optionally, the thread is tapered at the proximal end to form a rever lf-tapping thread.
申请人：ACE MEDICAL COMPANY
代理机构：Kinney & Lange情哥哥是什么意思
银行存款证明春椿更多信息请下载全文后查看
