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Bone screw
专利权人:
发明人:
Steve Courtney,David Freehill
申请号:
US13691975
公开号:
US09763718B2
申请日:
2012.12.03
申请国别(地区):
US
年份:
2017
代理人:
摘要:
A bone screw is disclosed. A head includes a driver-receiving element formed thereon. A shank having a proximal portion, which is integrally connected to the head, and a distal portion maintains a constant diameter from the proximal portion to the distal portion. Three helical threads extend around the shank from the proximal portion to the distal portion. The three helical threads are symmetrically and helically aligned and advance uniformly along the length of the shank for each revolution to define a thread depth that remains constant along the length of the shank. The three helical threads respectively include three leads, which are offset by approximately 120° from each another. A tip is integrally connected to the distal portion of the shank and the tip intersects with a flute to define a self-tapping point.
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