Bone screw
US5180382A · kind A · utility
130Cited by
11References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Dec 17, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/863
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone screw (1) has a screw head (2), a screw tip (11), and a shaft (5) with a thread (8,14). The threaded segment (6,7) of the shaft (5) has a head-end, essentially cylindrical first shaft section (6) with minor diameter d.sub.1 (16), and a tip-end second shaft segment (7) that is connected with the first shaft segment (6) and which has a smaller minor diameter d.sub.2 (17). The thread (8,14) in the two shaft segments (6,7) has the same pitch (10,12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.