Bone screw with improved threads
US5492442A · kind A · utility
114Cited by
29References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1994 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/863
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone screw having a helical thread with a constant outside diameter and curling around a tapered core. The fine screw tip and thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the bone. The thicker core just below the screw head increases the screw's ability to withstand compressive and distractive loads. The core is thickest just below the head because it is at that point on the screw that the fulcrum loads are greatest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.