Drill head assembly for cranial perforators
US5007911A · kind A · utility
52Cited by
5References
24Claims
0Family size
Inventor
Key dates
| Filing date | Oct 18, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Oct 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/906
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drill head assembly for drilling holes in bony structure is disclosed. The assembly has an inner drill and an outer drill which rotate together as a unit. The leading portions of the outer drill are contiguous with the peripheral portions of the inner drill, and the inner and outer drills are adapted to form a bore-countersink opening in the bone, whereby the drill head assembly may be used to safely drill through relatively thin bone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.