Rotary drive cutter for dentistry
US9066773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2008 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | May 21, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental rotary drive cutting tool, which can limit breaking location to the shank side, and increase life span until breakage, is provided. A peeso reamer (10) as the dental rotary drive cutting tool according to the present invention includes a cutting portion (11) formed on the tip side, a shank (12) formed in a base, and a neck part (13) formed between the cutting portion (11) and the shank (12), wherein the neck part (13) includes a tapered portion (13a), which is wider on the tip side and narrower on the base side, and a straight portion (13b), which has a constant thickness with the same diameter as that of the end of the tapered portion on the base side. While it breaks at the narrowest portion of the tapered portion, this portion is a straight portion, and thus increase in life span is possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.