Dental instrument
US5893716A · kind A · utility
Inventors
Key dates
| Filing date | May 5, 1998 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | May 5, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental instrument includes an elongate handle having a structural axis, a drill bit mounted to the handle at a distal end thereof for rotation about a rotation axis different from and substantially parallel to the structural axis, and a drive operatively connected to the drill bit and disposed at least partially in the handle for rotating the drill bit about the rotation axis. The drill bit is part of a bit assembly detachably secured to the handle at the distal end thereof. Where the handle includes a nozzle at the distal end, the bit assembly including means for redirecting liquid from the nozzle approximately to a free end of the drill bit. This redirection component may include a deflector surface or, alternatively, a channel or passageway for repressurizing liquid from the nozzle. In the latter case, another nozzle is provided at the downstream end of the channel or passageway. In addition, it is contemplated that the bit assembly includes a mechanical power linkage releasably connected to the drive. The mechanical linkage may be permanently or removably connected to the drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.