Single multi-function handpiece for dental instruments
US4820152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C17/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A single handpiece that can be used in multiple dental treatments is provided. The handpiece comprises a housing having a coil for producing an electromagnetic or electrostrictive field in the housing, and a number of inserts that react with the electromagnetic or electrostrictive field and can be used with the housing to complete the handpiece. A switching system used with the handpiece, which electrically recognizes the particular insert used with the housing provide for automatically controlling circuitry that determines which of a number of materials and medicaments are to be delivered to the handpiece for use with a particular insert. Circuitry which provides better control of the ultrasonic insert in the handpiece is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.