Air-abrading tool
US5941702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Feb 3, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C3/025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A handpiece for a dental instrument includes a solid body having internally reamed passageways through which a fluid is carried. The handpiece may be a dental air-abrading tool for etching hard surfaces to enhance bond strength of adhesives, which includes a solid body having internally reamed passageways through which a gaseous fluid and an abrasive material are carried. A connector is mounted on one end of the body for connecting one of the body's internal passageways to a supply of gaseous fluid and a nozzle is mounted on the other end of the body for directing the gaseous fluid to a surface. A supply of an abrasive material is coupled to another internal passageways of the body. The nozzle includes an internal mixing chamber for mixing the gaseous fluid and abrasive material entering therein from the body's internal passageways. A switch is mounted on the body for activating the flow of gaseous fluid and abrasive material through the body. The switch includes a valve which is slidably mounted within a gaseous fluid passageway between a first position and a second position such that in its first position the valve blocks the flow of gaseous fluid and in its second position the v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.