Endodontic irrigating instrument
US4608017A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1984 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | May 16, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endodontic irrigating instrument comprises a handpiece having an internal liquid passage therethrough extending from a liquid inlet formed in the proximal end of the handpiece to a liquid ejection nozzle provided at the distal end. The handpiece incorporates a suction or vacuum pump of the airjet or ejector type which comprises an air nozzle connected by a passage with an air inlet formed also in the proximal end of the handpiece. The vacuum chamber of the suction pump is connected by a separate internal passage in the handpiece with an aspiration needle provided adjacent to the liquid ejection nozzle. The proximal end of the handpiece is designed to be fitted with a coupling joint attached to a multiple-channel flexible hose which is conventionally used to supply compressed air and pressurized water from a dental unit to conventional air-driven dental turbine tools. Thus, the endodontic irrigating instrument can be used interchangeably with existing turbine tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.