Dental handpiece
US4321039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jul 9, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/052
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental handpiece comprising a drive section with a drive shaft for driving a tool receiving socket mounted for rotation in an end of a handle section which handle section is coupled for relative rotation on the drive section, said dental handpiece having at least one cooling medium line being formed by a line segment arranged in each of said sections for conveying the medium to a nozzle adjacent the socket, and a rotatable coupling for the cooling medium lines characterized by the rotatable coupling being formed by a first and second sleeves being telescopically assembled together for relative rotation, one of said sleeves having an annular groove for each of the cooling medium lines and the other of the two sleeves having a radial opening in communication with each of the annular channels, said sleeves being detachably connected to the respective section to rotate therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.