Dental handpiece
US4212641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1977 |
| Grant date | Jul 15, 1980 |
| Priority date | — |
| Expiry date | Sep 28, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/185
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental handpiece comprising a holding sleeve, a head sleeve inclined to the holding sleeve and adapted to mount a dental instrument, a connecting zone providing an interconnection between the holding sleeve and the head sleeve, a drive shaft housed mainly within the holding sleeve and a driven shaft housed within the head sleeve, and a ball-type planetary transmission housed within the connecting zone and serving to transmit drive between the drive shaft and the driven shaft. The drive shaft is sub-divided into a first shaft portion which is housed in the holding sleeve, and a second shaft portion which is housed within the connecting zone and coupled with the planetary transmission. The second shaft portion extends coaxially with the driven shaft in the head sleeve, and the first and second drive shaft portions are coupled together by a rotary-drive-transmitting coupling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.