Dental handpiece
US4354839A · kind A · utility
Inventor
Key dates
| Filing date | Dec 1, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Dec 1, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental handpiece which has a drive transmission for transmitting the rotation from a motor to a socket receiving a tool for rotation in the head of the handpiece and having at least one cooling agent line formed in sections with two of the sections being connected to one another by a rotatable connection characterized by a first drive shaft having a direct coupling with the drive shaft of the drive part at one end and having two coaxially arranged gears of different number of teeth disposed on the other end, a first sleeve supporting the first drive shaft and having each cooling line section terminating in an annular groove forming part of the rotatable connection, a second sleeve telescopically received on the first sleeve and having each cooling line section starting with a radially extending port for communicating with an annular groove, a first releasable connection between the first sleeve and the housing of the drive part which does not allow any rotation therebetween, a second releasable connection between the first sleeve and second allowing rotational movement without axial displacement, a grip part formed by the first, second sleeves and an outer sleeve covering which r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.