Dental handpiece with fluid delivery control
US4266934A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1979 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Sep 7, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/052
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This dental handpiece comprises means for controlling the delivery of compressed air and water to an outlet conduit leading to the head of the handpiece. The water and air supply conduits from the motor open each into a circular groove formed in the inner periphery of a socket easily fitted on the tool holder retaining end of the motor. Radial ports formed in the socket open on the one hand into the grooves, respectively, and on the other hand into an annular chamber formed between the socket and the handpiece body, the outlet conduit extending from this chamber. A rotary ring accessible from outside the handpiece body is provided with a pair of seals off-set axially and angularly to each other and so arranged that in two end positions of the ring one of the two supply conduits is closed while the other conduit is open, and that in an intermediate position both conduits are open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.