Pressure-responsive speed control for dental handpieces
US4074434A · kind A · utility
2Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Feb 12, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/0038
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A speed control system for dental handpieces in which a sleeve or tube of pliable material defines an elongated deformable passage. The passage communicates at one end with a source of gas (air) under pressure and, at its opposite end, is vented to discharge a continuous stream of gas whenever the unit is in operation. When the resilient sleeve is squeezed anywhere along its length, back pressure is created which acts upon a pressure-responsive pilot valve, the pilot valve in turn regulating the speed of the dental handpiece in accordance with the amount of back pressure developed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.