Control for dental handpieces and the like
Abstract
Abstract A FINGER OPERATED MEANS FOR CONTROLLING THE SPEED OF AN AIR DRIVEN HANDPIECE, FLOW OF COOLING WATER, AND/OR VACUUM ASPIRATION WHEREIN BLEED AIR FROM THE POWER AIR LINE IS FED TO A PRESSURE OPERATED VALVE AND THEN EXHAUSTED THROUGH A NOZZLE TO ATMOSPHERE. PLACING A THUMB OR FINGER OVER THE EXHAUST NOZZLE CREATES A BACK PRESSURE TO OPERATE THE VALVES WHICH CONTROL THE SPEED OF THE HANDPIECE, FLOW OF COOLING WATER AND/OR VACUUM ASPIRATION. THE NOZZLE HAS A CONVEX SHAPE WHICH SEATS THE NOZZLE IN THE FLESH OF THE THUMB OR FINGER OVERCOMING THE TENDENCY OF THE FINGER TO SLIP OFF THE NOZZLE DUE TO THE LOW FRICTION CREATED BY AIR EXHAUSTING THROUGH THE NOZZLE AND AGAINST THE SURFACE OF THE FINGER. THIS CONTROL NOZZLE CAN BE MOUNTED IN ANY CONVENIENT LOCATION SUCH AS ON THE DENTAL HANDPIECE ITSELF OR ON A DENTAL MOUTH MIRROR.
Inventors
- 👤 James C Martin
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |