Water-cooled dental cutting member and handpiece for use therewith
Abstract
Abstract A WATER-COOLED DENTAL CUTTING MEMBER THAT MAY BE USED FOR CUTTING, GRINDING, OR DRILLING, DEPENDING UPON THE CONFIGURATION OF THE TOOTH-CONTACTING PORTION THEREOF, AND A TURBINE-TYPE DENTAL HANDPIECE THAT IS PARTICULARLY ADAPTED FOR REMOVABLY SUPPORTING THE CUTTING MEMBER, AS WELL AS SUPPLYING A CONSTANT FLOW OF COOLING WATER THERETO. THE TURBINE ROTOR IN THE HANDPIECE OPERATES WITHIN A CONFINED SPACE THAT IS AT A SUBSTANTIALLY HIGHER AIR PRESSURE THAN THE PRESSURE OF THE COOLING WATER. ACCORDDINGLY, COOLING WATER HAS NO TENDENCY TO ENTER THAT PORTION OF THE HANDPIECE IN WHICH THE ROTOR IS SUPPORTED TO SLOW DOWN THE RATE OF ROTATION OF THE ROTOR OR STOP THE ROTOR BY FRICTIONAL CONTACT THEREWITH.
Inventors
- 👤 James B Barsby
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |