US3141650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental hand piece
Assignee: Dentists Supply Company of New York
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Filing: 1963-05-13
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Granted: 1964-07-21
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Jacob A Saffir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:01
CPC Classifications
F; F01; F01D; F01D15/00; F01D15/06; F01D15/065; A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A DENTAL TURBINE COMPRISING A HOUSING, A ROTOR, A BEARING AT EACH END OF SAID ROTOR HOLDING SAID ROTOR AGAINST RADIAL MOVEMENT IN SAID HOUSING, SAID ROTOR HAVING A PORTION OF GREATEST DIAMETER BETWEEN SAID BEARINGS AND A GENERALLY CONICAL TAPERED WALL BETWEEN SAID PORTION OF GREATEST DIAMETER AND EACH SAID BEARING, SAID ROTOR BEING PROVIDED WITH AN INTERNAL CAVITY, AND WITH A PLURALITY OF TANGENTIAL NOZZLES EXTENDING FROM SAID CAVITY TO SAID PORTION OF GREATEST DIAMETER, SAID HOUSING HAVING AN INTERIOR SHAPE GENERALLY COMPLEMENTARY TO THE SHAPE OF SAID ROTOR COMPRISING COAXIAL CONICAL PORTIONS SURROUNDING AND SPACED FROM THE CONICAL WALLS OF SAID ROTOR, AND HAVING AN ANNULAR ENLARGED EXHAUST PASSAGE SURROUNDING SAID PORTION OF GREATEST DIAMETER OPPOSITE SAID TANGENTIAL NOZZLES, ONE OF SAID BEARINGS BEING PROVIDED WITH AN AIR PASSAGE LEADING TO SAID INTERNAL CAVITY, MEANS TO PROVIDE AIR UNDER PRESSURE TO SAID AIR PASSAGE, AND MEANS TO ADJUST THE AIR PRESSURE BETWEEN THE CONICAL WALLS OF SAID ROTOR AND THE CONICAL WALLS OF SAID HOUSING ACCORDING TO THE AXIAL POSITION OF SAID ROTOR IN SAID HOUSING, WHEREBY SAID ROTOR IS BIASED BY AIR PRESSURE IN A DIRECTION CONTRARY TO ITS AXIAL MOVEMENT.
Claim 2
Dependent Claim
195 words
A DENTAL TURBINE COMPRISING A HOUSING, A ROTOR, A BEARING AT EACH END OF SAID ROTOR HOLDING SAID ROTOR AGAINST RADIAL MOVEMENT IN SAID HOUSING, SAID ROTOR HAVING A PORTION OF GREATEST DIAMETER BETWEEN SAID BEARINGS AND A GENERALLY CONICAL TAPERED WALL BETWEEN SAID PORTION OF GREATEST DIAMETER AND EACH SAID BEARING, SAID ROTOR BEING PROVIDED WITH AN INTERNAL CAVITY, AND WITH A PLURALITY OF TANGENTIAL NOZZLES EXTENDING FROM SAID CAVITY TO SAID PORTION OF GREATEST DIAMETER, SAID HOUSING HAVING AN INTERIOR SHAPE GENERALLY COMPLEMENTARY TO THE SHAPE OF SAID ROTOR COMPRISING COAXIAL CONICAL PORTIONS SURROUNDING AND SPACED FROM THE CONICAL WALLS OF SAID ROTOR, AND HAVING AN ANNULAR ENLARGED EXHAUST PASSAGE SURROUNDING SAID PORTION OF GREATEST DIAMETER OPPOSITE SAID TANGENTIAL NOZZLES, ONE OF SAID BEARINGS BEING PROVIDED WITH AN AIR PASSAGE LEADING TO SAID INTERNAL CAVITY, MEANS TO PROVIDE AIR UNDER PRESSURE TO SAID AIR PASSAGE, AND MEANS TO ADJUST THE AIR PRESSURE BETWEEN THE CONICAL WALLS OF SAID ROTOR AND THE CONICAL WALLS OF SAID HOUSING ACCORDING TO THE AXIAL POSITION OF SAID ROTOR IN SAID HOUSING, WHEREBY SAID ROTOR IS BIASED BY AIR PRESSURE IN A DIRECTION CONTRARY TO ITS AXIAL MOVEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |