US3175293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental handpiece
Assignee: Individual
•
Filing: 1958-10-10
•
Granted: 1965-03-30
•
Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 John V Borden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/08; A61C1/14; A61C1/141; A61C1/18; A61C1/181; Y; Y10; Y10S; Y10S415/00; Y10S415/904; Y10T; Y10T279/00; Y10T279/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A DENTAL HANDPIECE COMPRISING A HANDLE PROVIDED WITH A CYLINDRICAL HEAD HAVING A CLOSED END, A FIRST MAGNET MOUNTED ON THE CLOSED END OF SAID HEAD, A FLUID DRIVEN ROTOR CARTRIDGE SECURED IN SAID HEAD, SAID CARTRIDGE COMPRISING A HOUSING, A MAGNETIZED TOOL RECEIVING ROTOR SHAFT ING SAID HOUSING, AND AXIALLY MOVABLY INTO AND OUT OF CONTACT WITH SAID FIRST MAGNET, A GAS INLET TUBE IN SAID HANDLE COMMUNICATING WITH THE INTERIOR OF SAID HOUSING TO DIRECT A JET OF GAS TANGENTIALLY TO DRIVE SAID ROTOR, SAID HOUSING HAVING PORTS POSITIONED THEREIN FOR DIRECTING AIR EXHAUSTED FROM SAID RATOR TOWARD THE CONTACT POINT BETWEEN SAID MAGNET AND SAID MAGNETIC SHAFT TO AXIALLY SHIFT SAID SHAFT WHEREBY SAID GASES BREAK SAID CONTACT.
Claim 2
Dependent Claim
121 words
A DENTAL HANDPIECE COMPRISING A HANDLE PROVIDED WITH A CYLINDRICAL HEAD HAVING A CLOSED END, A FIRST MAGNET MOUNTED ON THE CLOSED END OF SAID HEAD, A FLUID DRIVEN ROTOR CARTRIDGE SECURED IN SAID HEAD, SAID CARTRIDGE COMPRISING A HOUSING, A MAGNETIZED TOOL RECEIVING ROTOR SHAFT ING SAID HOUSING, AND AXIALLY MOVABLY INTO AND OUT OF CONTACT WITH SAID FIRST MAGNET, A GAS INLET TUBE IN SAID HANDLE COMMUNICATING WITH THE INTERIOR OF SAID HOUSING TO DIRECT A JET OF GAS TANGENTIALLY TO DRIVE SAID ROTOR, SAID HOUSING HAVING PORTS POSITIONED THEREIN FOR DIRECTING AIR EXHAUSTED FROM SAID RATOR TOWARD THE CONTACT POINT BETWEEN SAID MAGNET AND SAID MAGNETIC SHAFT TO AXIALLY SHIFT SAID SHAFT WHEREBY SAID GASES BREAK SAID CONTACT.
References Cited (Backward Citations)
US2090885A
Cited
US2334755A
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US2606366A
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US2605619A
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US2871562A
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US2945299A
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US2897596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |