Drills for clearing obstructions in arteries
Abstract
Abstract A DRILL FOR CLEARING SMALL DIAMETER TUBES SUCH AS ARTERIES COMPRISES A ROTATABLE BIT SURROUNDED BY A NON-ROTATING SHIELD INTEGRAL WITH AN OUTER FLEXIBLE TUBE THE OTHER END OF WHICH IS GRIPPED IN A DRILL BODY. AN INNER FLEXIBLE TUBE LIES WITHIN THE OUTER TUBE ANE EXTENDS TO A POINT JUST SHORT OF THE BIT, ITS OTHER END ALSO BEING GRIPPED IN THE DRILL BODY. A FLEXIBLE SHAFT EXTENDS FROM THE BIT TO WHICH IT IS FIXED, THROUGH THE INNER TUBE AND A BEARING IN THE DRILL BODY FROM WHICH IT PROTRUDES TO A COUPLING MEMBER FIXED TO THE SHAFT. DUCTS IN THE DRILL BODY LEAD TO THE SPACE BETWEEN THE TUBES AND TO THE INTERIOR OF THE INNER TUBE ENABLING FLUSING LIQUID TO BE INTRODUCED TO AND WITHDRAWN FROM THE REGION OF THE BIT.
Inventors
- 👤 Edward Moss
Bibliographic Details
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |