Patent US2296317A successfully refreshed from Google Patents.
Patent US3146813A successfully refreshed from Google Patents.
US3146813A
Expired / Lapsed
US
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Boring tool
Assignee: Individual
•
Filing: 1962-08-31
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Granted: 1964-09-01
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Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Dirksen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:25
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/895; Y10T408/8957; Y10T408/905; Y10T408/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
172 words
IN A BORING TOOL, AN OPEN ENDED TUBE, A CLOSURE ELEMENT SECURED IN EACH END OF SAID TUBE, THERE BEING A HOLE IN EACH OF SAID CLOSURE ELEMENTS, A BEARING MEMBER SEATED IN EACH HOLE, A ROTATABLE SHAFT JOURNALED IN SAID BEARING MEMBERS AND HAVING A PORTION ADJACENT EACH END PROJECTING BEYOND THE ADJACENT CLOSURE ELEMENT, A COLLAR ON EACH END PORTION OF SAID SHAFT BEARING AGAINST THE ADJACENT BEARING MEMBER AND EACH BEING REMOVABLY SECURED TO SAID SHAFT, THE PORTION OF SAID SHAFT ADJACENT ONE END BEING PROVIDED WITH EXTERNAL THREADS AND WITH A BORE EXTENDING INWARDLY OF SAID SHAFT ONE END AND TERMINATING AT A POINT CONTIGUOUS TO THE ADJACENT BEARING MEMBER, A DRILL BIT HAVING THE PORTION ADJACENT ONE END SEATED IN SAID BORE, A TUBULAR SAW BLADE HAVING A HUB PROVIDED WITH INTERNAL THREADS DISPOSED WITH THE HUB THREADABLY ENGAGED ON SAID SHAFT THREADED PORTION AND BEARING AGAINST THE ADJACENT COLLAR, AND MEANS ON THE OTHER END PORTION OF SAID SHAFT FOR ATTACHMENT TO A ROTARY POWER SOURCE.
References Cited (Backward Citations)
CH30241A
Cited
US2721592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |