US3140749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge inserts for drill bit
Assignee: Individual
•
Filing: 1959-12-03
•
Granted: 1964-07-14
•
Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Dionisotti Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A ROCK DRILLING TOOL COMPRISING A HEAD, HAVING A PAIR OF GROOVES THEREIN, SAID GROOVES HAVING A PAIR OF CONVERGING SIDES AND AN INCLINED BASE, A DETACHABLE INSERT DISPOSED IN EACH OF SAID GROOVES, SAID INSERTS HAVING A CUTTING EDGE, A REAR FACE, A FRONT FACE, A PAIR OF SIDES CONVERGING FROM SAID REAR FACE TO SAID FRONT FACE AND A FLAT BASE INCLINED LONGITUDINALLY FROM SAID FRONT FACE TO SAID REAR FACE, SAID INSERTS DISPOSED IN SAID GROOVES WITH THEIR LONGITUDINAL AXES PARALLEL TO EACH OTHER AND THE FRONT FACE OF ONE OF SAID INSERTS DISPOSED IN A DIRECTION OPPOSITE TO THE FRONT FACE OF THE OTHER OF INSERTS, ALL OF SAID SIDES AND BASES CONVERGING IN A DIRECTION SO THAT FOLLOWING INSTALLATION OF SAID INSERTS IN SAID GROOVES THE PRESSURE EXERTED ON THE INSERTS DURING OPERATION OF THE TOOL CAUSES SAID INSERTS TO BE WEDGED FIRMLY IN SAID
Claim 2
Dependent Claim
150 words
A ROCK DRILLING TOOL COMPRISING A HEAD, HAVING A PAIR OF GROOVES THEREIN, SAID GROOVES HAVING A PAIR OF CONVERGING SIDES AND AN INCLINED BASE, A DETACHABLE INSERT DISPOSED IN EACH OF SAID GROOVES, SAID INSERTS HAVING A CUTTING EDGE, A REAR FACE, A FRONT FACE, A PAIR OF SIDES CONVERGING FROM SAID REAR FACE TO SAID FRONT FACE AND A FLAT BASE INCLINED LONGITUDINALLY FROM SAID FRONT FACE TO SAID REAR FACE, SAID INSERTS DISPOSED IN SAID GROOVES WITH THEIR LONGITUDINAL AXES PARALLEL TO EACH OTHER AND THE FRONT FACE OF ONE OF SAID INSERTS DISPOSED IN A DIRECTION OPPOSITE TO THE FRONT FACE OF THE OTHER OF INSERTS, ALL OF SAID SIDES AND BASES CONVERGING IN A DIRECTION SO THAT FOLLOWING INSTALLATION OF SAID INSERTS IN SAID GROOVES THE PRESSURE EXERTED ON THE INSERTS DURING OPERATION OF THE TOOL CAUSES SAID INSERTS TO BE WEDGED FIRMLY IN SAID
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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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |