US3137354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit nozzles
Assignee: Reed Roller Bit Co
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Filing: 1960-01-11
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Granted: 1964-06-16
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Expires: 1980-01-11
Abstract
No abstract record available.
Inventors
- 👤 Augustus W Crawford
- 👤 Elvin G Boice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:18
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
IN A ROTARY DRILL BIT, A BIT HEAD HAVING ROLLER CUTTERS MOUNTED THEREON AND A DOWNWARDLY DIRECTED DRILLING FLUID PASSAGEWAY, A WEAR-RESISTANT NOZZLE IN THE LOWER END OF SAID PASSAGEWAY, THE SAID NOZZLE HAVING A SUBSTANTIALLY CYLINDRICAL OUTSIDE DIAMETER AND A BORE THERETHROUGH, THE AXIS OF THE SAID BORE BEING AT AN ANGLE WITH RESPECT TO THE CYLINDRICAL AXIS OF THE SAID NOZZLE, AN ANNULAR SEAL BETWEEN THE NOZZLE AND THE WALL OF THE SAID PASSAGEWAY, THE EXTERIOR OF THE SAID NOZZLE BEING PROVIDED WITH A PLURALITY OF CIRCUMFERENTIALLY DISPOSED SEATING DEPRESSIONS, THE SAID HEAD HAVING A THREADED BORE EXTENDING RADIALLY FROM THE SAID PASSAGEWAY TO THE EXTERIOR OF THE HEAD, A SET SCREW IN THE SAID THREADED BORE, THE INNER END OF THE SAID SET SCREW ADAPTED TO SEAT IN THE SAID DEPRESSIONS TO RETAIN THE SAID NOZZLE WITHIN THE BIT HEAD IN A PREDETERMINED AXIAL AND ANGULAR POSITION.
References Cited (Backward Citations)
US1784476A
Cited
US2055144A
Cited
US2192693A
Cited
US2710741A
Cited
US2758653A
Cited
US2885186A
Cited
US2868512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |