US3294186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bits and methods of making the same
Assignee: TARTAN IND Inc
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Filing: 1964-06-22
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Granted: 1966-12-27
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A ROCK BIT COMPRISING AN ELONGATED GENERALLY CYLINDRICAL STEEL BODY, HAVING AT ONE END AN INTERNALLY THREADED OPENING ADAPTED TO RECEIVE A DRILL STEM, A PLURAILITY OF RADIALLY EXTENDING WINGS AT THE OTHER END OF SAID BODY, A SLOT IN EACH WING EXTENDING FROM A POINT ADJACENT THE AXIS OF THE BODY TO THE END OF THE WING, A CEMENTED CARBIDE TIP IN EACH SUCH SLOT EXTENDING OVER THE LENGTH THEREOF AND SPACED FROM THE SIDES OF SAID SLOT, A METAL SHIM IN SAID SLOT BETWEEN EACH SIDE OF SAID SLOT AND THE CARBIDE INSERT AND SPACED FROM EACH AND A BRAZE ALLOY LAYER ON EACH SIDE OF SAID SHIM, AND BRAZE ALLOY LAYERS BEING FUSED TO OPPOSITE SIDES OF THE SHIM AND TO THE CARBIDE INSERT AND THE SIDEWALL OF THE SLOT.
Claim 2
Dependent Claim
133 words
A ROCK BIT COMPRISING AN ELONGATED GENERALLY CYLINDRICAL STEEL BODY, HAVING AT ONE END AN INTERNALLY THREADED OPENING ADAPTED TO RECEIVE A DRILL STEM, A PLURAILITY OF RADIALLY EXTENDING WINGS AT THE OTHER END OF SAID BODY, A SLOT IN EACH WING EXTENDING FROM A POINT ADJACENT THE AXIS OF THE BODY TO THE END OF THE WING, A CEMENTED CARBIDE TIP IN EACH SUCH SLOT EXTENDING OVER THE LENGTH THEREOF AND SPACED FROM THE SIDES OF SAID SLOT, A METAL SHIM IN SAID SLOT BETWEEN EACH SIDE OF SAID SLOT AND THE CARBIDE INSERT AND SPACED FROM EACH AND A BRAZE ALLOY LAYER ON EACH SIDE OF SAID SHIM, AND BRAZE ALLOY LAYERS BEING FUSED TO OPPOSITE SIDES OF THE SHIM AND TO THE CARBIDE INSERT AND THE SIDEWALL OF THE SLOT.
References Cited (Backward Citations)
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Cited
US2673716A
Cited
US2976944A
Cited
US2973047A
Cited
US3190380A
Cited
US3191700A
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |