US3326307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bit roller cone
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1965-01-28
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Granted: 1967-06-20
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Expires: 1985-01-28
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/50; E21B10/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A ROCK BIT, A ROLLER CONE CUTTER COMPRISING A CONED BODY HAVING A PLURALITY OF STEPS FORMED IN ITS SURFACE AND EXTENDING AROUND ITS PERIPHERY IN PARALLEL SPACED RELATION TO EACH OTHER AND IN CONCENTRIC RELATION TO THE AXIS OF THE BODY, AND A SEPARATE ANNULAR BAND SEATED FAST IN EACH STEP HAVING A SUCCESSION OF CUTTER TEETH AROUND THE BAND PROJECTING FROM ITS PERIPHERAL SURFACE, EACH BAND HAVING AN INNER DIAMETER WALL CO-EXTENSIVE WITH AND LYING FLUSH UPON ONE WALL OF THE RELATED STEP AND HAVING AN ADJACENT WALL CO-EXTENSIVE WITH AND LYING FLUSH UPON A SECOND WALL OF THE STEP SO THAT NO PORTIONS OF SAID INNER DIAMETER AND ADJACENT WALLS PROJECT BEYOND THE SURFACE OF THE BODY TO PERMIT OUTWARDLY DIRECTRED THRUSTS TO BE MADE AGAINST THEM DURING DRILLING OPERATIONS.
Claim 2
Dependent Claim
134 words
IN A ROCK BIT, A ROLLER CONE CUTTER COMPRISING A CONED BODY HAVING A PLURALITY OF STEPS FORMED IN ITS SURFACE AND EXTENDING AROUND ITS PERIPHERY IN PARALLEL SPACED RELATION TO EACH OTHER AND IN CONCENTRIC RELATION TO THE AXIS OF THE BODY, AND A SEPARATE ANNULAR BAND SEATED FAST IN EACH STEP HAVING A SUCCESSION OF CUTTER TEETH AROUND THE BAND PROJECTING FROM ITS PERIPHERAL SURFACE, EACH BAND HAVING AN INNER DIAMETER WALL CO-EXTENSIVE WITH AND LYING FLUSH UPON ONE WALL OF THE RELATED STEP AND HAVING AN ADJACENT WALL CO-EXTENSIVE WITH AND LYING FLUSH UPON A SECOND WALL OF THE STEP SO THAT NO PORTIONS OF SAID INNER DIAMETER AND ADJACENT WALLS PROJECT BEYOND THE SURFACE OF THE BODY TO PERMIT OUTWARDLY DIRECTRED THRUSTS TO BE MADE AGAINST THEM DURING DRILLING OPERATIONS.
References Cited (Backward Citations)
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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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |