US3174564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination core bit
Assignee: Hughes Tool Co
•
Filing: 1963-06-10
•
Granted: 1965-03-23
•
Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Erwin A Morlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:56
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18; E21B10/02; E21B10/06; E21B10/10; E21B10/14; E21B10/46; E21B10/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A COMBINATION CORE BIT COMPRISING A HEAD HAVING AN AXIAL BORE, A DIAMOND CROWN IN THE FORM OF A CYLINDRICAL SHELL INTEGRAL AND COAXIAL WITH SAID HEAD AND DEPENDING THEREFROM, THE LOWER ANNULAR SURFACE OF SAID CROWN HAVING A MULTIPLICITY OF DIAMONDS EMBEDDED THEREIN AND A MULTIPLICITY OF CUTTER ASSEMBLIES INTEGRALLY ATTACHED TO SAID HEAD AND DEPENDENT THEREFROM AT ITS PERIPHERY, EACH SAID CUTTER ASSEMBLY INCLUDING A LEG SECURED TO SAID HEAD, A BEARING PIN INTEGRAL WITH SAID LEG AND EXTENDING DOWNWARDLY AND INWARDLY TOWARD SAID AXIAL BORE AND THE OUTER SURFACE OF SAID CROWN, AND A ROLLING CONE CUTTER ROTATABLY MOUNTED ON SAID BEARING PIN AND HAVING ITS APEX END TRUNCATED AND DISPOSED WITHIN ONE OF SAID RECESSES.
Claim 2
Dependent Claim
119 words
A COMBINATION CORE BIT COMPRISING A HEAD HAVING AN AXIAL BORE, A DIAMOND CROWN IN THE FORM OF A CYLINDRICAL SHELL INTEGRAL AND COAXIAL WITH SAID HEAD AND DEPENDING THEREFROM, THE LOWER ANNULAR SURFACE OF SAID CROWN HAVING A MULTIPLICITY OF DIAMONDS EMBEDDED THEREIN AND A MULTIPLICITY OF CUTTER ASSEMBLIES INTEGRALLY ATTACHED TO SAID HEAD AND DEPENDENT THEREFROM AT ITS PERIPHERY, EACH SAID CUTTER ASSEMBLY INCLUDING A LEG SECURED TO SAID HEAD, A BEARING PIN INTEGRAL WITH SAID LEG AND EXTENDING DOWNWARDLY AND INWARDLY TOWARD SAID AXIAL BORE AND THE OUTER SURFACE OF SAID CROWN, AND A ROLLING CONE CUTTER ROTATABLY MOUNTED ON SAID BEARING PIN AND HAVING ITS APEX END TRUNCATED AND DISPOSED WITHIN ONE OF SAID RECESSES.
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |