Patent US3193028A successfully refreshed from Google Patents.
US3193028A
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Rotary drill bit
Assignee: ExxonMobil Upstream Research Co
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Filing: 1962-09-26
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Granted: 1965-07-06
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Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 Radzimovsky Eugene Ivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:02
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/24; E21B10/246; F; F16; F16C; F16C19/00; F16C19/54; F16C19/546; F16C19/547; F16C25/00; F16C25/06; F16C2352/00; F16C35/00; F16C35/04; F16C35/06; F16C35/07; F16C35/077
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A ROTARY DRILL BIT WHEREIN A CONICAL CUTTING ELEMENT COMTAINING AN INTERNAL RECESS IS ROTATABLY MOUNTED ON A CANTILEVER PIN EXTENDING INTO SAID RECESS, THE IMPROVEMENT WHICH COMPRISES: A REAR BALL BEARING MOUNTED IN SAID RECESS TO TAKE AXIAL AND RADIAL LOADS APPLIED TO SAID CUTTING ELEMENT, SAID REAR BEARING INCLUDING AN ANGULAR INNER SPACE MOUNTED ON SAID PIN IN CONTACT WITH A SHOULDER NEAR THE FIXED END THEREOF, AN ANGULAR OUTER RACE MOUNTED IN SAID RECESS IN CONTACT WITH AN INTERNAL SHOULDER THEREIN AND A PLURALITY OF BALLS POSITIONED BETWEEN SAID INNER AND OUTER RACES, A FRONT BALL BEARING MOUNTED IN SAID RECESS TO TAKE AXIAL AND RADIAL LOADS APPLIED TO SAID CUTTING ELEMENT, SAID FRONT BEARING INCLUDING AN ANGULAR INNER RACE MOUNTED ON SAID PIN NEAR THE FREE END THEREOF, AN ANGULAR
Claim 2
Dependent Claim
135 words
IN A ROTARY DRILL BIT WHEREIN A CONICAL CUTTING ELEMENT COMTAINING AN INTERNAL RECESS IS ROTATABLY MOUNTED ON A CANTILEVER PIN EXTENDING INTO SAID RECESS, THE IMPROVEMENT WHICH COMPRISES: A REAR BALL BEARING MOUNTED IN SAID RECESS TO TAKE AXIAL AND RADIAL LOADS APPLIED TO SAID CUTTING ELEMENT, SAID REAR BEARING INCLUDING AN ANGULAR INNER SPACE MOUNTED ON SAID PIN IN CONTACT WITH A SHOULDER NEAR THE FIXED END THEREOF, AN ANGULAR OUTER RACE MOUNTED IN SAID RECESS IN CONTACT WITH AN INTERNAL SHOULDER THEREIN AND A PLURALITY OF BALLS POSITIONED BETWEEN SAID INNER AND OUTER RACES, A FRONT BALL BEARING MOUNTED IN SAID RECESS TO TAKE AXIAL AND RADIAL LOADS APPLIED TO SAID CUTTING ELEMENT, SAID FRONT BEARING INCLUDING AN ANGULAR INNER RACE MOUNTED ON SAID PIN NEAR THE FREE END THEREOF, AN ANGULAR
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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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |