US3244459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure lubricated drill bit bearing
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1963-07-01
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Granted: 1966-04-05
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 John E Ortloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:14
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/24; E21B10/246
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A BIT FOR DRILLING BOREHOLES IN THE EARTH WHICH COMPRISES: A SHANK MEANS; A LEG MEMBER EXTENDING FROM SAID SHANK MEANS, THE LOWER PORTION OF SAID LEG MEMBER FORMING A JOURNAL; A ROLLER CONE MEMBER, A PORTION OF SAID ROLLER CONE MEMBER SHAPED TO DEFINE A BEARING MEANS MATING WITH THE JOURNAL OF SAID LEG MEMBER, SAID BEARING MEANS AND SAID JOURNAL HAVING A SUFFICIENT CLEARANCE THEREBETWEEN TO PERMIT THE CIRCULATION OF A LUBRICATING FLUID; MEANS TO ROTATABLY SUPPORT SAID ROLLER CONE MEMBER FROM SAID LEG MEMBER; SEALING MEANS FOR PREVENTING THE ESCAPE OF LUBRICATING FLUID FROM BETWEEN SAID JOURNAL AND SAID BEARING; PUMP MEANS WITHIN SAID LEG MEMBER HAVING AN INPUT AND AN OUTPUT; MEANS TO CONNECT THE OUTPUT OF SAID PUMP MEANS WITH ONE PORTION OF THE CLEARANCE BETWEEN THE JOURNAL AND THE BEARING; MEANS TO CONNECT THE INPUT TO SAID PUMP MEANS TO ANOTHER PORTION OF SUCH CLEARANCE; MEANS FOR DRIVING SAID PUMP MEANS FROM THE RELATIVE MOVEMENT BETWEEN SAID LEG MEMBER AND SAID ROLLER CONE MEMBER.
Claim 2
Dependent Claim
170 words
A BIT FOR DRILLING BOREHOLES IN THE EARTH WHICH COMPRISES: A SHANK MEANS; A LEG MEMBER EXTENDING FROM SAID SHANK MEANS, THE LOWER PORTION OF SAID LEG MEMBER FORMING A JOURNAL; A ROLLER CONE MEMBER, A PORTION OF SAID ROLLER CONE MEMBER SHAPED TO DEFINE A BEARING MEANS MATING WITH THE JOURNAL OF SAID LEG MEMBER, SAID BEARING MEANS AND SAID JOURNAL HAVING A SUFFICIENT CLEARANCE THEREBETWEEN TO PERMIT THE CIRCULATION OF A LUBRICATING FLUID; MEANS TO ROTATABLY SUPPORT SAID ROLLER CONE MEMBER FROM SAID LEG MEMBER; SEALING MEANS FOR PREVENTING THE ESCAPE OF LUBRICATING FLUID FROM BETWEEN SAID JOURNAL AND SAID BEARING; PUMP MEANS WITHIN SAID LEG MEMBER HAVING AN INPUT AND AN OUTPUT; MEANS TO CONNECT THE OUTPUT OF SAID PUMP MEANS WITH ONE PORTION OF THE CLEARANCE BETWEEN THE JOURNAL AND THE BEARING; MEANS TO CONNECT THE INPUT TO SAID PUMP MEANS TO ANOTHER PORTION OF SUCH CLEARANCE; MEANS FOR DRIVING SAID PUMP MEANS FROM THE RELATIVE MOVEMENT BETWEEN SAID LEG MEMBER AND SAID ROLLER CONE MEMBER.
References Cited (Backward Citations)
US1635592A
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US1838067A
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US1909128A
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US2174102A
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |