US3125174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
figure
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:28
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/23; E21B21/00; E21B21/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A ROLLING CUTTER ROCK BIT SUITABLE FOR USE WITH GASEOUS FLUSHING MEDIA COMPRISING A HEAD SECTION WITH AN UPWARDLY EXTENDING SHANK SUITABLE FOR CONNECTION TO A DRILL STRING, SAID HEAD AND SHANK HAVING AN AXIALLY EXTENDING AND COEXTENSIVE CENTRAL PASSAGEWAY THERETHROUGH, AT LEAST ONE LEG EXTENDING DOWNWARDLY FROM SAID HEAD, A BEARING PIN THEREON EXTENDING GENERALLY INWARDLY BENEATH SAID PASSAGEWAY, A ROLLING CUTTER ROTATABLY MOUNTED ON SAID BEARING PIN TO DEFINE THEREWITH A BEARING GAP, PASSAGE MEANS IN SAID HEAD, LEG AND BEARING PIN EXTENDING FROM SAID BEARING GAP TO A BEARING PORT IN SAID CENTRAL PASSAGEWAY, AND A MEMBER EXTENDING GENERALLY TRANSVERSE SAID PASSAGEWAY UPSTREAM FROM THE EXIT END THEREOF, SAID MEMBER HAVING AT LEAST ONE RESTRICTED ORIFICE THERETHROUGH AND BEING SUPPORTED FROM THE WALL OF SAID PASSAGEWAY TO DIVIDE THE PASSAGEWAY INTO A HIGH PRESSURE ZONE AND A LOW PRESSURE ZONE, SAID LOW PRESSURE ZONE LYING DOWNSTREAM FROM SAID MEMBER AND ABOVE THE EXIT END OF THE PASSAGEWAY, SAID MEMBER BEING SECURED TO SAID WALL AGAINST AT LEAST DOWNWARD MOVEMENT WITH RESPECT THERETO AND TO
Claim 2
Dependent Claim
177 words
A ROLLING CUTTER ROCK BIT SUITABLE FOR USE WITH GASEOUS FLUSHING MEDIA COMPRISING A HEAD SECTION WITH AN UPWARDLY EXTENDING SHANK SUITABLE FOR CONNECTION TO A DRILL STRING, SAID HEAD AND SHANK HAVING AN AXIALLY EXTENDING AND COEXTENSIVE CENTRAL PASSAGEWAY THERETHROUGH, AT LEAST ONE LEG EXTENDING DOWNWARDLY FROM SAID HEAD, A BEARING PIN THEREON EXTENDING GENERALLY INWARDLY BENEATH SAID PASSAGEWAY, A ROLLING CUTTER ROTATABLY MOUNTED ON SAID BEARING PIN TO DEFINE THEREWITH A BEARING GAP, PASSAGE MEANS IN SAID HEAD, LEG AND BEARING PIN EXTENDING FROM SAID BEARING GAP TO A BEARING PORT IN SAID CENTRAL PASSAGEWAY, AND A MEMBER EXTENDING GENERALLY TRANSVERSE SAID PASSAGEWAY UPSTREAM FROM THE EXIT END THEREOF, SAID MEMBER HAVING AT LEAST ONE RESTRICTED ORIFICE THERETHROUGH AND BEING SUPPORTED FROM THE WALL OF SAID PASSAGEWAY TO DIVIDE THE PASSAGEWAY INTO A HIGH PRESSURE ZONE AND A LOW PRESSURE ZONE, SAID LOW PRESSURE ZONE LYING DOWNSTREAM FROM SAID MEMBER AND ABOVE THE EXIT END OF THE PASSAGEWAY, SAID MEMBER BEING SECURED TO SAID WALL AGAINST AT LEAST DOWNWARD MOVEMENT WITH RESPECT THERETO AND TO
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) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |