Patent US3084673A successfully refreshed from Google Patents.
US3084673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Down-hole drill
Assignee: St. Joseph's Hospital and Medical Center
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Filing: 1962-04-16
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Granted: 1963-04-09
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Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 Howard V Sears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:39
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A DOWN-HOLE DRILL, COMPRISING A HOUSING ADAPTED FOR CONNECTION AT ONE END TO A SOURCE OF FLUID PRESSURE, AN ANNULAR HAMMER RECIPROCALLY MOUNTED WITHIN SAID HOUSING, VALVE MEANS ADJACENT SAID ONE END OF THE HOUSING, A BITSUPPORTING MEANS RECIPROCALLY MOUNTED AT THE OTHER END OF THE HOUSING, A TUBE SUPPORTED WITHIN SAID HOUSING AND EXTENDING THROUGH THE HAMMER BORE, THE TUBE HAVING ONE END IN PRESSURE FLUID TRANSMITTING COMMUNICATION WITH SAID BITSUPPORTING MEANS, PORT MEANS IN SAID VALVE FOR DIRECTING PRESSURE FLUID ALTERNATELY TO ONE END OF THE HAMMER AND INTO THE OTHER END OF SAID TUBE, HAMMER CONTROLLED PORT MEANS ADJACENT SAID ONE END OF THE TUBE FOR DIRECTING PRESSURE FLUID TO THE OTHER END OF THE HAMMER AND FURTHER VALVE MEANS FOR SELECTIVELY DIRECTING PRESSURE FLUID FROM SAID TUBE TO SAID BIT-SUPPORTING MEANS.
Claim 2
Dependent Claim
135 words
A DOWN-HOLE DRILL, COMPRISING A HOUSING ADAPTED FOR CONNECTION AT ONE END TO A SOURCE OF FLUID PRESSURE, AN ANNULAR HAMMER RECIPROCALLY MOUNTED WITHIN SAID HOUSING, VALVE MEANS ADJACENT SAID ONE END OF THE HOUSING, A BITSUPPORTING MEANS RECIPROCALLY MOUNTED AT THE OTHER END OF THE HOUSING, A TUBE SUPPORTED WITHIN SAID HOUSING AND EXTENDING THROUGH THE HAMMER BORE, THE TUBE HAVING ONE END IN PRESSURE FLUID TRANSMITTING COMMUNICATION WITH SAID BITSUPPORTING MEANS, PORT MEANS IN SAID VALVE FOR DIRECTING PRESSURE FLUID ALTERNATELY TO ONE END OF THE HAMMER AND INTO THE OTHER END OF SAID TUBE, HAMMER CONTROLLED PORT MEANS ADJACENT SAID ONE END OF THE TUBE FOR DIRECTING PRESSURE FLUID TO THE OTHER END OF THE HAMMER AND FURTHER VALVE MEANS FOR SELECTIVELY DIRECTING PRESSURE FLUID FROM SAID TUBE TO SAID BIT-SUPPORTING MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |