Patent US3145787A successfully refreshed from Google Patents.
US3145787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary and input drilling apparatus
Assignee: Jersey Production Research Co
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Filing: 1961-12-21
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Granted: 1964-08-25
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robinson W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:48
CPC Classifications
E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN APPARTUS FOR DRILLING A BOREHOLE IN THE EARTH INCLUDING A DRILL STRING AND COMPRISING AN OUTER CASE ASSEMBLY ADAPTED TO BE ATTACHED AT ITS UPPER END TO SAID DRILL STRING, AN ANVIL POSITIONED IN SAID OUTER CASE ASSEMBLY, MEANS FOR ROTATABLY AND SLIDEABLY SUPPORTING SAID ANVIL TO SAID OTER CASE ASSEMBLY, A DRILL BIT CONNECTED TO SAID ANVIL, A HAMMER POSITIONED ABOVE SAID ANVIL, A CLUTCH CONNECTING SAID ANVIL TO SAID HAMMER, A DRIVE SHAFT POSITIONED IN SAID HAMMER, A PRIME MOVER CONNECTED ON SAID OUTER CASE ASSEMBLY, COUPLING MEANS FOR COUPLING SAID HAMMER AND SAID DRIVE SHAFT FOR PROVIDING ROTATIONAL AND LONGITUDINAL MOVEMENT OF THE HAMMER RELATIVE TO SAID SHAFT AND RESILIENT MEANS TENDING TO RESIST LONGITUDINAL MOVEMENT OF SAID HAMMER AND URGE SAID CLUTCH INTO ENGAGEMENT TO CONNECT SAID ANVIL WITH SAID HAMMER.
Claim 2
Dependent Claim
136 words
AN APPARTUS FOR DRILLING A BOREHOLE IN THE EARTH INCLUDING A DRILL STRING AND COMPRISING AN OUTER CASE ASSEMBLY ADAPTED TO BE ATTACHED AT ITS UPPER END TO SAID DRILL STRING, AN ANVIL POSITIONED IN SAID OUTER CASE ASSEMBLY, MEANS FOR ROTATABLY AND SLIDEABLY SUPPORTING SAID ANVIL TO SAID OTER CASE ASSEMBLY, A DRILL BIT CONNECTED TO SAID ANVIL, A HAMMER POSITIONED ABOVE SAID ANVIL, A CLUTCH CONNECTING SAID ANVIL TO SAID HAMMER, A DRIVE SHAFT POSITIONED IN SAID HAMMER, A PRIME MOVER CONNECTED ON SAID OUTER CASE ASSEMBLY, COUPLING MEANS FOR COUPLING SAID HAMMER AND SAID DRIVE SHAFT FOR PROVIDING ROTATIONAL AND LONGITUDINAL MOVEMENT OF THE HAMMER RELATIVE TO SAID SHAFT AND RESILIENT MEANS TENDING TO RESIST LONGITUDINAL MOVEMENT OF SAID HAMMER AND URGE SAID CLUTCH INTO ENGAGEMENT TO CONNECT SAID ANVIL WITH SAID HAMMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |