Patent US3111176A successfully refreshed from Google Patents.
US3111176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas operated percussion drilling tool
Assignee: Pan American Petroleum Corp
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Filing: 1961-04-17
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Granted: 1963-11-19
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Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:40
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A GAS-OPERATED PERCUSSION DRILLING TOOL COMPRISING A HAMMER AND AN ANVIL, MEANS FOR CONNECTING A DRILL BIT TO SAID ANVIL, A HOUSING FOR SAID HAMMER AND ANVIL, AN EXTENSIBLE SPLINED CONNECTION BETWEEN SAID HOUSING AND SAID ANVIL, AN OPERATING GAS PASSAGEWAY THROUGH SAID HAMMER AND ANVIL, A FIRST INLET VALVE MEANS AND AN OUTLET VALVE MEANS IN SAID OPERATING GAS PASSAGEWAY ADAPTED TO OPEN AND CLOSE SAID PASSAGEWAY ALTERNATELY AS SAID HAMMER RECIPROCATES WHEN SAID SPLINED CONNECTION IS CONTRACTED, AND A SECOND INLET VALVE MEANS ADAPTED TO CLOSE SAID GAS PASSAGEWAY WHEN SAID SPLINED CONNECTION IS LONGITUDINALLY EXTENDED AND SAID OUTLET VALVE MEANS IS CLOSED.
Claim 2
Dependent Claim
105 words
A GAS-OPERATED PERCUSSION DRILLING TOOL COMPRISING A HAMMER AND AN ANVIL, MEANS FOR CONNECTING A DRILL BIT TO SAID ANVIL, A HOUSING FOR SAID HAMMER AND ANVIL, AN EXTENSIBLE SPLINED CONNECTION BETWEEN SAID HOUSING AND SAID ANVIL, AN OPERATING GAS PASSAGEWAY THROUGH SAID HAMMER AND ANVIL, A FIRST INLET VALVE MEANS AND AN OUTLET VALVE MEANS IN SAID OPERATING GAS PASSAGEWAY ADAPTED TO OPEN AND CLOSE SAID PASSAGEWAY ALTERNATELY AS SAID HAMMER RECIPROCATES WHEN SAID SPLINED CONNECTION IS CONTRACTED, AND A SECOND INLET VALVE MEANS ADAPTED TO CLOSE SAID GAS PASSAGEWAY WHEN SAID SPLINED CONNECTION IS LONGITUDINALLY EXTENDED AND SAID OUTLET VALVE MEANS IS CLOSED.
References Cited (Backward Citations)
GB191302195A
Cited
US1915071A
Cited
US2085279A
Cited
US2158568A
Cited
US2665644A
Cited
US2859733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |