US3154158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill
Assignee: Ingersoll Rand Co
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Filing: 1962-02-15
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Granted: 1964-10-27
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Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 Paul A Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; E21B10/485; E21B19/00; E21B19/08; E21B19/084; E21B6/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A COMPRESSED AIR ACTUATED CORE DRILL COMPRISING: A BODY; AN ELONGATED TUBULAR SHAFT MEMBER HAVING ONE END SLIDABLY MOUNTED ON SAID BODY AND CARRYING AN ANNULAR BIT AT ITS OTHER END; A TUBULAR RECIPROCATING PISTON SLIDABLY MOUNTED ON SAID BODY FOR APPLYING A RAPID SERIES OF AXIALLY DIRECTED PERCUSSIVE IMPACTS TO SAID ONE END OF SAID TUBULAR SHAFT MEMBER; MEANS FOR RECIPROCATING THE PISTON; A TUBE FIXED ON SAID BODY AND EXTENDING AXIALLY THROUGH SAID PISTON IN SLIDING RELATIONSHIP; SAID SHAFT MEMBER, BIT AND TUBE BEING AXIALLY ALIGNED AND FORMING AN AXIAL PASSAGEWAY EXTENDING THROUGH THE BIT, SHAFT MEMBER AND TUBE FOR RECEIVING A CORE OF EARTH WHICH REMAINS AS SAID BIT CUTS AN ANNULAR TRENCH ENCIRCLING SAID CORE; AND MEANS ON SAID BODY FOR SLOWLY ROTATING SAID SHAFT MEMBER AND BIT SIMULTANEOUSLY WITH THE APPLICATION OF SAID PERCUSSIVE IMPACTS TO SAID SHAFT MEMBER BY SAID PISTON.
References Cited (Backward Citations)
DE168284C
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US766588A
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US2492158A
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US2537605A
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US2810549A
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US2998086A
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US3011570A
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US2985249A
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US3074381A
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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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |