US3193024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion drills with exhaust passage in hammer
Assignee: Atlantic Richfield Co
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Filing: 1962-01-18
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Granted: 1965-07-06
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Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 James M Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:26
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
167 words
A PERCUSSION UNIT FOR A PERCUSSION DRILL COMPRISING AN ELONGATED TUBULAR CASING ADAPTED FOR REMOVABLE ATTACHMENT TO THE LOWER END OF A STRING OF DRILL PIPE, ANVIL AND BIT MEANS SLIDABLY MOUNTED IN THE LOWER END OF SAID CASING AND ADAPTED TO ROTATE WITH SAID CASING AND HAVING A CENTRAL PASSAGE THERETHROUGH, PISTON-TYPE HAMMER MEANS HAVING AN UPPER END AND A LOWER END AND SLIDABLY MOUNTED IN THE CENTRAL PORTION OF SAID CASING AND ADAPTED TO STRIKE SAID ANVIL DURING THE POWER STROKE OF SAID HAMMER MEANS, RIGID POWER FLUID EXHAUST TUBE MEANS HAVING AN UPPER END AND A LOWER END AND PASSING THROUGH SAID HAMMER MEANS AND INTO SAID PASSAGE OF SAID ANVIL AND BIT MEANS FORMING A SUBSTANTIALLY FLUID TIGHT SEAL THEREBETWEEN AT LEAST DURING THE NORMAL POWER AND RETURN, STROKES OF SAID HAMMER MEANS AND ADAPTED TO PROVIDE COMMUNICATION BETWEEN SAID DRILL PIPE AND SAID PASSAGE THROUGH SAID ANVIL AND BIT MEANS, SAID EXHAUST TUBE MEANS BEING ADAPTED FOR LIMITED VERTICAL MOVEMENT RELATIVE TO
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |