US3074381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill rotation mechanism
Assignee: Joy Manufacturing Co
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Filing: 1961-07-12
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Granted: 1963-01-22
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Expires: 1981-07-12
Abstract
No abstract record available.
Inventors
- 👤 Charles F Osgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:06
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A ROCK DRILL, THE COMBINATION COMPRISING A HAMMER MOTOR HAVING A CYLINDER CONTAINING A RECIPROCABLE HAMMER PISTON FOR PERCUSSIVELY ACTUATING A DRILLING IMPLEMENT, UNIDIRECTIONAL INTERMITTENT ROTATION MEANS FOR INTERMITTENTLY ROTATING THE DRILLING IMPLEMENT AS IT IS PERCUSSIVELY ACTUATED, FRICTIONAL SLIP CONTROL MEANS FOR SAID UNIDIRECTIONAL INTERMITTENT ROTATION MEANS FOR RENDERING THE SAME INEFFECTIVE, INDEPENDENT REVERSIBLE ROTATION MEANS
Claim 2
Dependent Claim
58 words
IN A ROCK DRILL, THE COMBINATION COMPRISING A HAMMER MOTOR HAVING A CYLINDER CONTAINING A RECIPROCABLE HAMMER PISTON FOR PERCUSSIVELY ACTUATING A DRILLING IMPLEMENT, UNIDIRECTIONAL INTERMITTENT ROTATION MEANS FOR INTERMITTENTLY ROTATING THE DRILLING IMPLEMENT AS IT IS PERCUSSIVELY ACTUATED, FRICTIONAL SLIP CONTROL MEANS FOR SAID UNIDIRECTIONAL INTERMITTENT ROTATION MEANS FOR RENDERING THE SAME INEFFECTIVE, INDEPENDENT REVERSIBLE ROTATION MEANS
References Cited (Backward Citations)
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Cited
US1740684A
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US1709440A
Cited
US1540909A
Cited
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |