US3132703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drilling mechanism
Assignee: Atlas Copco AB
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Filing: 1956-05-15
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Granted: 1964-05-12
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Larcen Jan August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
283 words
A ROCK DRILLING MECHANISM COMPRISING A DRILL STEEL ACTUATING MOTOR AND A FEEDING DEVICE FOR MOVEMENT OF SAID MOTOR TOWARD A ROCK FACE TO BE DRILLED, A WORKING CYLINDER FOR COMPRESSED AIR IN SAID MOTOR, PASSAGES IN THE MOTOR FOR CONVEYING FLUSHING WATER TO A FLUSHING MEDIUM DUCT IN SAID DRILL STEEL, PASSAGES IN THE MOTOR FOR CONVEYING COMPRESSED AIR TO SAID FLUSHING MEDIUM DUCT IN THE DRILL STEEL, PASSAGES IN THE MOTOR FOR SUPPLYING COMPRESSED AIR TO SAID WORKING CYLINDER OF THE MOTOR FOR DRIVING THE SAME, PASSAGES IN THE MOTOR FOR CONVEYING COMPRESSED AIR TO SAID FEEDING DEVICE AND FOR VENTING AIR FROM THE FEEDING DEVICE, COMPRESSED AIR AND FLUSHING WATER CONNECTIONS AT ONE LONGITUDINAL SIDE OF SAID MOTOR, MEANS IN THE MOTOR FOR CONTROLLING THE FLUSHING WATER PASSAGES, A MAIN VALVE IN SAID MOTOR ARRANGED FOR CONTROL OF SAID FLUSHING WATER CONTROLLING MEANS AND SAID COMPRESSED AIR PASSAGES AND COMPRISING A CYLINDRICAL MAIN VALVE MEMBER MOUNTED TO TURN IN THE MOTOR IN A CYLINDRICAL BORE WITH THE BORE AXIS SUBSTANTIALLY PARALLEL TO THE AXIS OF THE WORKING CYLINDER, AN OPERATING LEVER FOR TURNING SAID MAIN VALVE MEMBER FROM A POSITION IN WHICH AIR IS SUPPLIED TO THE FLUSHING MEDIUM DUCT TO A POSITION IN WHICH AIR IS SUPPLIED TO THE FEEDING DEVICE THEN TO A POSITION IN WHICH WATER IS SUPPLIED TO THE FLUSHING MEDIUM DUCT AND AIR IS STILL SUPPLIED TO THE FEEDING DEVICE AND THEN TO POSITIONS IN WHICH AIR IS SUPPLIED TO THE MOTOR AND THE FEEDING DEVICE AND WATER TO THE FLUSHING MEDIUM DUCT, A PRESSURE REDUCTION DEVICE PROVIDED WITH AN OPERATING MEMBER FOR CONTROLLING THE PRESSURE OF THE COMPRESSED AIR SUPPLIED TO THE FEEDING DE-
Claim 2
Dependent Claim
283 words
A ROCK DRILLING MECHANISM COMPRISING A DRILL STEEL ACTUATING MOTOR AND A FEEDING DEVICE FOR MOVEMENT OF SAID MOTOR TOWARD A ROCK FACE TO BE DRILLED, A WORKING CYLINDER FOR COMPRESSED AIR IN SAID MOTOR, PASSAGES IN THE MOTOR FOR CONVEYING FLUSHING WATER TO A FLUSHING MEDIUM DUCT IN SAID DRILL STEEL, PASSAGES IN THE MOTOR FOR CONVEYING COMPRESSED AIR TO SAID FLUSHING MEDIUM DUCT IN THE DRILL STEEL, PASSAGES IN THE MOTOR FOR SUPPLYING COMPRESSED AIR TO SAID WORKING CYLINDER OF THE MOTOR FOR DRIVING THE SAME, PASSAGES IN THE MOTOR FOR CONVEYING COMPRESSED AIR TO SAID FEEDING DEVICE AND FOR VENTING AIR FROM THE FEEDING DEVICE, COMPRESSED AIR AND FLUSHING WATER CONNECTIONS AT ONE LONGITUDINAL SIDE OF SAID MOTOR, MEANS IN THE MOTOR FOR CONTROLLING THE FLUSHING WATER PASSAGES, A MAIN VALVE IN SAID MOTOR ARRANGED FOR CONTROL OF SAID FLUSHING WATER CONTROLLING MEANS AND SAID COMPRESSED AIR PASSAGES AND COMPRISING A CYLINDRICAL MAIN VALVE MEMBER MOUNTED TO TURN IN THE MOTOR IN A CYLINDRICAL BORE WITH THE BORE AXIS SUBSTANTIALLY PARALLEL TO THE AXIS OF THE WORKING CYLINDER, AN OPERATING LEVER FOR TURNING SAID MAIN VALVE MEMBER FROM A POSITION IN WHICH AIR IS SUPPLIED TO THE FLUSHING MEDIUM DUCT TO A POSITION IN WHICH AIR IS SUPPLIED TO THE FEEDING DEVICE THEN TO A POSITION IN WHICH WATER IS SUPPLIED TO THE FLUSHING MEDIUM DUCT AND AIR IS STILL SUPPLIED TO THE FEEDING DEVICE AND THEN TO POSITIONS IN WHICH AIR IS SUPPLIED TO THE MOTOR AND THE FEEDING DEVICE AND WATER TO THE FLUSHING MEDIUM DUCT, A PRESSURE REDUCTION DEVICE PROVIDED WITH AN OPERATING MEMBER FOR CONTROLLING THE PRESSURE OF THE COMPRESSED AIR SUPPLIED TO THE FEEDING DE-
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |