Patent USRE30901E successfully refreshed from Google Patents.
Patent US3702162A successfully refreshed from Google Patents.
US3702162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable support for ring drilling
Assignee: Tampella Oy AB
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Filing: 1970-12-15
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Granted: 1972-11-07
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Expires: 1990-12-15
Abstract
Abstract THE PRESENT INVENTION CONCERNS A RING DRILLING DEVICE ADAPTED FOR OPERATING IN A TUNNEL AND COMPRISING A BOOM ROTATING ABOUT ITS LONGITUDINAL AXIS AND TO WHICH IS ATTACHED A CRADLE TRANSVERSE THERETO FOR THE FEEDING DEVICE FOR THE ROCK DRILL. ON THE ROTATABLE BOOM, THERE IS MOUNTED A BOOM HEAD TURNABLE ABOUT AN AXIS PERPENDICULAR TO SAID BOOM, THE CRADLE BEING MOUNTED ON THIS TURNABLE BOOM HEAD TO BE ROTATABLE ABOUT IS LONGITUDINAL AXIS.
Inventors
- 👤 Teuvo Gronfors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:30
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/006; E21B; E21B7/00; E21B7/02; E21B7/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |