US3094289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock grinding system
Assignee: Bolidens Gruvaktiebolag
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Filing: 1960-01-07
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Granted: 1963-06-18
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Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 Fahlstro Per Ander Henningsson
- 👤 Lundberg Henry Lennart
- 👤 Holmberg Goran Ingvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:52
CPC Classifications
B; B02; B02C; B02C23/00; B02C17/00; B02C21/00; B02C25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A DEVICE FOR COMMUNICATING A MATERIAL CONSISTING OF SOLID PIECES OF PREFERABLY CRYSTALLINE STRUCTURE, FOR INSTANCE ORE, TO A WATER SUSPENSION OF FINELY GROUND MATERIAL HAVING A SUBSTANTIALLY PREDETERMINED DENSITY, COMPRISING A ROTATABLE GRINDING DRUM PROVIDED WITH FEEDING DEVICES FOR MATERIAL TO BE GROUND AND DEVICES FOR DISHCARGING A PLUP COMPRISING FINELY AND PARTLY FINELY GROUND MATERIAL AND ALSO WITH A DRIVING DEVICE, IN WHICH GRINDING DRUM THE GRINDING MATERIAL WITHOUT THE PRESENCE OF FOREIGN GRINDING BODIES IS CAUSED TO ACT AS GRINDING BODIES AND CRUSH AND GRIND ITSELF, A PIPE WITH A CONTROL VALVE FOR ADJUSTABLY ADDING WATER TO THE GRINDING DRUM, DEVICES FOR SEPARATION OF THE PULP COMPRISING FINELY OR PARTLY FINELY GROUND MATERIAL FROM COARSE PIECES OF THE MATERIAL SUBJACTED TO GRINDING, DEVICES FOR CONVEYING THE PULP COMPRISING FINELY AND PARTLY FINELY GROUND MATERIALS DISCHARGED FROM THE GRINDING DRUM, A FLOW METER FOR MEASURING THE RATE OF FLOW OF THE PULP, A DENSITY METER, MEANS
Claim 2
Independent Claim
158 words
A DEVICE FOR COMMUNICATING A MATERIAL CONSISTING OF SOLID PIECES OF PREFERABLY CRYSTALLINE STRUCTURE, FOR INSTANCE ORE, TO A WATER SUSPENSION OF FINELY GROUND MATERIAL HAVING A SUBSTANTIALLY PREDETERMINED DENSITY, COMPRISING A ROTATABLE GRINDING DRUM PROVIDED WITH FEEDING DEVICES FOR MATERIAL TO BE GROUND AND DEVICES FOR DISHCARGING A PLUP COMPRISING FINELY AND PARTLY FINELY GROUND MATERIAL AND ALSO WITH A DRIVING DEVICE, IN WHICH GRINDING DRUM THE GRINDING MATERIAL WITHOUT THE PRESENCE OF FOREIGN GRINDING BODIES IS CAUSED TO ACT AS GRINDING BODIES AND CRUSH AND GRIND ITSELF, A PIPE WITH A CONTROL VALVE FOR ADJUSTABLY ADDING WATER TO THE GRINDING DRUM, DEVICES FOR SEPARATION OF THE PULP COMPRISING FINELY OR PARTLY FINELY GROUND MATERIAL FROM COARSE PIECES OF THE MATERIAL SUBJACTED TO GRINDING, DEVICES FOR CONVEYING THE PULP COMPRISING FINELY AND PARTLY FINELY GROUND MATERIALS DISCHARGED FROM THE GRINDING DRUM, A FLOW METER FOR MEASURING THE RATE OF FLOW OF THE PULP, A DENSITY METER, MEANS
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |