US3306668A
Expired / Lapsed
US
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Apparatus for crust breaking
Assignee: Ardal og Sunndal Verk AS
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Filing: 1963-09-03
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Granted: 1967-02-28
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Ellingsaeter Knut
- 👤 Rortveit Ole Naess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:12
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/28; B25D17/32; C; C25; C25C; C25C3/00; C25C3/06; C25C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
APPARATUS FOR BREAKING THE CRUST IN A METAL-PRODUCING ELECTROLYTIC CELL CONTAINING A SUSPENDED ELECTRODE, COMPRISING A SUPPORT MOVABLE ALONG THE CELL, A CRUSTBREAKING TOOL CARRIED BY SAID SUPPORT, MEANS FOR PRESSING THE TOOL DOWN AGAINST THE CRUST TO A POSITION IN WHICH THE LOWERMOST POINT OF THE TOOL IS SITUATED A DISTANCE BELOW A PLANE GENERALLY FLUSH WITH THE UPPER SURFACE OF THE CRUST, MEANS FOR MOVING SAID SUPPORT ALONG THE CELL, MEANS FOR MAINTAINING THE TOOL IN ITS LOWERED POSITION DURING THE MOVEMENT OF THE SUPPORT AND THE TOOL, SAID TOOL COMPRISING A HUB HAVING A PLURALITY OF RADIALLY EXTENDING ELEMENTS, A SUBSTANTIALLY HORIZONTAL AXIS ON SAID SUPPORT SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF MOVEMENT OF SAID SUPPORT ON WHICH SAID HUB IS ROTATABLY MOUNTED, WHEREBY SAID HUB AND RADIALLY EXTENDING ELEMENTS MAY ROLL ON THE SURFACE OF SAID CRUST AND SAID ELEMENTS ARE FORCED DOWN THROUGH SAID CRUST.
Claim 2
Dependent Claim
150 words
APPARATUS FOR BREAKING THE CRUST IN A METAL-PRODUCING ELECTROLYTIC CELL CONTAINING A SUSPENDED ELECTRODE, COMPRISING A SUPPORT MOVABLE ALONG THE CELL, A CRUSTBREAKING TOOL CARRIED BY SAID SUPPORT, MEANS FOR PRESSING THE TOOL DOWN AGAINST THE CRUST TO A POSITION IN WHICH THE LOWERMOST POINT OF THE TOOL IS SITUATED A DISTANCE BELOW A PLANE GENERALLY FLUSH WITH THE UPPER SURFACE OF THE CRUST, MEANS FOR MOVING SAID SUPPORT ALONG THE CELL, MEANS FOR MAINTAINING THE TOOL IN ITS LOWERED POSITION DURING THE MOVEMENT OF THE SUPPORT AND THE TOOL, SAID TOOL COMPRISING A HUB HAVING A PLURALITY OF RADIALLY EXTENDING ELEMENTS, A SUBSTANTIALLY HORIZONTAL AXIS ON SAID SUPPORT SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF MOVEMENT OF SAID SUPPORT ON WHICH SAID HUB IS ROTATABLY MOUNTED, WHEREBY SAID HUB AND RADIALLY EXTENDING ELEMENTS MAY ROLL ON THE SURFACE OF SAID CRUST AND SAID ELEMENTS ARE FORCED DOWN THROUGH SAID CRUST.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |