Patent US3232419A successfully refreshed from Google Patents.
US3232419A
Expired / Lapsed
US
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Apparatus for conveying finely divided material
Assignee: FLSmidth and Co AS
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Filing: 1963-07-10
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Granted: 1966-02-01
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Expires: 1983-07-10
Abstract
No abstract record available.
Inventors
- 👤 Rasmussen Enok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:34
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0092; B65; B65G; B65G33/00; B65G53/00; B65G53/34; B65G53/40; B65G53/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A SCREW CONVEYOR COMPRISING A CASING HAVING AN INLET OPEN TO A REGION AT ONE PRESSURE AND AN OUTLET OPEN TO A REGION AT A DIFFERENT PRESSURE, A SHAFT EXTENDING THROUGH THE CASING FROM THE INLET TO THE OUTLET, A SCREW IMPELLER ON THE SHAFT FOR ADVANCING MATERIAL THROUGH THE CASING FROM THE INLET TOWARD THE OUTLET, MEANS DEFINGING A CHAMBER ABOVE AND OPEN TO THE CASING BETWEEN THE INLET AND THE OUTLET, AND A SCREW IMPELLER ON THE SHAFT BELOW THE CHAMBER AND OF A HAND OPPOSITE TO THAT OF THE FIRST IMPELLER FOR BACKING UP THE MATERIAL TO FORM A PILE OF MATERIAL IN THE CHAMBER SEALING THE CASING AT THE UPSTREAM SIDE OF THE CHAMBER AND HAVING AN INCLINED SURFACE DOWN WHICH THE MATERIAL SLIDES INTO THE CASING NEAR THE DOWNSTREAM SIDE OF THE CHAMBER.
Claim 2
Dependent Claim
138 words
A SCREW CONVEYOR COMPRISING A CASING HAVING AN INLET OPEN TO A REGION AT ONE PRESSURE AND AN OUTLET OPEN TO A REGION AT A DIFFERENT PRESSURE, A SHAFT EXTENDING THROUGH THE CASING FROM THE INLET TO THE OUTLET, A SCREW IMPELLER ON THE SHAFT FOR ADVANCING MATERIAL THROUGH THE CASING FROM THE INLET TOWARD THE OUTLET, MEANS DEFINGING A CHAMBER ABOVE AND OPEN TO THE CASING BETWEEN THE INLET AND THE OUTLET, AND A SCREW IMPELLER ON THE SHAFT BELOW THE CHAMBER AND OF A HAND OPPOSITE TO THAT OF THE FIRST IMPELLER FOR BACKING UP THE MATERIAL TO FORM A PILE OF MATERIAL IN THE CHAMBER SEALING THE CASING AT THE UPSTREAM SIDE OF THE CHAMBER AND HAVING AN INCLINED SURFACE DOWN WHICH THE MATERIAL SLIDES INTO THE CASING NEAR THE DOWNSTREAM SIDE OF THE CHAMBER.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |