Patent US3578296A successfully refreshed from Google Patents.
US3578296A
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Apparatus for treating particulate materials
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1969-06-27
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Granted: 1971-05-11
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Expires: 1989-06-27
Abstract
Abstract Apparatus for drying particulate materials having particles of different sizes comprises an upright vessel provided with a grate whose upper surface slopes toward a central opening and receives material from a rotary distributor. Products of combustion are fed into the vessel below the grate so that the ascending gas fluidizes the material above the grate. The material travels toward and into the opening of the grate and is evacuated by way of a central conduit to enter an adjustable pneumatic conveyor which classifies treated material according to size. A revolving scraper is employed to prevent clogging of the grate and/or caking of material along its upper surface.
Inventors
- 👤 Michel Boucraut
- 👤 Imre Toth
- 👤 Jean Pierre Reyter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:34
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
Apparatus as defined in claim 1, wherein said upper surface is of conical shape and wherein said feeding means comprises means for effecting substantially uniform distribution of supplied material along said upper surface.
Claim 2
Dependent Claim
27 words
Apparatus as defined in claim 1, wherein said evacuating means comprises means for regulating the rate of evacuation of treated material by way of said conduit means.
Claim 3
Dependent Claim
34 words
Apparatus as defined in claim 1, further comprising rotary scraper means provided in said upper chamber to travel along said upper surface and to thus prevent caking of material and clogging of said grate.
Claim 4
Dependent Claim
27 words
Apparatus as defined in claim 1, wherein said feeding means comprises a rotary distribution having an outlet arranged to travel along the upper surface of said grate.
Claim 5
Dependent Claim
25 words
Apparatus as defined in claim 1, wherein said evacuating means further comprises an adjustable pneumatic conveyor arranged to receive treated particles from said conduit means.
Claim 6
Dependent Claim
19 words
Apparatus as defined in claim 6, wherein said pneumatic conveyor comprises means for classifying treated particles according to size.
Claim 7
Dependent Claim
36 words
Apparatus as defined in claim 1, wherein said vessel comprises an upright cylinder and wherein said means for admitting treating fluid comprises a combustion chamber and conduit means connecting said combustion chamber with said lower chamber.
Claim 8
Dependent Claim
35 words
Apparatus as defined in claim 1, wherein said feeding means comprises a driven distributor which is substantially coaxial with said conduit means and wherein said upper chamber is provided with outlet means for treating fluid.
Claim 9
Dependent Claim
75 words
Apparatus as defined in claim 1, wherein said evacuating means further comprises a pneumatic conveyor having an inclined pipe extending across said lower chamber and having an air-admitting inlet at the one end and a plurality of outlets at the other end thereof, said conveyor further comprising a perforated partition dividing said pipe into a pair of compartments one of which communicates with said conduit means and the other of which communicates with said inlet.
References Cited (Backward Citations)
US2699375A
Cited
US3360866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |