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US3771971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomerating with independently rotatable screen and drum
Assignee: Canadian Patents and Development Ltd
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Filing: 1971-10-29
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Granted: 1973-11-13
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Expires: 1991-10-29
Abstract
Abstract A ball agglomerating apparatus comprises a rotatable ball agglomerating, tumbling drum having an agglomerate ball classifying screen rotatably mounted therein and scrolled to spiral outwardly from the drum centre to adjacent the drum curved inner surface. The drum rotates at a faster speed than the screen so that agglomerate balls are formed in the drum by feeding particulate material, liquid suspendant, and an agglomerating liquid immiscible, with the suspendant into the rotating drum, the agglomerate balls are then scooped up by the screen and classified as they are conveyed inwardly along the spiral to finally emerge from a drum outlet.
Inventors
- 👤 C Capes
- 👤 R Coleman
- 👤 W Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:14
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
Apparatus according to claim 1, wherein a rotatably mounted slotted, hollow shaft has the classifying screen mounted on it and extends along the axis of rotation of the drum through the agglomerate ball outlet to an open end of the hollow shaft outside thE drum, the slot in the slotted hollow shaft extends along the classifying screen with the spiral of the classifying screen extending over the slot, and closure means sealing the end of the shaft within the drum.
Claim 2
Dependent Claim
17 words
Apparatus according to claim 2, wherein an agglomerate ball conveying helix extends along the slotted, shallow shaft.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, wherein means are provided for recirculating liquid to the drum which overflows out of the agglomerate ball outlet.
Claim 4
Independent Claim
131 words
A method of ball agglomerating particulate material from a mixture of the material, a liquid suspendant, and an agglomerating liquid immiscible with the liquid suspendant, comprising feeding the mixture into a rotating ball agglomerating drum to tumble the mixture and produce agglomerate balls from it, lifting the balls in the drum by means of a scroll shaped agglomerate ball classifying screen which is rotating in the outwardly spiralling direction of the screen and at a slower speed than and smaller number of revolutions per minute than the drum, so that the agglomerate balls only classified by being of a predetermined minimum size by the screen are conveyed inwardly along the spiral of the screen, and then removing the classified balls from the drum which have been so conveyed by the screen.
References Cited (Backward Citations)
US300715A
Cited
US613002A
Cited
US971825A
Cited
US2617273A
Cited
FR1117078A
Cited
US2851829A
Cited
US3471267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |