US3877650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition for tumbling mills or the like
Assignee: Aerofall Mills Ltd
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Filing: 1974-02-19
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Granted: 1975-04-15
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Expires: 1994-02-19
Abstract
Abstract A tumbling mill or like apparatus having a generally horizontally mounted rotary drum along which a charge is caused to flow from a first zone of the drum to a second zone includes an intermediate zone at which an additional material is introduced into the drum to be added to the charge. Deflector means in the intermediate zone ensure that the charge and additional material proceed to the second zone, the deflector means providing a trap to prevent material from passing back to the first zone. The additional material may be a gas or vapour, or a solid or liquid material or slurry.
Inventors
- 👤 Arthur Selwyn Cornford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:57
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/04; B02C17/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
299 words
In an apparatus comprising a horizontally mounted rotarY drum along which a charge is caused to flow from an upstream zone of the drum to a downstream zone which is axially spaced from the upstream zone, means defining an intermediate zone at which an additional material may be introduced into the charge, said means comprising a plurality of axially spaced transverse drum partitions defining first, second and third lifting chambers, the first chamber including inlet means communicating with said upstream zone for admitting charge from the upstream zone to the first chamber, outlet means communication with a central region of the second chamber, and conical deflector means extending axially across the first chamber for substantially the entire axial length thereof, said conical deflector means cooperating with said outlet means for deflecting charge from the first chamber to a central region of the second chamber, the second chamber including outlet means communicating with the third chamber, and annular deflector means extending axially across the second chamber for substantially the entire axial length thereof, said annular deflector means defining an annular region of the second chamber partitioned from the central region, the second chamber further including peripheral inlet means communicating with said annular region for the admission of additional material thereto, the annular deflector means providing a pair of inner and outer frusto-conical deflector surfaces cooperating with the outlet means of the second chamber for deflecting charge from said central region, and material from said annular region, into the third chamber, the third chamber including outlet means communicating with said downstream zone and conical deflector means extending axially across the third chamber for substantially the entire axial length thereof, said conical deflector means cooperating with the outlet means of the third chamber for deflecting the charge and said additional material therethrough.
Claim 2
Dependent Claim
299 words
In an apparatus comprising a horizontally mounted rotarY drum along which a charge is caused to flow from an upstream zone of the drum to a downstream zone which is axially spaced from the upstream zone, means defining an intermediate zone at which an additional material may be introduced into the charge, said means comprising a plurality of axially spaced transverse drum partitions defining first, second and third lifting chambers, the first chamber including inlet means communicating with said upstream zone for admitting charge from the upstream zone to the first chamber, outlet means communication with a central region of the second chamber, and conical deflector means extending axially across the first chamber for substantially the entire axial length thereof, said conical deflector means cooperating with said outlet means for deflecting charge from the first chamber to a central region of the second chamber, the second chamber including outlet means communicating with the third chamber, and annular deflector means extending axially across the second chamber for substantially the entire axial length thereof, said annular deflector means defining an annular region of the second chamber partitioned from the central region, the second chamber further including peripheral inlet means communicating with said annular region for the admission of additional material thereto, the annular deflector means providing a pair of inner and outer frusto-conical deflector surfaces cooperating with the outlet means of the second chamber for deflecting charge from said central region, and material from said annular region, into the third chamber, the third chamber including outlet means communicating with said downstream zone and conical deflector means extending axially across the third chamber for substantially the entire axial length thereof, said conical deflector means cooperating with the outlet means of the third chamber for deflecting the charge and said additional material therethrough.
Claim 3
Dependent Claim
63 words
Apparatus according to claim 1, wherein the chambers are defined by first, second, third and fourth drum partitions, the first drum partition including an annular grid defining said inlet means, and said outlet means being defined by respective openings in the second, third and fourth partitions, said grid, said openings, and said defector means being coaxial with one another and with the drum.
Claim 4
Dependent Claim
40 words
Apparatus according to claim 1, including an annular casing encircling the external surface of the drum at said intermediate zone and defining therewith a manifold communicating with said peripheral inlet means, and means for supplying a gas to the manifold.
Claim 5
Dependent Claim
61 words
Apparatus according to claim 1, including an annular casing encircling the external surface of the drum at said intermediate zone and defining therewith an annular chute communicating with said peripheral inlet means, means for supplying heavier than air material to the chute, and scoop means connected to the drum and rotatable therewith for conveying said material to the peripheral inlet means.
References Cited (Backward Citations)
US2031710A
Cited
US2805827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |