Patent US3969226A successfully refreshed from Google Patents.
US3969226A
Expired / Lapsed
US
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Horizontal drum-type magnetic separator for granular feeds
Assignee: Berger Maschinenfabriken GmbH and Co
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Filing: 1974-03-28
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Granted: 1976-07-13
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Expires: 1994-03-28
Abstract
Abstract A horizontal drum-type magnetic separator for granular feeds of magnetic and nonmagnetic materials utilizing a drum rotatable about an axis of rotation into which granular feeds are infed. A magnetic field is created as by a plurality of magnets disposed about the outer periphery of the drum. A first chute is provided within the drum for collecting the nonmagnetic material as the granular feed passes through the magnetic field and a second chute is provided for collecting the magnetic material after the granular feed passes through the magnetic field.
Inventors
- 👤 Johann Moelders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:58
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
188 words
A drum-type magnetic separator for granular feeds of magnetic and nonmagnetic materials comprising: a rotatable drum having an axis of rotation, means for feeding the granular feeds into said drum, means for regulating infeed of the granular feed inside and throughout the length of said drum, means to adjust the position of said regulating means with respect to the inner surface of said drum, means for thrusting the granular feed of magnetic and nonmagnetic material thru said drum means for creating a magnetic field disposed about a portion of the outer periphery of said drum, a first chute located substantially above said axis of rotation and below said means for creating a magnetic field for collecting any nonmagnetic material carried with the magnetic material above said axis of rotation, a second chute extending substantially radially of said axis of rotation and having an opening above said axis of rotation and behind said first chute for collecting the magnetic material after the granular feed passes through the magnetic field, and means for adjusting said first chute with respect to said second chute and the inner surface of said drum.
Claim 2
Dependent Claim
188 words
A drum-type magnetic separator for granular feeds of magnetic and nonmagnetic materials comprising: a rotatable drum having an axis of rotation, means for feeding the granular feeds into said drum, means for regulating infeed of the granular feed inside and throughout the length of said drum, means to adjust the position of said regulating means with respect to the inner surface of said drum, means for thrusting the granular feed of magnetic and nonmagnetic material thru said drum means for creating a magnetic field disposed about a portion of the outer periphery of said drum, a first chute located substantially above said axis of rotation and below said means for creating a magnetic field for collecting any nonmagnetic material carried with the magnetic material above said axis of rotation, a second chute extending substantially radially of said axis of rotation and having an opening above said axis of rotation and behind said first chute for collecting the magnetic material after the granular feed passes through the magnetic field, and means for adjusting said first chute with respect to said second chute and the inner surface of said drum.
Claim 3
Dependent Claim
62 words
A drum-type magnetic separator as set forth in claim 1, wherein the means for creating a magnetic field comprises: a plurality of magnets forming a semi-circular bank disposed about the circumference of said drum, said magnets being positioned immediately above the lowest point of the periphery of said drum and terminating just beyond the uppermost point of the periphery of said drum.
Claim 4
Dependent Claim
21 words
A drum-type magnetic separator as set forth in claim 2, wherein said magnets are concentrically adjustable in relation to said drum.
Claim 5
Dependent Claim
36 words
A drum-type magnetic separator as set forth in claim 1, wherein said means for thrusting includes a plurality of helical flight members and at least one annular control ring on said inner surface of said drum.
Claim 6
Dependent Claim
53 words
A drum-type magnetic separator as set forth in claim 1, further comprising: a screw feeder coaxially aligned with said axis of rotation and having a first and second section, said first section being for the feeding of the granular feed and said second section being for the discharge of the separated magnetic material.
Claim 7
Dependent Claim
34 words
A drum-type magnetic separator as set forth in claim 5, wherein said second section of said screw feeder projects beyond the end of said drum and discharges the magnetic material into an air classifier.
Claim 8
Dependent Claim
24 words
A drum-type magnetic separator as set forth in claim 5, wherein said drum and said screw feeder are mounted on a common driving shaft.
Claim 9
Dependent Claim
41 words
A drum-type magnetic separator as set forth in claim 6, wherein one end of said drum is mounted on a spider secured to said drum shaft and the other end of said drum is mounted in a plurality of adjustable rollers.
Claim 10
Dependent Claim
46 words
A drum-type magnetic separator as set forth in claim 1, wherein said means for feeding the granular feeds into said drum includes a cone-shaped inlet mounted outside of said drum for receiving and feeding the granular feed material into said drum below said axis of rotation.
Claim 11
Dependent Claim
27 words
A drum-type magnetic separator as set forth in claim 1, wherein said means for regulating infeed of the granular feed inside said drum is a resilient scraper.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |