Patent US2813887A successfully refreshed from Google Patents.
Patent US4000062A successfully refreshed from Google Patents.
US4000062A
Expired / Lapsed
US
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Magnetic particle separator
Assignee: 3M Co
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Filing: 1975-04-21
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Granted: 1976-12-28
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Expires: 1995-04-21
Abstract
Abstract A separator for separating small permanent magnetic particles from larger objects comprising a non-magnetic perforated basket within a non-magnetic solid wall container, both within a generally vertical rotating magnetic field. The basket supports the mixture of permanent magnetic particles and objects and has perforations larger than the permanent magnetic particles and smaller than the objects. The container extends below the magnetic field to receive the magnetic particles as they are separated and to retain them outside of the influence of the magnetic field.
Inventors
- 👤 David D. Keane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:40
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/23; B03C1/24; B03C1/253
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A separator for separating small permanent magnetic particles from larger objects comprising: means for generating a rotating magnetic field in a predetermined cylindrical volume, the axis of rotation of said cylindrical volume being positioned generally vertically, a stationary non-magnetic perforated basket for supporting the mixture of permanent magnetic particles and objects, said basket having perforations larger than the magnetic particles and smaller than the objects from which the magnetic particles are to be separated, said basket being positioned in said rotating magnetic field, a non-magnetic, solid wall, hollow container surrounding said basket within said rotating magnetic field, the interior of said container being spaced radially from the exterior of said basket, said container extending below said rotating magnetic field and having its lower end closed to define a receptacle for the magnetic particles outside of the influence of said rotating magnetic field.
Claim 2
Dependent Claim
142 words
A separator for separating small permanent magnetic particles from larger objects comprising: means for generating a rotating magnetic field in a predetermined cylindrical volume, the axis of rotation of said cylindrical volume being positioned generally vertically, a stationary non-magnetic perforated basket for supporting the mixture of permanent magnetic particles and objects, said basket having perforations larger than the magnetic particles and smaller than the objects from which the magnetic particles are to be separated, said basket being positioned in said rotating magnetic field, a non-magnetic, solid wall, hollow container surrounding said basket within said rotating magnetic field, the interior of said container being spaced radially from the exterior of said basket, said container extending below said rotating magnetic field and having its lower end closed to define a receptacle for the magnetic particles outside of the influence of said rotating magnetic field.
Claim 3
Dependent Claim
13 words
The separator of claim 1 wherein said basket and said container are cylindrical.
Claim 4
Dependent Claim
38 words
The separator of claim 1 including a stationary support to removably support said container and wherein said container is formed to removably support said basket in said rotating magnetic field when said container is supported by said support.
Claim 5
Dependent Claim
40 words
The separator of claim 3 wherein said stationary support comprises a non-magnetic hollow cylinder within said rotating magnetic field to guide said container supporting said basket into proper position in said rotating magnetic field and to there support said container.
References Cited (Backward Citations)
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GB190805198A
Cited
US1605117A
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Cited
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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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |