US3902994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High gradient type magnetic separator with continuously moving matrix
Assignee: Individual
•
Filing: 1973-05-16
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Granted: 1975-09-02
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Expires: 1993-05-16
Abstract
Abstract Apparatus wherein a matrix is moved into and out of the influence of a magnetic field as a continuously moving element. Magnetic and non-magnetic particles to-be-separated are introduced in a liquid, in the form of a slurry, or are carried by some other fluid medium. The medium, together with the particles to-be-separated, is passed through the matrix in such a way that the average relative velocity with respect to the matrix is parallel, anti-parallel and adjustable in magnitude during the time the matrix is under the influence of the magnetic field. This unique feature allows the magnitude of the competing forces (non-magnetic) to be varied in such a way as to give effective control over the character and degree of the separation effected. The non-magnetic particles are generally removed when the medium is under the influence of the field and the magnetic particles are generally removed after the matrix has left that influence.
Inventors
- 👤 Emanuel Maxwell
- 👤 John A Oberteuffer
- 👤 David R Kelland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:25
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/029; B03C1/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
APPARATUS FOR SEPARATING MAGNETIC PARTICLES OF GREATER AND LESSER MAGNETIC MOMENT FROM A MIXTURE THEREOF CARRIED IN A FLUID VEHICLE COMPRISING: A SHAPED FIBROUS MATRIX OF MAGNETICALY PERMEABLE MATERIAL, MAGNETIC FIELD MEANS OPERATIVELY DISPOSED TO EFFECT A MAGNETIC FIELD REGION AND THROUGH WHICH FIELD REGION SAID MATRIX MOVES TO EFFECT INDUCED MAGNETIZATION IN A PORTION THEREOF AS SAID MATRIX MOVES THREREPAST, INLET MEANS FOR SAID MIXTURE OPERATIVELY DISPOSED FOR FLOWING SAID MIXTURE THROUGH SAID MATRIX, OUTLET MEANS DISPOSED ADJACENT TO SAID MAGNETIC REGION FOR REMOVAL OF PARTICLES OF LESSER MAGNETIC MOMENT FROM SAID MAGNETIZED MATRIX, SAID PARTICLES OF GREATER MAGNETIC MOMENT BEING HELD AND CONDUCTED WITHIN SAID MAGNETICALLY INDUCED MATRIX PAST SAID MAGNETIC FIELD, MEANS OPERATIVELY DISPOSED FOR SUBSEQUENTLY CONDUCTING A CLEANSING FLUID TO AND FROM SAID MATRIX FOR REMOVING SAID LATTER MAGNETIC PARTICLES THEREFROM BEYOND SAID MAGNETIC REGION, AND MEANS FOR EFFECTING CONTINUOUS ROTATION OF SAID MATRIX IN A DIRECTION PARALLEL OR ANTIPARALLEL TO THE DIRECTION OF FLOW OF SAID MIXTURE SO AS TO PERMIT BETWEEN SAID MIXTURE AND SAID MATRIX A RELATIVE AVERAGE VELOCITY VARIABLE IN MAGNITUDE IN PARALLEL AND ANTIPARALLEL DIRECTIONS DURING A MAJOR PART OF THE TIME THE MIXTURE IS IN THE MAGNETIC FIELD REGION.
Claim 2
Dependent Claim
199 words
APPARATUS FOR SEPARATING MAGNETIC PARTICLES OF GREATER AND LESSER MAGNETIC MOMENT FROM A MIXTURE THEREOF CARRIED IN A FLUID VEHICLE COMPRISING: A SHAPED FIBROUS MATRIX OF MAGNETICALY PERMEABLE MATERIAL, MAGNETIC FIELD MEANS OPERATIVELY DISPOSED TO EFFECT A MAGNETIC FIELD REGION AND THROUGH WHICH FIELD REGION SAID MATRIX MOVES TO EFFECT INDUCED MAGNETIZATION IN A PORTION THEREOF AS SAID MATRIX MOVES THREREPAST, INLET MEANS FOR SAID MIXTURE OPERATIVELY DISPOSED FOR FLOWING SAID MIXTURE THROUGH SAID MATRIX, OUTLET MEANS DISPOSED ADJACENT TO SAID MAGNETIC REGION FOR REMOVAL OF PARTICLES OF LESSER MAGNETIC MOMENT FROM SAID MAGNETIZED MATRIX, SAID PARTICLES OF GREATER MAGNETIC MOMENT BEING HELD AND CONDUCTED WITHIN SAID MAGNETICALLY INDUCED MATRIX PAST SAID MAGNETIC FIELD, MEANS OPERATIVELY DISPOSED FOR SUBSEQUENTLY CONDUCTING A CLEANSING FLUID TO AND FROM SAID MATRIX FOR REMOVING SAID LATTER MAGNETIC PARTICLES THEREFROM BEYOND SAID MAGNETIC REGION, AND MEANS FOR EFFECTING CONTINUOUS ROTATION OF SAID MATRIX IN A DIRECTION PARALLEL OR ANTIPARALLEL TO THE DIRECTION OF FLOW OF SAID MIXTURE SO AS TO PERMIT BETWEEN SAID MIXTURE AND SAID MATRIX A RELATIVE AVERAGE VELOCITY VARIABLE IN MAGNITUDE IN PARALLEL AND ANTIPARALLEL DIRECTIONS DURING A MAJOR PART OF THE TIME THE MIXTURE IS IN THE MAGNETIC FIELD REGION.
Claim 3
Dependent Claim
18 words
Apparatus as set forth in claim 1, said means for effecting continuous rotation being a variable speed motor.
Claim 4
Dependent Claim
34 words
Apparatus as set forth in claim 1, including additional means for conducting a cleansing fluid to and from said matrix for removal of said former magnetic particles within the region of said magnetic field.
Claim 5
Dependent Claim
45 words
Apparatus as set forth in claim 1, said means for effecting continuous rotation being a variable speed motor including additional means for conducting a cleansing fluid to and from said matrix for removal of said former magnetic particles within the region of said magnetic field.
Claim 6
Dependent Claim
16 words
Apparatus as set forth in claim 1, said matrix being in the form of a disc.
Claim 7
Dependent Claim
16 words
Apparatus as set forth in claim 1, said matrix being in the form of a cylinder.
Claim 8
Dependent Claim
17 words
Apparatus as set forth in claim 1, said matrix being in the form of an endless belt.
Claim 9
Dependent Claim
44 words
Apparatus as set forth in claim 1, said means for conducting a cleansing fluid comprising conduit means adjacent said matrix and magnet means adjacent said matrix and encompassing said conduit means thereat for effecting a vibratory magnetic field to loosen particles in said matrix.
Claim 10
Dependent Claim
25 words
Apparatus as set forth in claim 8, said meanS for conducting a cleansing fluid comprising at least one channel extending the width of said cylinder.
Claim 11
Dependent Claim
25 words
Apparatus as set forth in claim 8, said means for conducting a cleansing fluid comprising at least one channel extending the width of said belt.
References Cited (Backward Citations)
US832823A
Cited
US1482607A
Cited
US1462111A
Cited
US2188516A
Cited
US2282510A
Cited
US2459343A
Cited
US2760638A
Cited
US2834470A
Cited
US3326374A
Cited
US3375925A
Cited
US3567026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |