US5168183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Levitation system with permanent magnets and coils
Assignee: Levitation Arts Inc
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Filing: 1991-03-27
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Granted: 1992-12-01
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Expires: 2011-03-27
Abstract
Abstract A levitation system for levitating a levitated magnetic element in a stable suspended position on one side of a separating plane using a magnetic arrangement on the opposite side of the separating plane. The magnetic arrangement provides a preselected static magnetic field configuration that interacts with a magnet in the levitated element so that the magnetic potential energy of this interaction increases for displacements of the element from its stable position in directions parallel to a stability plane and decreases for displacements of the element from the stable position perpendicular to the stability plane. Any movement perpendicular to the stability plane is sensed and used by a feedback control system to control a force applied to the levitated element to stabilize the element against displacement from the stable position in directions perpendicular to the stability plane.
Inventors
- 👤 Lorne A. R. Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:17
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; H; H02; H02N; H02N15/00
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
206 words
A levitating system comprising a levitating device positioned on one side of a separating plane for maintaining a levitated element at a substantially stable position on the side of said separating plane remote from said one side and wherein said levitated element includes magnetic means defining a magnetic region, and said levitating device comprises a static magnetic means producing a preselected static magnetic field configuration such that said levitated element is levitated by said magnetic field configuration interacting with said magnetic region to cause magnetic potential energy of said interaction to increase for substantially all displacements of said levitated element from said stable position in directions parallel to a preselected stability plane and said magnetic potential energy to decrease for any displacement of said levitated element from said stable position in a direction perpendicular to said stability plane, a sensor means generating a signal dependent on displacement of said levitated element in said direction perpendicular to said stability plane, a non contacting controllable force means and a feedback control means, said feedback control means receiving said signal from said sensor means and controlling said controllable force means to stabilize said levitated element against displacement from said stable position in said direction perpendicular to said stability plane.
Claim 2
Dependent Claim
206 words
A levitating system comprising a levitating device positioned on one side of a separating plane for maintaining a levitated element at a substantially stable position on the side of said separating plane remote from said one side and wherein said levitated element includes magnetic means defining a magnetic region, and said levitating device comprises a static magnetic means producing a preselected static magnetic field configuration such that said levitated element is levitated by said magnetic field configuration interacting with said magnetic region to cause magnetic potential energy of said interaction to increase for substantially all displacements of said levitated element from said stable position in directions parallel to a preselected stability plane and said magnetic potential energy to decrease for any displacement of said levitated element from said stable position in a direction perpendicular to said stability plane, a sensor means generating a signal dependent on displacement of said levitated element in said direction perpendicular to said stability plane, a non contacting controllable force means and a feedback control means, said feedback control means receiving said signal from said sensor means and controlling said controllable force means to stabilize said levitated element against displacement from said stable position in said direction perpendicular to said stability plane.
Claim 3
Dependent Claim
71 words
A levitating system as defined in claim 1 wherein said static magnetic means comprises a first magnetic means which stabilizes said levitated element against displacement from said stable position parallel to a first direction within said stability plane and a second magnetic means which stabilizes said levitated element against displacements parallel to a second direction within said stability plane and wherein said second direction is substantially perpendicular to said first direction.
Claim 4
Dependent Claim
61 words
A levitating system as defined in claim 1 wherein said magnetic means forming said magnetic region is formed by at least one magnet having a polarization substantially parallel to a preselected magnetic direction and wherein said magnetic region has a maximum dimension which is significantly less than the minimum distance between said at least one magnet and said static magnetic means.
Claim 5
Dependent Claim
34 words
A levitating system as defined in claim 1 wherein said stability plane is substantially parallel to a straight line between the center of said static magnetic means and the center of said magnetic region.
Claim 6
Dependent Claim
71 words
A levitating system as defined in claim 3 wherein said static magnetic means comprises a first magnetic means which stabilizes said levitated element against displacement from said stable position parallel to a first direction within said stability plane and a second magnetic means which stabilizes said levitated element against displacements parallel to a second direction within said stability plane and wherein said second direction is substantially perpendicular to said first direction.
Claim 7
Dependent Claim
71 words
A levitating system as defined in claim 4 wherein said static magnetic means comprises a first magnetic means which stabilizes said levitated element against displacement from said stable position parallel to a first direction within said stability plane and a second magnetic means which stabilizes said levitated element against displacements parallel to a second direction within said stability plane and wherein said second direction is substantially perpendicular to said first direction.
Claim 8
Dependent Claim
61 words
A levitating system as defined in claim 4 wherein said magnetic means forming said magnetic region is formed by at least one magnet having a polarization substantially parallel to a preselected magnetic direction and wherein said magnetic region has a maximum dimension which is significantly less than the minimum distance between said at least one magnet and said static magnetic means.
Claim 9
Dependent Claim
34 words
A levitating system as defined in claim 5 wherein said stability plane is substantially parallel to a straight line between the center of said static magnetic means and the center of said magnetic region.
Claim 10
Dependent Claim
70 words
A levitating system as defined in claim 2 wherein said first magnetic means comprises a pair of spaced bar magnets with their poles facing in a direction parallel to a straight line from the center of said pair of magnets to the center of said magnetic region of said levitated element and wherein said first magnetic means and said magnetic element have their opposite magnetic poles adjacent to each other.
Claim 11
Dependent Claim
70 words
A levitating system as defined in claim 6 wherein said first magnetic means comprises a pair of spaced bar magnets with their poles facing in a direction parallel to a straight line from the center of said pair of magnets to the center of said magnetic region of said levitated element and wherein said first magnetic means and said magnetic element have their opposite magnetic poles adjacent to each other.
Claim 12
Dependent Claim
68 words
A levitating system as defined in claim 8 wherein said first magnetic means comprises a pair of spaced bar magnets with their poles facing in a direction parallel to a straight line from the center of said magnets to the center of said magnetic region of said levitated element and wherein said first magnetic means and said magnetic element have their opposite magnetic poles adjacent to each other.
Claim 13
Dependent Claim
37 words
A levitating system as defined in claim 2 wherein said second magnetic means comprises a second pair of spaced bar magnets with poles facing substantially in the opposite direction as said poles of said first magnetic means.
Claim 14
Dependent Claim
37 words
A levitating system as defined in claim 10 wherein said second magnetic means comprises a second pair of spaced bar magnets with poles facing substantially in the opposite direction as said poles of said first magnetic means.
Claim 15
Dependent Claim
37 words
A levitating system as defined in claim 11 wherein said second magnetic means comprises a second pair of spaced bar magnets with poles facing substantially in the opposite direction as said poles of said first magnetic means.
Claim 16
Dependent Claim
88 words
A levitating system as defined in claim 2 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field, said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 17
Dependent Claim
88 words
A levitating system as defined in claim 4 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 18
Dependent Claim
88 words
A levitating system as defined in claim 6 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 19
Dependent Claim
88 words
A levitating system as defined in claim 7 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 20
Dependent Claim
88 words
A levitating system as defined in claim 8 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 21
Dependent Claim
88 words
A levitating system as defined in claim 9 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 22
Dependent Claim
88 words
A levitating system as defined in claim 10 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 23
Dependent Claim
88 words
A levitating system as defined in claim 11 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 24
Dependent Claim
88 words
A levitating system as defined in claim 12 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 25
Dependent Claim
88 words
A levitating system as defined in claim 13 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 26
Dependent Claim
88 words
A levitating system as defined in claim 14 wherein said controllable force means comprises an electromagnet formed by two coil sections arranged with a gap therebetween, said gap being symmetrically positioned relative to said stability plane, said gap providing a leakage magnetic field, said leakage magnetic field from said gap having a polarity opposite to the polarity of the magnetic field created by said electromagnet in the region surrounding said electromagnet and wherein said leakage field and said surrounding field substantially cancel each other at said stable position.
Claim 27
Dependent Claim
54 words
A levitating system as defined in claim in claim 1 wherein said static magnetic means comprises a main magnet having an annular groove formed in a face thereof facing said levitated element and wherein said main magnet and said magnetic means of said levitated element have their opposite magnetic poles adjacent to each other.
Claim 28
Dependent Claim
54 words
A levitating system as defined in claim in claim 3 wherein said static magnetic means comprises a main magnet having an annular groove formed in a face thereof facing said levitated element and wherein said main magnet and said magnetic means of said levitated element have their opposite magnetic poles adjacent to each other.
Claim 29
Dependent Claim
25 words
A levitating system as defined in claim 26 wherein said controllable force means comprises an electromagnet substantially positioned in and extending around said annular groove.
Claim 30
Dependent Claim
25 words
A levitating system as defined in claim 27 wherein said controllable force means comprises an electromagnet substantially positioned in and extending around said annular groove.
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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) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-01 | 2004-06-01 | 2004-12-01 | $7700.00 | Window Closed / Lapsed |