US4299173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Levitation and guide mechanism for curved track in inductive repulsion type vehicle magnetic levitation and guide system
Assignee: Japan National Railways
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Filing: 1979-11-14
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Granted: 1981-11-10
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Expires: 1999-11-14
Abstract
Abstract An improvement in an inductive repulsion type vehicle magnetic levitation and guide system for a curved track in which the vehicle is levitated by an electromagnetic force generated between levitation conductors having the same time constant and laid in two parallel rows on the ground at specific intervals in the direction of travel of the vehicle and levitation superconductive magnets on the vehicle capable of being electromagnetically coupled with the levitation conductors, the magnets being opposed to the levitation conductors at a specific distance from the levitation conductors. The vehicle is guided by an electromagnetic force generated between guide conductors having the same time constant successively positioned at specific intervals in the direction of travel of the vehicle and guide superconductive magnets mounted on the vehicle opposed to the guide conductors at a specific distance from the guide conductors. The electromagnetic force generated between the levitation superconductive magnets and the levitation conductors or between the guide superconductive magnet and the guide conductor on one side of a curved track is made larger than the similar force generated on the other side of the curved tracks, and the differential force counteracts the centrifugal force acting on the vehicle running over the curved track, thus stabilizing the vehicle running at high speed along the curved track.
Inventors
- 👤 Kazutaka Arima
- 👤 Yoshiyuki Kitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:31
CPC Classifications
B; B61; B61B; B61B13/00; B61B13/08; B60; B60L; B60L13/00; B60L13/04; B60L2200/00; B60L2200/26; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/902; Y10S505/903; Y10S505/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
211 words
An inductive repulsion type magnetic vehicle levitation and guide system, comprising: two parallel rows of levitation conductors having a predetermined time constant with said conductors being at specific intervals along a track in the direction of travel of the vehicle; levitation superconductive magnets mounted on the vehicle in spaced opposed relation to said conductors and electromagnetically coupled with said conductors for levitating the vehicle by the electromagnetic force developed between said conductors and said magnets; guide means extending along the track in the direction of travel of the vehicle; guide conductors having a predetermined time constant and positioned in parallel on said guide means in the direction of travel of the vehicle; corresponding guide superconductive magnets mounted on the vehicle in spaced opposed relation to said guide conductors, said levitation magnets and levitation conductors and guide magnets and the guide conductors along a curved portion of the track being electromagnetically related for producing an electromagnetic repulsive force between at least one magnet and one conductor which is different from the electromagnetic repulsive force between the corresponding magnets and the corresponding conductors on the straight portion of the track and which is in a direction for counteracting the centrifugal force acting on the vehicle passing through the curved portion of the track.
Claim 2
Dependent Claim
211 words
An inductive repulsion type magnetic vehicle levitation and guide system, comprising: two parallel rows of levitation conductors having a predetermined time constant with said conductors being at specific intervals along a track in the direction of travel of the vehicle; levitation superconductive magnets mounted on the vehicle in spaced opposed relation to said conductors and electromagnetically coupled with said conductors for levitating the vehicle by the electromagnetic force developed between said conductors and said magnets; guide means extending along the track in the direction of travel of the vehicle; guide conductors having a predetermined time constant and positioned in parallel on said guide means in the direction of travel of the vehicle; corresponding guide superconductive magnets mounted on the vehicle in spaced opposed relation to said guide conductors, said levitation magnets and levitation conductors and guide magnets and the guide conductors along a curved portion of the track being electromagnetically related for producing an electromagnetic repulsive force between at least one magnet and one conductor which is different from the electromagnetic repulsive force between the corresponding magnets and the corresponding conductors on the straight portion of the track and which is in a direction for counteracting the centrifugal force acting on the vehicle passing through the curved portion of the track.
Claim 3
Dependent Claim
32 words
A system as claimed in claim 1 in which said one conductor has a larger time constant than the time constant of the corresponding conductors on the straight portion of the track.
Claim 4
Dependent Claim
61 words
A system as claimed in claim 2 in which said guide means is a center guide extending along the central axis of the track, and said guide conductors are on the inside and outside surfaces of said center guide, the guide conductors on the inside of said center guide along the curved portion of the track having the larger time constant.
Claim 5
Dependent Claim
98 words
A system as claimed in claim 2 in which said guide means is a center guide extending along the central axis of the track, and said guide conductors are on the inside and the outside surfaces of said center guide, the guide conductors on the inside of said center guide along the curved portion of the track having the larger time constant, and the levitation conductors being positioned on both sides of said center guide and the levitation conductors on the outside of said center guide along the curved portion of the track having the larger time constant.
Claim 6
Dependent Claim
62 words
A system as claimed in claim 2 in which said guide means is a channel means extending along the track with opposed walls facing each other, and said guide conductors are on the opposed walls of said channel means, the guide conductors on the outside wall of the channel means along the curved portion of the track having the larger time constant.
Claim 7
Dependent Claim
98 words
A system as claimed in claim 2 in which said guide means is a channel means extending along the track with opposed walls facing each other, and said guide conductors are on the opposed walls of said channel means, the guide conductors on the outside wall of the channel means along the curved portion of the track having the larger time constant, and the levitation conductors being positioned on the bottom of the channel means and the levitation conductors toward the outside of the channel means along the curved portion of the track having the larger time constant.
Claim 8
Dependent Claim
39 words
A system as claimed in claim 1 in which said one conductor is the levitation conductor along the inside of the curve of the curved portion of the track, and is laterally offset from the opposed levitation superconductive magnet.
Claim 9
Dependent Claim
58 words
A system as claimed in claim 1 in which said one conductor has a larger time constant than the time constant of the corresponding conductors on the straight portion of the track and one levitation conductor along the inside of the curve of the curved portion of the track is laterally offset from the opposed levitation superconductive magnet.
Claim 10
Dependent Claim
87 words
A system as claimed in claim 8 in which said guide means is a center guide extending along the central axis of the track, and said guide conductors are on the inside and outside surfaces of said center guide, the guide conductors on the inside of said center guide along the curved portion of the track having the larger time constant, and the levitation conductor along the inside of the curve of the curved portion of the track is laterally offset from the opposed levitation superconductive magnet.
Claim 11
Dependent Claim
88 words
A system as claimed in claim 8 in which said guide means is a channel means extending along the track with opposed walls facing each other and said guide conductors are on the opposed walls of said channel means, the guide conductors on the outside wall of the channel means along the curved portion of the track having the larger time constant, and the levitation conductor along the inside of the curve of the curved portion of the track being laterally offset from the opposed levitation superconductive magnet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |