US3960090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear synchronous motor powered vehicle
Assignee: Hitachi Ltd
•
Filing: 1974-08-02
•
Granted: 1976-06-01
•
Expires: 1994-08-02
Abstract
Abstract The vehicle is powered by a linear synchronous motor, The linear synchronous motor comprises a series of field poles fitted on the vehicle body along its total length and a series of magnetic devices being provided along a track on the ground facing these field poles and developing a travelling magnetic field. A driving force developed between these field poles and the magnetic devices causes the vehicle to move. Such a linear synchronous motor powered vehicle has a problem when securing proper and satisfactory places to mount the necessary equipment of the vehicle. The problem arises from the peculiar construction thereof that a plurality of field poles are disposed along the entire length of the vehicle body. A satisfactory mounting of the apparatus may be attained by a unique arrangement of the field poles, without making the vehicle body large in size or providing discomfort to the passengers.
Inventors
- 👤 Naoki Maki
- 👤 Katsunori Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
B; B60; B60L; B60L13/00; B60L13/03; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/14; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/902; Y10S505/903; Y10S505/905
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
117 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a traveling magnetic field, said magnetic means being provided along a track; a supporting means for supporting a vehicle body on the track, said supporting means being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 2
Dependent Claim
117 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a traveling magnetic field, said magnetic means being provided along a track; a supporting means for supporting a vehicle body on the track, said supporting means being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 3
Dependent Claim
28 words
A linear synchronous motor powering system for vehicles according to claim 1, wherein said interval is disposed symmetrically with respect to the longitudinal center of the vehicle body.
Claim 4
Dependent Claim
24 words
A linear synchronous motor powering system for vehicles according to claim 1, wherein auxiliary equipment is placed in said interval containing no field poles.
Claim 5
Dependent Claim
121 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a traveling magnetic field, said magnetic means being provided along a track; a supporting means for supporting a vehicle body on the track, said supporting means being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said respective intervals being selected to be an integer multiple of said pole pitch.
Claim 6
Dependent Claim
121 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a traveling magnetic field, said magnetic means being provided along a track; a supporting means for supporting a vehicle body on the track, said supporting means being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said respective intervals being selected to be an integer multiple of said pole pitch.
Claim 7
Dependent Claim
26 words
A linear synchronous motor powering system for vehicles according to claim 4, wherein each of said intervals is equal to one half of said pole pitch.
Claim 8
Dependent Claim
54 words
A linear synchronous motor powering system for vehicles according to claim 5, wherein said system further comprises at least one additional interval containing no field poles formed in the alignment of said plurality of field poles along the vehicle body, each said additional interval being equal to an integer multiple of said pole pitch.
Claim 9
Dependent Claim
29 words
A linear synchronous motor powering system for vehicles according to claim 6, wherein said additional interval is disposed symmetrically with respect to the longitudinal center of the vehicle body.
Claim 10
Dependent Claim
23 words
A linear synchronous motor powering system for vehicles according to claim 4, wherein each of said intervals is equal to one pole pitch.
Claim 11
Dependent Claim
54 words
A linear synchronous motor powering system for vehicles according to claim 8, wherein said system further comprises at least one additional interval containing no field poles formed in the alignment of said plurality of field poles along the vehicle body, each said additional interval being equal to an integer multiple of said pole pitch.
Claim 12
Dependent Claim
30 words
A linear synchronous motor powering system for vehicles according to claim 9, wherein each said additional interval is disposed symmetrically with respect to the longitudinal center of the vehicle body.
Claim 13
Dependent Claim
54 words
A linear synchronous motor powering system for vehicles according to claim 4, wherein said system further comprises at least one additional interval containing no field poles formed in the alignment of said plurality of field poles along the vehicle body, each said additional interval being equal to an integer multiple of said pole pitch.
Claim 14
Dependent Claim
118 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling field, said magnetic means being provided along a track; a levitating means for magnetically levitating a vehicle body, said levitating means being provided along the track and at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 15
Dependent Claim
118 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling field, said magnetic means being provided along a track; a levitating means for magnetically levitating a vehicle body, said levitating means being provided along the track and at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 16
Dependent Claim
121 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling field, said magnetic means being provided along a track; a levitating means for magnetically levitating a vehicle body, said levitating means being provided along the track and at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
Claim 17
Dependent Claim
121 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling field, said magnetic means being provided along a track; a levitating means for magnetically levitating a vehicle body, said levitating means being provided along the track and at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
Claim 18
Dependent Claim
130 words
A linear synchronous motor powering system for vehicles comprising: armature coils for developing a travelling magnetic field; stabilizing coils; levitating coils; said armature coils, said stabilizing coils and said levitating coils being provided along a track on the ground; first superconductive field coils magnetically coupled with said levitating coils; second superconductive field coils magnetically coupled with said stabilizing coils and said armature coils; said first and second superconductive field coils being disposed with a predetermined pole pitch along the length of each vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said first and second superconductive field coils along the vehicle body, each said interval containing no field coils and being equal to an integer multiple of said pole pitch.
Claim 19
Dependent Claim
130 words
A linear synchronous motor powering system for vehicles comprising: armature coils for developing a travelling magnetic field; stabilizing coils; levitating coils; said armature coils, said stabilizing coils and said levitating coils being provided along a track on the ground; first superconductive field coils magnetically coupled with said levitating coils; second superconductive field coils magnetically coupled with said stabilizing coils and said armature coils; said first and second superconductive field coils being disposed with a predetermined pole pitch along the length of each vehicle body; and at least one interval along the length of the vehicle body formed in the alignment of said first and second superconductive field coils along the vehicle body, each said interval containing no field coils and being equal to an integer multiple of said pole pitch.
Claim 20
Dependent Claim
133 words
A linear synchronous motor powering system for vehicles comprising: armature coils for developing a travelling magnetic field; stabilizing coils, levitating coils, said armature coils, said stabilizing coils and said levitating coils being provided along a track on the ground; first superconductive field coils magnetically coupled with said levitating coils; second superconductive field coils magnetically coupled with said stabilizing coils and said armature coils; said first and second superconductive field coils being disposed with a predetermined pole pitch along the length of each vehicle body; and an interval containing no field coils formed at each of the opposite ends of the vehicle body in the alignment of said first and second superconductive field coils along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
Claim 21
Dependent Claim
133 words
A linear synchronous motor powering system for vehicles comprising: armature coils for developing a travelling magnetic field; stabilizing coils, levitating coils, said armature coils, said stabilizing coils and said levitating coils being provided along a track on the ground; first superconductive field coils magnetically coupled with said levitating coils; second superconductive field coils magnetically coupled with said stabilizing coils and said armature coils; said first and second superconductive field coils being disposed with a predetermined pole pitch along the length of each vehicle body; and an interval containing no field coils formed at each of the opposite ends of the vehicle body in the alignment of said first and second superconductive field coils along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
Claim 22
Dependent Claim
130 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling magnetic field, said magnetic means being provided along a rail on the ground; wheels for rotatably supporting a vehicle body on the rail, and wheels being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body in a manner that adjacent field poles are each opposite in polarity; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 23
Dependent Claim
130 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling magnetic field, said magnetic means being provided along a rail on the ground; wheels for rotatably supporting a vehicle body on the rail, and wheels being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body in a manner that adjacent field poles are each opposite in polarity; and at least one interval along the length of the vehicle body formed in the alignment of said plurality of field poles along the vehicle body, each said interval containing no field poles and being equal to an integer multiple of said pole pitch.
Claim 24
Dependent Claim
133 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling magnetic field, said magnetic means being provided along a rail on the ground; wheels for rotatably supporting a vehicle body on the rail, said wheels being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body in a manner that adjacent field poles are each opposite in polarity; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
Claim 25
Dependent Claim
133 words
A linear synchronous motor powering system for vehicles comprising: a magnetic means for developing a travelling magnetic field, said magnetic means being provided along a rail on the ground; wheels for rotatably supporting a vehicle body on the rail, said wheels being provided at each vehicle body; a plurality of field poles corresponding to said magnetic means, said field poles being disposed with a predetermined pole pitch along the length of the vehicle body in a manner that adjacent field poles are each opposite in polarity; and an interval containing no field poles formed at each of the opposite ends of the vehicle body in the alignment of said plurality of field poles along the vehicle body, the sum of said intervals being selected to be an integer multiple of said pole pitch.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |