Patent US4326869A successfully refreshed from Google Patents.
US3850108A
Expired / Lapsed
US
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Armature assembly and magnetically suspended vehicle
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1973-01-16
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Granted: 1974-11-26
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Expires: 1993-01-16
Abstract
Abstract A magnetically suspended vehicle driven by a linear induction motor has an armature carried by the track and juxtaposed with the suspension and/guidance electromagnet which is provided with a rail of high electrical conductivity serving as a reaction rail for a one-sided linear induction motor. This armature rail is of U-profile and the electrically conductive rail is applied along the inner or outer surface of one of the lateral shanks or the web interconnecting the shanks, the rail being of laminated construction to reduce eddy currents therein.
Inventors
- 👤 G Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:37
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B60; B60L; B60L13/00; B60L13/10; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A suspension and drive system for an electromagnetically suspended and guided vehicle, the system comprising a track, a magnetically permeable rail extending along said track, a vehicle adapted to travel along said track, a first electromagnetic means on said vehicle confronting said rail and juxtaposed therewith for producing a first closed magnetic field therethrough for susPending and guiding said vehicle relative to said track, a continuous high-conductivity reaction layer formed longitudinally directly on said rail and integral therewith while having an electrical conductivity in excess of that of the body of the rail, and a one-sided linear induction motor forming second electromagnetic means carried by said vehicle independently of said first electromagnetic means and interacting with said layer for propelling said vehicle along said track.
Claim 2
Dependent Claim
125 words
A suspension and drive system for an electromagnetically suspended and guided vehicle, the system comprising a track, a magnetically permeable rail extending along said track, a vehicle adapted to travel along said track, a first electromagnetic means on said vehicle confronting said rail and juxtaposed therewith for producing a first closed magnetic field therethrough for susPending and guiding said vehicle relative to said track, a continuous high-conductivity reaction layer formed longitudinally directly on said rail and integral therewith while having an electrical conductivity in excess of that of the body of the rail, and a one-sided linear induction motor forming second electromagnetic means carried by said vehicle independently of said first electromagnetic means and interacting with said layer for propelling said vehicle along said track.
Claim 3
Dependent Claim
38 words
The system defined in claim 1 wherein said rail is of U-profile and comprises a web portion and a pair of parallel shank portions having inner and outer surfaces, said layer being formed on one of said surfaces.
Claim 4
Dependent Claim
28 words
The system defined in claim 2 wherein said layer is formed on one of said inner surfaces and said motor is received in part between said shank portions.
Claim 5
Dependent Claim
23 words
The system defined in claim 2 wherein at least, the portion of said rail carrying said layer is laminated of soft magnetic sheet.
Claim 6
Dependent Claim
14 words
The system defined in claim 4 wherein said sheets are parallel to said layer.
Claim 7
Dependent Claim
14 words
The system defined in claim 4 wherein said sheets are perpendicular to said layer.
Claim 8
Dependent Claim
26 words
The system defined in claim 2 wherein said layer is composed of aluminum and is formed on an outer surface on one of said shank portions.
Claim 9
Dependent Claim
22 words
The system defined in claim 2 wherein said layer is aluminum and is formed on an outer surface of said web portion.
Claim 10
Dependent Claim
22 words
The system defined in claim 2 wherein said layer is aluminum and is formed on the inner surface of said web portion.
Claim 11
Dependent Claim
58 words
The system defined in claim 2 wherein said track is horizontal and is provided with a respective such rail along opposite horizontally spaced edges thereof, said vehicle having a pair of aprons flanking said edges and each carrying a respective electromagnet and linear induction motor juxtaposed with the respective rail, said electromagnets suspending said vehicle from said rails.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |