U.S. patents available from 1976 to present.
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Levitation-propulsion mechanism for inductive repulsion type magnetically levitated railway

Patent 4779538 Issued on October 25, 1988. Estimated Expiration Date: Icon_subject December 16, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3470828

3820470

3858522

Inventors

Application

No. 07/133906 filed on 12/16/1987

US Classes:

104/282, Propulsion means employed to suspend car104/286, Construction or composition of suspension elements104/292, Propulsion by active guideway; e.g., linear synchronous motor, etc.104/294Construction or composition of motor elements

Examiners

Primary: Reeves, Robert B.
Assistant: Pape, Joseph D.

Attorney, Agent or Firm

International Classes

B60L 13/00 (20060101)
B60L 13/10 (20060101)

Foreign Application Priority Data

1986-12-26 JP

Abstract

A levitation-propulsion mechanism for an inductive repulsion type magnetically levitated railway having a vehicle with a truck and a track with a U-shaped cross-section with spaced opposed walls between which the truck runs, has a plurality of vertically positioned superconducting coils on both sides of the truck at intervals therealong in the direction of travel of the vehicle. Guidance coils are mounted on the inside surfaces of the walls of the track at intervals therealong in the direction of travel of the vehicle and opposed to the corresponding superconducting coils. Upper and lower levitation coils are positioned adjacent to the guidance conductor coils and opposed to the superconducting coils, the upper and lower coils being symmetrically positioned above and below, respectively, a horizontal line through the center of the guidance coils, and the upper and lower conductor coils are null-flux connected in a closed circuit. The guidance coils can be connected to a propulsion power source, in which case they become propulsion-guidance coils. Alternatively the levitation coils can be connected to the propulsion power source, in which case they become levitation-propulsion coils.

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