The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1993
Filed:
Jan. 17, 1992
Michael Proise, Garden City, NY (US);
Grumman Aerospace Corporation, Bethpage, NY (US);
Abstract
A magnetically levitated vehicle adapted for movement along a guideway, comprising a passenger compartment, at least first and second primary magnets and a plurality of confining magnets. The first and second primary magnets are secured on the vehicle to produce a magnetic field having a magnetic flux density extending outward from the primary magnets, to support the vehicle spaced from and to move the vehicle along the guideway. The plurality of confining magnets are disposed on the vehicle to confine the magnetic flux extending outward from the primary magnets and to reduce the strength of the primary magnetic field in the passenger compartment. Preferably, the confining magnets maintain the strength of the magnetic field in the passenger compartment below 5 gauss; and even more preferably, those magnets are used to maintain the strength of the primary magnetic field in the passenger compartment below 1 gauss. The confining magnets attenuate both the dc and ac fields in the passenger compartment, and also actually improve the concentration of magnetic flux available for levitation.