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:
Nov. 09, 1999
Filed:
Sep. 18, 1996
David B Clifton, Leander, TX (US);
Joseph F Pinkerton, Austin, TX (US);
Magnetic Bearing Technologies, Inc., Austin, TX (US);
Abstract
A magnetically levitated transport device provides levitation and propulsion of a vacuum carriage. An air carriage is moved by conventional means through both linear and angular displacements. Non-magnetic coils mounted on the air carriage interact with permanent magnets mounted on the vacuum carriage to magnetically link the carriages together using Lorentz forces. The non-magnetic coils, which are exposed to the fields generated by the permanent magnets, produce the Lorentz forces when driven by drive currents in response to inputs received from position sensors. In one embodiment, power requirements are reduced by adding permanent magnets to the air carriage that interact with some of the permanent magnets on the vacuum carriage to provide forces that substantially levitate all of the static load.