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:
Sep. 14, 1993
Filed:
Jun. 07, 1991
Masami Ninomiya, Tokyo, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic levitation actuator includes a pair of U-shaped first permanent magnets provided on opposite sides of an object to be driven with a pair of outwardly projecting first legs defining the U-shape. A pair of guide rails are spaced apart from the object on opposite sides thereof, and a pair of U-shaped second permanent magnets are provided on associated guide rails and extend along the guide rails. Each of the second permanent magnets is provided with a second pair of legs defining the U-shape of the associated second magnets and opposed to the associated first legs of the first magnets with a predetermined gap therebetween. The first legs and second legs, which are opposed to each other, have opposite polarities to produce a magnetic attraction therebetween.