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:
Jan. 01, 2008
Filed:
Sep. 07, 2006
Akihiro Shimada, Tokyo, JP;
Akihiro Shimada, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In order to obtain a magnetic bearing apparatus in which a large cooling effect is exerted by a simple configuration, finswhich form an air flow in a rearward direction are disposed in a rear portion and outer diameter of a rotary shaft, a generatorwhich converts an air flow produced by rotation of the finsto a compressed vortex flow, and which has an axial through hole is fixed with being separated from the finsby an appropriate gap, and a tubein which the inner diameter is larger than the diameter of the through holeof the generator, and which has a control valveat the rear end is provided in rear of the generator. Cooling wind is produced by a driving force of the rotary shaft. Cooling wind flow pathsthrough which the cooling wind is to be passed, and which axially elongate are formed in the rotary shaft