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. 24, 2005
Filed:
Aug. 19, 2002
Applicant:
Yuuji Yada, Iwata, JP;
Inventor:
Yuuji Yada, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S002/22 ;
U.S. Cl.
CPC ...
Abstract
In a gas circulation fan, a main shaft is supported in a non-contact manner, by magnetic bearings. Between each of the magnetic bearings and a controller, a relay is provided. Each relay includes a position detection sensor circuit, an offset adjuster, a feedback gain adjuster and a filter circuit. Thus, compatibility between a mechanical body unit and the controller is attained.