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:
Dec. 20, 2005
Filed:
Nov. 04, 2003
Hideki Ogino, Naka-gun, JP;
Kazuhiko Fujisaku, Naka-gun, JP;
Tadahiro Washiya, Naka-gun, JP;
Japan Nuclear Cycle Development Institute, Ibaraki-ken, JP;
Abstract
A centrifugal extractor of non-contact journaled construction is provided in which, even under the environments of corrosive gase and mist-like liquid such as nitric acid mist generated in the reprocessing of a spent nuclear fuel, no problem in corrosion or deterioration of parts occurs and high reliability is obtained, and operation is enabled for a long period of time free from maintenance. A rotorhoused in a rotor housingis journaled by a main shaftand rotated and driven by a motor. The main shaft is surrounded by a drive-portion housing, and has a thrust magnetic diskon the upper end and radial magnetic disksand a motor-rotor portionin the circumference thereof. Thrust bearing electromagnets, radial bearing electromagnetsand a motor stator portionare incorporated into the drive-portion housing, and covered by non-magnetic anticorrosive protective plates, and a protective pipe, the motor-rotor portion being also covered by a protective can. Slide bearingsfor touch down made of fluorocarbon resin are disposed on the upper end of the main shaft and on the inner wall of the drive-portion housing in the vicinity of the upper end of the rotor.