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. 26, 2013
Filed:
Mar. 31, 2008
Applicant:
Toshiki Yamaguchi, Nagaokakyou, JP;
Inventor:
Toshiki Yamaguchi, Nagaokakyou, JP;
Assignee:
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 35/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A turbo-molecular pump includes a base; a rotorrotatably supported thereon; a statordisposed around the rotor; and a tubular casingconfigured to accommodate the stator. The statorincludes multiple stages of stator bladesand spacersalternately stacked one upon another on a flange surfaceof the base. At least one of the spacersis provided with a circular ring partcontinuously formed thereof covering the outer circumferential surface of other spacersinside the casing