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:
Oct. 23, 2012
Filed:
Jul. 15, 2005
Fusao Nakamura, Tenri, JP;
Osamu Ashida, Hadano, JP;
Kohei Oue, Isehara, JP;
Shimadzu Corporation, Kyoto-Shi, JP;
Abstract
A rotary vacuum pump includes a pump casing on which an intake port flange is formed, a rotor which has a rotating side evacuating device and is driven to rotate at high speed inside the pump casing, and a fixing side evacuating device which is provided inside the pump casing and generates an evacuating effect together with the rotating side evacuating device. The intake port flange is fastened to a device subject to evacuating by a bolt. A through-hole is formed in the intake port flange for inserting the bolt and has a diameter larger than that of the bolt. A gap forming device for forming a gap between the bolt and the through-hole in the intake port flange is provided on a matching surface of the through-hole.