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:
Jun. 11, 2013
Filed:
Jun. 04, 2008
Applicant:
Takuto Onishi, Kyoto, JP;
Inventor:
Takuto Onishi, Kyoto, JP;
Assignee:
Shimadzu Corporation, Kyoto-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 19/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A turbo-molecular pump, includes a blade pumping section having a plurality of rotor blades and a plurality of stator blades which are alternately arranged in plural stages along an axial direction of the pump, and a thread groove pumping section having a cylindrical-shaped screw stator, and a rotor cylinder adapted to be rotated inside the screw stator. The rotor cylinder has a lower edge surface located on an upstream side relative to a downstream edge of the screw stator with respect to the axial direction. The turbo-molecular pump of the present invention can minimize flying-out of broken pieces of the rotor cylinder from a discharge port.