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:
Mar. 22, 2011
Filed:
Oct. 18, 2005
Turbo machine, compressor impeller used for turbo machine, and method of manufacturing turbo machine
Toshihiko Nishiyama, Oyama, JP;
Keiichi Inaba, Oyama, JP;
Tetsuaki Ogawa, Oyama, JP;
Hiroshi Sugito, Oyama, JP;
Takahisa Iino, Oyama, JP;
Toshihiko Nishiyama, Oyama, JP;
Keiichi Inaba, Oyama, JP;
Tetsuaki Ogawa, Oyama, JP;
Hiroshi Sugito, Oyama, JP;
Takahisa Iino, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A turbocharger as a turbo machine includes: a compressor impeller () having a projected portion () at a center of a rear surface; a drive shaft () connected to a bottomed coupling hole () provided in the projected portion () of the compressor impeller () through interference fit only; and a sleeve () with a cylindrical portion () connected to the outer peripheral portion of the projected portion () of the compressor impeller () by fitting only. The sleeve () is formed of a material whose coefficient of linear expansion is smaller than that of the compressor impeller (). Accordingly, even when the coupling hole () in the projected portion () undergoes thermal expansion and the diameter of the coupling hole () increases, a connection between the drive shaft () and the coupling hole () can be prevented from being loosened since the radial increase thereof is suppressed by the cylindrical portion (). Thus, the state of the connection thereof can be well maintained.