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:
Sep. 07, 1999
Filed:
Mar. 27, 1997
Applicant:
Inventors:
Hiroyuki Kato, Yokohama, JP;
Shuichiro Honda, Kawasaki, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415220 ; 415200 ; 415143 ; 29447 ;
Abstract
A turbomachinery includes an attachment structure of an impeller to a rotational shaft which does not incur looseness even when it is subjected to temperature cycles, and which can be obtained without increasing manufacturing costs. The rotational shaft has the impeller at an end portion thereof. A cylindrical member is provided concentrically of the rotational shaft at the end portion for holding the impeller. The impeller is fitted inside the cylindrical member by shrink fitting.