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:
Feb. 18, 2003
Filed:
Oct. 17, 2000
Applicant:
Inventors:
Masakazu Yamamoto, Tokyo, JP;
Yoshio Miyake, Tokyo, JP;
Junya Kawabata, Tokyo, JP;
Keita Uwai, Tokyo, JP;
Yoshiaki Miyazaki, Tokyo, JP;
Katsuji Iijima, Tokyo, JP;
Makoto Kobayashi, Tokyo, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 4/906 ;
U.S. Cl.
CPC ...
F04B 4/906 ;
Abstract
An apparatus for controlling performance of a fluid machinery by controlling rotational speed of the fluid machinery. A performance regulating device for the fluid machinery includes a frequency converter, a casing for housing the frequency converter so as to ensure being airtight against an atmosphere, an input, and an output connected to the casing so as to ensure being airtight against the atmosphere.