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:
Aug. 10, 2004
Filed:
Mar. 20, 2002
Applicant:
Inventors:
Toshio Itou, Tsuchiura, JP;
Kazuo Takeda, Chiyoda, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 1/704 ; F01D 1/708 ;
U.S. Cl.
CPC ...
F01D 1/704 ; F01D 1/708 ;
Abstract
In a compressor system, in which plural numbers of compressors are connected in parallel with, wherein flow rate of all the compressor main bodies driven under load operating condition is decreased down by closing each of the inlet guide vanes thereof, when a load of the compressor goes down, and then the compressor rushing into surge at the earliest is brought into unload operating condition. Thereafter, the flow rates of the compressors other than that brought into the un-load operating conditions are increased up, thereby conducting the operation of the compressor depending upon the load.