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:
Nov. 13, 1990
Filed:
Feb. 01, 1989
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415157 ; 415 48 ; 415150 ;
Abstract
In a diffuser for a centrifugal compressor of the type which includes an impeller rotatably provide on a downstream side of the suction casing and a plurality of radial stator blades arranged tangentially with respect to the impeller, auxiliary blades are provided between the impeller and the stator blades, with the auxiliary blades having a chord length shorter than that of the stator blades and being slidable in the axial direction of the impeller. Further, the auxiliary blades are connected to devices designed to move them in the axial direction.