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. 10, 2002
Filed:
Mar. 12, 2001
Hidefumi Nakao, Kiyose, JP;
Ishikawajima-Harima Jukogyo Kabushiki Kaisha, Tokyo-to, JP;
Abstract
In a centrifugal compressor, a housing is provided which has an annular treatment cavity in a shroud wall. The shroud wall has a first opening providing communication between an installed zone of an impeller and the treatment cavity, and a second opening providing communication between the treatment cavity and a zone upstream of the first opening so as to circulate air a during a low-flow-rate operation. Louvers are arranged in the second opening in circumferentially equidistantly spaced apart relationship with each other and inclined reversely to a rotative direction of the impeller so that the air a sucked to the treatment cavity is, when discharged through the second opening, subjected to directional flow guide action with a whirling direction reverse to the rotative direction of the impeller.