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:
Jul. 14, 1998
Filed:
May. 22, 1996
Junichiro Onigata, Atsugi, JP;
Kazuyoshi Kushihara, Atsugi, JP;
Unisia Jecs Corporation, Atsugi, JP;
Abstract
A centrifugal pump comprises a hollow pump body. An impeller is rotatably installed in a pump chamber defined in the pump body. The impeller has a front side facing a major part of the pump chamber and a rear side facing a bottom wall of the pump chamber. The hollow pump body has both a water discharge passage and a water discharge port formed therein. A water guide ridge is positioned between the pump chamber and the water discharge passage to smooth a water flow from the pump chamber toward the water discharge port. The water guide ridge extends upstream in the water discharge passage and projects from the inner wall toward the major part of the pump chamber. The water guide ridge has an upstream end portion sloped. With this sloped upstream end portion, undesired cavitation in the pump is suppressed or at least minimized.