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:
Jan. 19, 2016
Filed:
Dec. 22, 2010
Yoshiaki Miyazaki, Tokyo, JP;
Ritsuko Miyazaki, Tokyo, JP;
Junya Kawabata, Tokyo, JP;
Hiromi Sakacho, Tokyo, JP;
Masashi Obuchi, Tokyo, JP;
Yoichi Nakamura, Tokyo, JP;
Yoshiaki Miyazaki, Tokyo, JP;
Junya Kawabata, Tokyo, JP;
Hiromi Sakacho, Tokyo, JP;
Masashi Obuchi, Tokyo, JP;
Yoichi Nakamura, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
A non-clogging type pump impeller includes: a fluid passage provided in an approximately cylindrical body and connecting a suction port to a discharge port. The fluid passage has a vortex shape as viewed from an axial direction. A first recess, which is sunk downwardly in the axial direction, is formed on a first end surface of the approximately cylindrical body so as to surround a boss. A second recess, which is sunk upwardly in the axial direction, is formed on a second end surface of the approximately cylindrical body so as to surround the suction port. At least one communication hole provides fluid communication between the first recess and the second recess. Sewage in the second recess is introduced into the first recess through the at least one communication hole to thereby effectively remove an air pocket trapped on the first end surface of the impeller and in the first recess.