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. 21, 2018
Filed:
Jan. 14, 2014
Ebara Corporation, Tokyo, JP;
Masahito Kawai, Tokyo, JP;
Hiromi Sakacho, Tokyo, JP;
Masashi Obuchi, Tokyo, JP;
Hiroshi Uchida, Tokyo, JP;
Miho Isono, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
The present invention relates to a volute pump and particularly provides a volute pump for delivering a liquid containing fibrous substances and solid substances, while preventing these substances from obstructing the pump. The volute pump includes a pump casing () having a protrusion () projecting into a flow passage () and separating a starting end of a volute from a terminal end of a volute. The protrusion () faces a liquid outlet () of an impeller (). A radius of curvature (Rb) of a cross section of a distal edge of the protrusion () at its one side end () is larger than a radius of curvature (Ra) of the cross section of the distal edge of the protrusion () at other side end (). The other side end () faces a main plate (), while the one side end () is located opposite to the main plate ().