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. 17, 2020
Filed:
Mar. 24, 2016
Ebara Corporation, Tokyo, JP;
Masahito Kawai, Tokyo, JP;
Hiromi Sakacho, Tokyo, JP;
Masashi Obuchi, Tokyo, JP;
Hiroshi Uchida, Tokyo, JP;
Miho Isono, Tokyo, JP;
Kenta Tokairin, Tokyo, JP;
EBARA CORPORATION, Tokyo, JP;
Abstract
A volute pump for delivering a liquid containing fibrous substances. The volute pump includes an impeller () rotatable together with a rotational shaft (), and an impeller casing () having a suction port () and a volute chamber (). A groove (), extending from the suction port () to the volute chamber (), is formed in an inner surface of the impeller casing (). The impeller () includes a hub () to which the rotational shaft () is fixed, and a sweep-back vane () extending helically from the hub (). The sweep-back vane () includes a leading edge portion () extending helically from the hub (), and a trailing edge portion () extending helically from the leading edge portion (). The leading edge portion () has a front-side curved surface () extending from an inner end () to an outer end () of the leading edge portion ().