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:
Dec. 05, 2023
Filed:
Jun. 10, 2020
Ebara Corporation, Tokyo, JP;
Hiroyuki Kawasaki, Tokyo, JP;
Takayuki Miyamoto, Tokyo, JP;
Miwa Hidekura, Tokyo, JP;
Hoechun Kim, Tokyo, JP;
Satoshi Yamazaki, Tokyo, JP;
Xinshuai Fan, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
The present invention relates to a pump apparatus for delivering a liquid. The pump apparatus includes a pump () having an impeller (), an electric motor () for rotating the impeller (), and an inverter () for driving the electric motor () at variable speed. The impeller () has a non-limit load characteristic in a predetermined discharge flow-rate range (R). The inverter () is configured to drive the electric motor () at a preset target operating point (TO) with a rotation speed higher than a rotation speed corresponding to a power frequency of a commercial power source.