Patents by Inventor Hoechun KIM

Hoechun KIM has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220290675
    Abstract: The present invention relates to a pump apparatus for delivering a liquid. The pump apparatus includes a pump (1) having an impeller (5), an electric motor (7) for rotating the impeller (5), and an inverter (10) for driving the electric motor (7) at variable speed. The impeller (5) has a non-limit load characteristic in a predetermined discharge flow-rate range (R). The inverter (10) is configured to drive the electric motor (7) 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.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 15, 2022
    Applicant: Ebara Corporation
    Inventors: Hiroyuki KAWASAKI, Takayuki MIYAMOTO, Miwa HIDEKURA, Hoechun KIM, Satoshi YAMAZAKI, Xinshuai FAN