Patents by Inventor Kwan-Seek KIM

Kwan-Seek 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).

  • Apparatus and method of measuring coil current of hydraulic valve
    Patent number: 9951883
    Abstract: Disclosed herein are an apparatus and method of measuring a coil current of a hydraulic valve. The apparatus includes a first coil current measurement unit configured to receive a first coil current control signal from a coil current control device during an ON operating section of the hydraulic valve in operating sections of the hydraulic valve operated by receiving power of a battery, and measure a first coil current value flowing through a coil of the hydraulic valve using a first switching element to be switched ON, and a second coil current measurement unit configured to receive a second coil current control signal from the coil current control device during an OFF operating section of the hydraulic valve in the operating sections of the hydraulic valve operated by receiving power of the battery, and measure a second coil current value flowing through the coil of the hydraulic valve using a second switching element to be switched ON.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: April 24, 2018
    Assignee: MANDO CORPORATION
    Inventors: Jung-Wook Seo, Kwan-Seek Kim, Chang-Woo Lee
  • APPARATUS AND METHOD OF MEASURING COIL CURRENT OF HYDRAULIC VALVE
    Publication number: 20150337984
    Abstract: Disclosed herein are an apparatus and method of measuring a coil current of a hydraulic valve. The apparatus includes a first coil current measurement unit configured to receive a first coil current control signal from a coil current control device during an ON operating section of the hydraulic valve in operating sections of the hydraulic valve operated by receiving power of a battery, and measure a first coil current value flowing through a coil of the hydraulic valve using a first switching element to be switched ON, and a second coil current measurement unit configured to receive a second coil current control signal from the coil current control device during an OFF operating section of the hydraulic valve in the operating sections of the hydraulic valve operated by receiving power of the battery, and measure a second coil current value flowing through the coil of the hydraulic valve using a second switching element to be switched ON.
    Type: Application
    Filed: May 21, 2015
    Publication date: November 26, 2015
    Applicant: MANDO CORPORATION
    Inventors: Jung-Wook SEO, Kwan-Seek KIM, Chang-Woo LEE