Patents by Inventor Seong Wook CHA

Seong Wook CHA 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).

  • Patent number: 12281650
    Abstract: Disclosed is an oil pump including: a pump module provided with a rotary shaft, an inner rotor coupling with the rotary shaft, an outer rotor rotated engaging with the inner rotor, an inlet for sucking fluid, and an outlet for pressing and discharging the sucked fluid; housings supporting the pump module; and a direction switching unit coupled between the housings and the outer rotor to keep an eccentric distance between the rotary shaft or a central axis line of the inner rotor and a central axis line of the outer rotor. According to the disclosure, there is provided an oil pump used for both forward rotation and reverse rotation, which does not require changing a suction area and a discharge area and direction switching is stably performed even when a power source rotates forwardly and reversely.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: April 22, 2025
    Assignee: YOUNGSHIN PRECISION CO., LTD
    Inventors: Do Jae Joo, Seong Wook Cha, Gahyeon Yi, Hui Do Ryu
  • Publication number: 20240352933
    Abstract: Disclosed is an oil pump including: a pump module provided with a rotary shaft, an inner rotor coupling with the rotary shaft, an outer rotor rotated engaging with the inner rotor, an inlet for sucking fluid, and an outlet for pressing and discharging the sucked fluid; housings supporting the pump module; and a direction switching unit coupled between the housings and the outer rotor to keep an eccentric distance between the rotary shaft or a central axis line of the inner rotor and a central axis line of the outer rotor. According to the disclosure, there is provided an oil pump used for both forward rotation and reverse rotation, which does not require changing a suction area and a discharge area and direction switching is stably performed even when a power source rotates forwardly and reversely.
    Type: Application
    Filed: August 5, 2022
    Publication date: October 24, 2024
    Applicant: YOUNGSHIN PRECISION CO., LTD
    Inventors: DO JAE JOO, SEONG WOOK CHA, GAHYEON YI, HUI DO RYU
  • Publication number: 20220178375
    Abstract: Disclosed is an electric water pump including: a main body; a motor module including a rotor and a stator to generate a rotational force with power supplied from an outside; a pump module coupled to a first side of the main body, and including an impeller spinning by the rotational force of the motor module, an inlet to introduce a fluid as the impeller spins, and an outlet; a controller housing coupled to a second side of the main body and coupling with a controller for controlling the motor module; and a rotary shaft transmitting the rotational force from the motor module to the impeller, wherein the rotor is formed by performing insert injection-molding after stacking a rotor core and coupling with a magnet, and the rotary shaft is pressed into the rotor so that the rotor and the rotary shaft can be formed as a single body.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 9, 2022
    Applicant: YoungShin Precision Co., Ltd
    Inventors: Do Jae JOO, Hong Ki KIM, Seong Wook CHA, Jae Gyeong LEE