Patents by Inventor Joonkyu Song

Joonkyu Song 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: 20220242384
    Abstract: Provided is an electromechanical brake system comprising an actuator of an electromechanical brake operated by a motor, the electromechanical brake system including: a motor driving unit configured to drive the motor; and a control unit configured to be electrically connected to the motor driving unit, wherein the control unit is configured to: calculate a first rotation angle of a spindle in a brake apply mode of the electromechanical brake, calculate a second rotation angle of the spindle in a braking release mode of the electromechanical brake, and when a difference between the calculated first rotation angle and the calculated second rotation angle exists, control a notification device to notify a wear state of a brake pad.
    Type: Application
    Filed: January 27, 2022
    Publication date: August 4, 2022
    Inventors: Seungtae BAEK, Joonkyu SONG, Kyungho JUNG
  • Publication number: 20220235839
    Abstract: Disclosed herein a electromechanical brake includes a power converter including a nut provided in a cylinder portion of a caliper housing slidably coupled to a carrier and configured to rotate by receiving a driving force from an actuator, and a spindle connected to the nut and configured to move forward or backward by rotation of the nut in a first direction or a second direction; a pressing member coupled to a front side of the spindle and configured to press a pad plate; and a position adjuster screwed into the cylinder portion so that the power converter is mounted and configured to adjust a relative position of the caliper housing in response to an operation of the power converter.
    Type: Application
    Filed: January 21, 2022
    Publication date: July 28, 2022
    Inventors: Seungtae BAEK, Joonkyu SONG, Kyungho JUNG
  • Publication number: 20220024426
    Abstract: Disclosed are a parking actuator and an electromechanical brake including the same. The parking actuator, which is connected to a brake actuator that performs braking of a vehicle, includes a parking gear connected to the brake actuator to be rotatable together, a parking lever having one side hingedly fixed and the other side engaged with the parking gear, a parking motor provided to generate power, a power conversion unit including a spindle member rotating by receiving a rotational driving force of the parking motor and a nut member screwed to the spindle member to move forward or backward, and a pressing unit installed on the nut member to press the parking lever by the nut member moved forward or backward.
    Type: Application
    Filed: July 18, 2021
    Publication date: January 27, 2022
    Inventors: Seungtae BAEK, Joonkyu SONG, Kyungho JUNG
  • Patent number: 7493986
    Abstract: An electric power steering apparatus for an automobile includes a reduction mechanism having a worm shaft and a worm wheel, the worm shaft having a worm formed on an outer peripheral surface of the worm shaft, the worm shaft being contained in a housing, the worm wheel being formed on a side of the steering shaft, the reduction mechanism being driven by the motor; a support member for enclosing an end-side outer peripheral surface of the worm shaft; and an elastic member for applying elastic force to the support member in a direction slanted away from an axial direction of the worm shaft. The gap between the worm wheel and the worm shaft is compensated for and backlash is avoided. Since a single elastic member is used, the number of components is reduced, the manufacturing process is simplified, and the manufacturing cost is reduced.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: February 24, 2009
    Assignee: Mando Corporation
    Inventors: Seongjoo Kim, Joonkyu Song, Taebong Noh, Byoungkuk Kim
  • Publication number: 20070062754
    Abstract: An electric power steering apparatus for an automobile includes a reduction mechanism having a worm shaft and a worm wheel, the worm shaft having a worm formed on an outer peripheral surface of the worm shaft, the worm shaft being contained in a housing, the worm wheel being formed on a side of the steering shaft, the reduction mechanism being driven by the motor; a support member for enclosing an end-side outer peripheral surface of the worm shaft; and an elastic member for applying elastic force to the support member in a direction slanted away from an axial direction of the worm shaft. The gap between the worm wheel and the worm shaft is compensated for and backlash is avoided. Since a single elastic member is used, the number of components is reduced, the manufacturing process is simplified, and the manufacturing cost is reduced.
    Type: Application
    Filed: February 27, 2006
    Publication date: March 22, 2007
    Applicant: Mando Corporation
    Inventors: Seongjoo Kim, Joonkyu Song, Taebong Noh, Byoungkuk Kim