Patents by Inventor Joo-Un CHO

Joo-Un CHO 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: 11999325
    Abstract: The present disclosure relates to a friction member and a master cylinder including the same. The master cylinder includes a cylinder body with a bore formed therein, a piston configured to move forward and backward in the bore and protrude a portion thereof from the cylinder body, a housing configured to surround the protruding portion of the piston and having a through hole formed therein such that an input rod connected to a brake pedal to press the piston is inserted, a friction member provided between the housing and the piston to increase a frictional force with the piston when the piston moves forward and backward, and a pedal simulator connected to the piston to provide a repulsive force to the brake pedal.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: June 4, 2024
    Assignee: HL MANDO CORPORATION
    Inventor: Joo Un Cho
  • Publication number: 20210394730
    Abstract: The present disclosure relates to a friction member and a master cylinder including the same. The master cylinder includes a cylinder body with a bore formed therein, a piston configured to move forward and backward in the bore and protrude a portion thereof from the cylinder body, a housing configured to surround the protruding portion of the piston and having a through hole formed therein such that an input rod connected to a brake pedal to press the piston is inserted, a friction member provided between the housing and the piston to increase a frictional force with the piston when the piston moves forward and backward, and a pedal simulator connected to the piston to provide a repulsive force to the brake pedal.
    Type: Application
    Filed: October 23, 2019
    Publication date: December 23, 2021
    Inventor: Joo Un CHO
  • Patent number: 10507501
    Abstract: According to the embodiment of the present disclosure, it provides a method of manufacturing a piston of a pump for brake system, the piston fabricated using a piercing process by press forming to have an inlet path communicating with a suction port through which oil is introduced.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: December 17, 2019
    Assignee: MANDO CORPORATION
    Inventor: Joo-Un Cho
  • Publication number: 20170333963
    Abstract: According to the embodiment of the present disclosure, it provides a method of manufacturing a piston of a pump for brake system, the piston fabricated using a piercing process by press forming to have an inlet path communicating with a suction port through which oil is introduced.
    Type: Application
    Filed: May 22, 2017
    Publication date: November 23, 2017
    Inventor: Joo-Un CHO