Patents by Inventor Dong Ik Chi

Dong Ik Chi 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).

  • Optimized hydraulic control device for minimizing locking of a brake system in a two-wheeled vehicle
    Patent number: 9133863
    Abstract: The present invention relates to a hydraulic control device for an antilock brake system, which is capable of maintaining a certain amount of braking performance even in the event of a disturbance or repeated use, by enabling the restriction of the displacement of a control bolt to a certain range. Therefore, through the present invention, braking ability is not lost under any circumstances, and accidents caused by a loss of braking function due to the malfunctioning of a hydraulic control device for an antilock brake system can be averted.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 15, 2015
    Assignee: Dong Ik Chi
    Inventor: Dong Ik Chi
  • OPTIMIZED HYDRAULIC CONTROL DEVICE FOR MINIMIZING LOCKING OF A BRAKE SYSTEM IN A TWO-WHEELED VEHICLE
    Publication number: 20140047830
    Abstract: The present invention relates to a hydraulic control device for an antilock brake system, which is capable of maintaining a certain amount of braking performance even in the event of a disturbance or repeated use, by enabling the restriction of the displacement of a control bolt to a certain range. Therefore, through the present invention, braking ability is not lost under any circumstances, and accidents caused by a loss of braking function due to the malfunctioning of a hydraulic control device for an antilock brake system can be averted.
    Type: Application
    Filed: November 17, 2011
    Publication date: February 20, 2014
    Inventor: Dong Ik Chi
  • Mechanical oil pressure control apparatus for antilock brake system
    Patent number: 6357838
    Abstract: A mechanical oil pressure control apparatus for an antilock brake system including a recessed first body having an oil inlet passage communicating with a master cylinder and an oil outlet passage communicating with a wheel cylinder, a hollow second body threadedly coupled to a front end of the first body, a cylinder member sealably inserted into the first body to define an oil chamber communicating with the oil inlet and outlet passages, a piston slidably fitted in the cylinder member while being subjected to an oil pressure supplied from the master cylinder and exerted in the oil chamber in such a fashion that it slides axially in the oil chamber between a front position where the oil chamber is allowed to communicate with both the oil inlet and outlet passages and a rear position where the communication of the oil chamber with the oil outlet passage is cut off, a compression coil spring received in the second body and adapted to always urge the piston toward the front position against the oil pressure exert
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: March 19, 2002
    Inventor: Dong Ik Chi