Patents by Inventor Gyu-Chull Doh

Gyu-Chull Doh 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: 11549509
    Abstract: An electric hydraulic pump for a transmission includes: a motor including a motor cover, a motor case coupled with the motor cover, and a stator and a rotor disposed within the motor cover and the motor case; and a pump including a pump case forming a pump chamber, and a gear rotor which is disposed within the pump chamber, connected with the rotor through a motor shaft and receives rotational power of the motor. In particular, a plurality of oil circulation holes are formed in the motor cover and a connecting hole is formed in the motor cover corresponding to the pump case, and an oil flow channel is formed within the pump case for connecting the connecting hole and an oil inlet of the pump chamber.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: January 10, 2023
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung Wook Jang, Kihyup Kim, Woo Jung Kim, June Ho Lee, Jin Seung Lim, Seungwan Noh, Youngho Moon, Taegeun Kim, Jaeyeol Yun, Jungwook Lee, Chulwan Park, Chi Hun Cho, Gyu Chull Doh, Kyoo Ho Lee, Hyun Chul Kim, Joung Chul Kim, Hyun Duk Chang, Jin Hee Lee, Yongho Jung, Chang Yeon Cho, Yun Seok Sung, Hyeonjin Kim, Joo Hang Lee
  • Publication number: 20200309121
    Abstract: An electric hydraulic pump for a transmission includes: a motor including a motor cover, a motor case coupled with the motor cover, and a stator and a rotor disposed within the motor cover and the motor case; and a pump including a pump case forming a pump chamber, and a gear rotor which is disposed within the pump chamber, connected with the rotor through a motor shaft and receives rotational power of the motor. In particular, a plurality of oil circulation holes are formed in the motor cover and a connecting hole is formed in the motor cover corresponding to the pump case, and an oil flow channel is formed within the pump case for connecting the connecting hole and an oil inlet of the pump chamber.
    Type: Application
    Filed: July 17, 2019
    Publication date: October 1, 2020
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung Wook JANG, Kihyup KIM, Woo Jung KIM, June Ho LEE, Jin Seung LIM, Seungwan NOH, Youngho MOON, Taegeun KIM, Jaeyeol YUN, Jungwook LEE, Chulwan PARK, Chi Hun CHO, Gyu Chull DOH, Kyoo Ho LEE, Hyun Chul KIM, Joung Chul KIM, Hyun Duk CHANG, Jin Hee LEE, Yongho JUNG, Chang Yeon CHO, Yun Seok SUNG, Hyeonjin KIM, Joo Hang LEE
  • Patent number: 8763764
    Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed thereto, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve and a locking unit disposed within the cylinder for unlocking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: July 1, 2014
    Assignees: Hyundai Motor Company, Unick Corporation
    Inventors: Sung Wook Jang, Gyu Chull Doh, Chang-Hoon Lee
  • Publication number: 20130020156
    Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed thereto, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve and a locking unit disposed within the cylinder for unlocking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power.
    Type: Application
    Filed: December 9, 2011
    Publication date: January 24, 2013
    Applicants: Unick Corporation, Hyundai Motor Company
    Inventors: Sung Wook JANG, Gyu Chull Doh, Chang-Hoon Lee
  • Patent number: 6853901
    Abstract: A method for controlling the safety mode of a four-wheel drive to control the magnetic clutch at a safety mode duty to reduce overload for a predetermined period of time when the slip of the magnetic clutch is greater than an allowable slip, despite controlling the magnetic clutch at its maximum duty.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: February 8, 2005
    Assignee: Hyundai Motor Company
    Inventor: Gyu-Chull Doh
  • Patent number: 6793606
    Abstract: An automotive transmission shift controller to reduce a shift shock occurring while shifting from a reverse driving range to a forward driving range, and to improve durability at the same time. The controller detects a shift lever position, an engine revolution speed, a throttle valve opening, and a speed of the vehicle, and performing a shift control operation for shifting into a first gear if the shift lever is changed from a reverse driving range to a forward driving range and the engine revolution state is an idling state, and if the detected throttle valve opening and the vehicle speed respectively are not more than predetermined values.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 21, 2004
    Assignee: Hyundai Motor Company
    Inventor: Gyu-Chull Doh
  • Publication number: 20040049332
    Abstract: A method for controlling the safety mode of a four-wheel drive to control the magnetic clutch at a safety mode duty to reduce overload for a predetermined period of time when the slip of the magnetic clutch is greater than an allowable slip, despite controlling the magnetic clutch at its maximum duty.
    Type: Application
    Filed: June 18, 2003
    Publication date: March 11, 2004
    Inventor: Gyu-Chull Doh
  • Publication number: 20020082139
    Abstract: The present invention is to reduce a shift shock occurring while shifting from a reverse driving range to a forward driving range, and to improve durability at the same time.
    Type: Application
    Filed: November 26, 2001
    Publication date: June 27, 2002
    Inventor: Gyu-Chull Doh