Patents by Inventor Chang Hoe Koo

Chang Hoe Koo 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: 9669814
    Abstract: A sub master cylinder includes a body formed with a chamber in which oil is stored; a first sub piston having one end which is secured to one end of the body and the other end which extends toward the other end of the body and is disposed to cross the chamber; and a second sub piston disposed between an inner surface of the body and an outer surface of the first sub piston to be moved in the chamber.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: June 6, 2017
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Patent number: 9440628
    Abstract: A brake device for a vehicle includes: a cylinder body in which brake oil is compressed; a first piston pressurizing brake oil while moving along the inside of the cylinder body; a connection part having a smaller outer diameter than the first piston, and including one side connected to the first piston and the other side extended to the outside of the cylinder body; a pipe line part connecting the cylinder body and a wheel brake, and transferring the brake oil compressed through the movement of the connection part to the wheel brake; and a valve controlling the flow of the brake oil transferred along the pipe line part.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: September 13, 2016
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Chang Hoe Koo
  • Patent number: 9381894
    Abstract: Disclosed is an integrated braking system including a hydraulic piston cylinder unit that is operated by a brake pedal, a pressure medium storage unit that is connected to the hydraulic piston cylinder unit, a pressure generating unit that is driven by a motor, and has first and second hydraulic chambers that are divided by a piston movable within a housing, and a pressure control unit that transmits a pressure to a wheel unit from the hydraulic piston cylinder unit and the pressure generating unit. A hydraulic line directly connects the first hydraulic chamber and the pressure medium storage unit.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: July 5, 2016
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Patent number: 9352733
    Abstract: An electronic hydraulic brake device may include: a reservoir storing brake oil; a reaction cylinder connected to the reservoir, and changing a pedal force and brake oil pressure in connection with motion of a pedal; a reaction valve installed between the reservoir and the reaction cylinder so as to control transfer of brake oil; a wheel brake restraining rotation of each wheel in connection with the operation of the reaction cylinder; and a brake valve installed on a connection pipeline for connecting the wheel brake and the reaction cylinder so as to control transfer of brake oil.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: May 31, 2016
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Patent number: 9346443
    Abstract: An electronic hydraulic brake system may include: a main master cylinder driven by a motor in response to control of an electronic control unit (ECU), and supplying oil pressure to wheel cylinders; and a backup master cylinder forming a reaction force on a brake pedal in response to pressure of the brake pedal. When power of the ECU is cut off, the backup master cylinder may supply oil pressure to the main master cylinder.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: May 24, 2016
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Patent number: 9162660
    Abstract: Exemplary embodiments of the present invention relate to an electronic hydraulic brake device, including: a pedal cylinder configured to generate an oil pressure by a pressure of a pedal; a master cylinder configured to generate the oil pressure by sensing the pedal; wheel cylinders configured to be each mounted at a plurality of wheels and provide a braking force to the wheels; a storage configured to store a fluid; a mixing circuit configured to connect the pedal cylinder to some of the wheel cylinders, and communicate with the storage and the master cylinder; a master circuit configured to connect the master cylinder to the wheel cylinder and communicate with the storage; and a hydraulic compartment configured to connect the mixing circuit to the master circuit and limit a movement of the fluid.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: October 20, 2015
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Publication number: 20150137588
    Abstract: An electronic hydraulic brake system may include: a main master cylinder driven by a motor in response to control of an electronic control unit (ECU), and supplying oil pressure to wheel cylinders; and a backup master cylinder forming a reaction force on a brake pedal in response to pressure of the brake pedal. When power of the ECU is cut off, the backup master cylinder may supply oil pressure to the main master cylinder.
    Type: Application
    Filed: September 11, 2014
    Publication date: May 21, 2015
    Inventor: Chang Hoe Koo
  • Publication number: 20150115701
    Abstract: A brake device for a vehicle includes: a cylinder body in which brake oil is compressed; a first piston pressurizing brake oil while moving along the inside of the cylinder body; a connection part having a smaller outer diameter than the first piston, and including one side connected to the first piston and the other side extended to the outside of the cylinder body; a pipe line part connecting the cylinder body and a wheel brake, and transferring the brake oil compressed through the movement of the connection part to the wheel brake; and a valve controlling the flow of the brake oil transferred along the pipe line part.
    Type: Application
    Filed: November 22, 2013
    Publication date: April 30, 2015
    Applicant: Hyundai Mobis Co., Ltd.
    Inventor: Chang Hoe KOO
  • Publication number: 20150097418
    Abstract: An electronic hydraulic brake device may include: a reservoir storing brake oil; a reaction cylinder connected to the reservoir, and changing a pedal force and brake oil pressure in connection with motion of a pedal; a reaction valve installed between the reservoir and the reaction cylinder so as to control transfer of brake oil; a wheel brake restraining rotation of each wheel in connection with the operation of the reaction cylinder; and a brake valve installed on a connection pipeline for connecting the wheel brake and the reaction cylinder so as to control transfer of brake oil.
    Type: Application
    Filed: April 15, 2014
    Publication date: April 9, 2015
    Applicant: HYUNDAI MOBIS CO., LTD.
    Inventor: Chang Hoe Koo
  • Publication number: 20140354036
    Abstract: Exemplary embodiments of the present invention relate to an electronic hydraulic brake device, including: a pedal cylinder configured to generate an oil pressure by a pressure of a pedal; a master cylinder configured to generate the oil pressure by sensing the pedal; wheel cylinders configured to be each mounted at a plurality of wheels and provide a braking force to the wheels; a storage configured to store a fluid; a mixing circuit configured to connect the pedal cylinder to some of the wheel cylinders, and communicate with the storage and the master cylinder; a master circuit configured to connect the master cylinder to the wheel cylinder and communicate with the storage; and a hydraulic compartment configured to connect the mixing circuit to the master circuit and limit a movement of the fluid.
    Type: Application
    Filed: November 22, 2013
    Publication date: December 4, 2014
    Applicant: Hyundai Mobis Co., Ltd.
    Inventor: CHANG HOE KOO
  • Publication number: 20140333124
    Abstract: Disclosed is an integrated braking system including a hydraulic piston cylinder that is moved by a brake pedal, a pressure medium storage that is connected to the hydraulic piston cylinder, a pressure generating unit that is driven by a motor, and has two first and second hydraulic chambers that are divided by a piston within a housing, and a pressure control unit that transmits a pressure to a wheel unit from the hydraulic piston cylinder and the pressure generating unit. A hydraulic line connecting the first hydraulic chamber and the pressure medium storage is formed.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 13, 2014
    Applicant: Hyundai Mobis Co., Ltd.
    Inventor: Chang Hoe Koo
  • Publication number: 20130074491
    Abstract: A sub master cylinder includes a body formed with a chamber in which oil is stored; a first sub piston having one end which is secured to one end of the body and the other end which extends toward the other end of the body and is disposed to cross the chamber; and a second sub piston disposed between an inner surface of the body and an outer surface of the first sub piston to be moved in the chamber.
    Type: Application
    Filed: March 15, 2012
    Publication date: March 28, 2013
    Applicant: Hyundai Mobis Co., Ltd.
    Inventor: Chang Hoe Koo
  • Patent number: 7897039
    Abstract: An apparatus for collecting condensed water of an air conditioner evaporator in heavy construction equipment is disclosed, which is able to receive condensed water into a receiver from an evaporator and treats the same which comprises a body which is installed at one side of the evaporator and includes a plurality of support frames provided in the interior of the same, with its upper and lower sides being fixed with a vibration resistant member; a water collection pipe which allows the condensed water produced from the evaporator to be supplied to a water inlet valve; a storing tank which is connected with the water inlet valve and stores condensed water inputted via the water inlet valve; a water purification filter which filters dirt, heavy metallic substances and organic chemicals contained in the condensed water supplied from the storing tank; and a water purification tank which stores the filtered condensed water and has a pipe extended to the outside of the body.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: March 1, 2011
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventor: Chang Hoe Koo
  • Publication number: 20080017571
    Abstract: An apparatus for collecting condensed water of an air conditioner evaporator in heavy construction equipment is disclosed, which is able to receive condensed water into a receiver from an evaporator and treats the same which comprises a body which is installed at one side of the evaporator and includes a plurality of support frames provided in the interior of the same, with its upper and lower sides being fixed with a vibration resistant member; a water collection pipe which allows the condensed water produced from the evaporator to be supplied to a water inlet valve; a storing tank which is connected with the water inlet valve and stores condensed water inputted via the water inlet valve; a water purification filter which filters dirt, heavy metallic substances and organic chemicals contained in the condensed water supplied from the storing tank; and a water purification tank which stores the filtered condensed water and has a pipe extended to the outside of the body.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 24, 2008
    Inventor: Chang Hoe Koo