Patents by Inventor Duc Woo Park

Duc Woo Park 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).

  • Fluid flow control apparatus for hydraulic pump of construction machine
    Patent number: 9016312
    Abstract: An apparatus for controlling the flow of a hydraulic pump of a construction machine according to the present disclosure includes: a pressure sensor detecting pressure signals corresponding to various control signal input values of the construction machine; a shuttle block including a plurality of shuttle valves dividing hydraulic lines connected with the pressure sensor into groups and extracting pressure oil of a hydraulic line under the highest pressure among hydraulic lines included in the corresponding group; auxiliary pressure sensors detecting the pressure of the pressure oil discharged from the shuttle block; electro proportional control valves in which opening rates are adjusted according to an applied signal and flows applied to signal lines are controlled to adjust discharge flows of main pumps; and a controller controlling the electro proportional control valves so that the opening rates of the electro proportional control valves are adjusted according to the magnitude of the pressure signal at the
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: April 28, 2015
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Hong Cheol Yun, Duc Woo Park
  • Construction equipment remote control system and method for controlling data transmission/reception while the construction equipment is in engine-off state
    Patent number: 8874945
    Abstract: The present disclosure relates to a system and a method of remote management of a construction equipment for controlling transmission and reception of data of the construction equipment in a a key-off state.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: October 28, 2014
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Hong Cheol Yun, Jung Mug Shin, Duc Woo Park
  • Construction Equipment Remote Control System and Method for Controlling Data Transmission/Reception While the Construction Equipment is in Engine-Off State
    Publication number: 20110320015
    Abstract: The present disclosure relates to a system and a method of remote management of a construction equipment for controlling transmission and reception of data of the construction equipment in a a key-off state.
    Type: Application
    Filed: December 22, 2009
    Publication date: December 29, 2011
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Hong Cheol Yun, Jung Mug Shin, Duc Woo Park
  • Fluid Flow Control Apparatus for Hydraulic Pump of Construction Machine
    Publication number: 20110240147
    Abstract: An apparatus for controlling the flow of a hydraulic pump of a construction machine according to the present disclosure includes: a pressure sensor detecting pressure signals corresponding to various control signal input values of the construction machine; a shuttle block including a plurality of shuttle valves dividing hydraulic lines connected with the pressure sensor into groups and extracting pressure oil of a hydraulic line under the highest pressure among hydraulic lines included in the corresponding group; auxiliary pressure sensors detecting the pressure of the pressure oil discharged from the shuttle block; electro proportional control valves in which opening rates are adjusted according to an applied signal and flows applied to signal lines are controlled to adjust discharge flows of main pumps; and a controller controlling the electro proportional control valves so that the opening rates of the electro proportional control valves are adjusted according to the magnitude of the pressure signal at the
    Type: Application
    Filed: December 15, 2009
    Publication date: October 6, 2011
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Hong Cheol Yun, Duc Woo Park