Patents by Inventor Hee Seog Kong

Hee Seog Kong 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).

  • Pilot signal block assembly for construction machinery and control valve assembly having the same
    Patent number: 9651159
    Abstract: A pilot signal block assembly includes at least two base blocks arranged to be spaced apart from each other in a first direction and having a plurality of receiving holes configured to move a spool therein in one direction, a plurality of cartridge blocks arranged on a surface of the base block to be spaced apart from each other in a second direction, each of the cartridge blocks including a signal passage which is in fluid communication with the corresponding receiving hole to supply a pilot oil to the corresponding receiving hole, and a plurality of electro proportional pressure reducing valves installed in the cartridge blocks respectively and controlling an opening rate of the signal passage in proportional to an electric control signal.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: May 16, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Dae Gyun Choi, Hee Seog Kong, Ki Hwan Hong
  • PILOT SIGNAL BLOCK ASSEMBLY FOR CONSTRUCTION MACHINERY AND CONTROL VALVE ASSEMBLY HAVING THE SAME
    Publication number: 20150337969
    Abstract: A pilot signal block assembly includes at least two base blocks arranged to be spaced apart from each other in a first direction and having a plurality of receiving holes configured to move a spool therein in one direction, a plurality of cartridge blocks arranged on a surface of the base block to be spaced apart from each other in a second direction, each of the cartridge blocks including a signal passage which is in fluid communication with the corresponding receiving hole to supply a pilot oil to the corresponding receiving hole, and a plurality of electro proportional pressure reducing valves installed in the cartridge blocks respectively and controlling an opening rate of the signal passage in proportional to an electric control signal.
    Type: Application
    Filed: May 22, 2015
    Publication date: November 26, 2015
    Inventors: Dae Gyun Choi, Hee Seog Kong, Ki Hwan Hong