Patents by Inventor Seok Ju Oh

Seok Ju Oh 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).

  • Cylinder device having improved wear resistance through optimal arrangement of fine textures
    Patent number: 9759325
    Abstract: There is provided a cylinder device having optimal arrangement of fine textures and optimal surface roughness capable of reducing wear of a cylinder bore side and a piston ring by processing fine textures in an optimal selection region of the cylinder bore side to improve lubrication characteristics between the piston ring and the cylinder bore side while reducing engine oil consumption by processing surface roughness of the cylinder bore side to an optimal status.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: September 12, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Seok Ju Oh, Sung Gi Kim, Kyu Bong Han
  • CYLINDER DEVICE HAVING IMPROVED WEAR RESISTANCE THROUGH OPTIMAL ARRANGEMENT OF FINE TEXTURES
    Publication number: 20140345453
    Abstract: There is provided a cylinder device having optimal arrangement of fine textures and optimal surface roughness capable of reducing wear of a cylinder bore side and a piston ring by processing fine textures in an optimal selection region of the cylinder bore side to improve lubrication characteristics between the piston ring and the cylinder bore side while reducing engine oil consumption by processing surface roughness of the cylinder bore side to an optimal status.
    Type: Application
    Filed: December 17, 2012
    Publication date: November 27, 2014
    Inventors: Seok Ju Oh, Sung Gi Kim, Kyu Bong Han
  • Rocker Arm Shaft with Improved Abrasion Resistance and Rocker Arm Shaft/Bush Assembly Comprising Same
    Publication number: 20130239741
    Abstract: The present disclosure relates to a rocker arm shaft and a rocker arm shaft/bush assembly including a rocker arm shaft, and a rocker arm bush which encloses the rocker arm shaft, in which the rocker arm shaft has a surface on which minutely processed concave-convex portions are formed, thereby achieving excellent lubricative characteristics and as a result having excellent abrasion resistance.
    Type: Application
    Filed: November 16, 2011
    Publication date: September 19, 2013
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Sung Gi Kim, Seok Ju Oh