Patents by Inventor Seung-Un Yang

Seung-Un Yang 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: 8142586
    Abstract: Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor. Piercing Fin Stabilized Discarding Sabot) wherein a plurality of fiber mats are laminated instead of one-directional prepreg ply and whole part is reinforced by stitching through long fiber bundle in order to enhance circumferential shear strength, and high quality fiber-reinforced composite sabot is manufactured in a short time using resin-injection vacuum assisted resin transfer molding after stitching.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: March 27, 2012
    Assignee: Agency for Defense Development
    Inventors: In-Seo Park, Jin-Seok Kim, Seung-Un Yang, Young-Jun Jeon
  • Patent number: 7935208
    Abstract: Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot), wherein both Band lamination and Hoop lamination are used in manufacturing a polymer based FRP(Fiber Reinforced Plastic) for use in the sabot in order to prevent the prepreg delamination in the circumferential direction caused by the radial lamination. The method for manufacturing a fiber-reinforced composite sabot of the present invention comprises the steps of a sub-segment forming step, a piece forming step and a sabot forming step, and the lamination is carried out with improved segment lamination form preventing the damage in the 120 degree surface in the process of treating the sabot.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: May 3, 2011
    Assignee: Agency for Defense Development
    Inventors: In-Seo Park, Jin-Seok Kim, Seung-Un Yang, Young-Jun Jeon
  • Publication number: 20100276082
    Abstract: Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) which has improved strength to weight ratio with low weight and high strength by using one-directional fiber prepreg ply lamination method. In order to prevent delamination of the radially laminated composite sabot, short fibers are deposited on the interfacial plane thereby spreading the expansion force to fiber as well as the resin.
    Type: Application
    Filed: September 23, 2008
    Publication date: November 4, 2010
    Inventors: In-Seo Park, Jin-Seok Kim, Seung-Un Yang, Young-Jun Jeon
  • Publication number: 20100276830
    Abstract: Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) wherein a plurality of fiber mats are laminated instead of one-directional prepreg ply and whole part is reinforced by stitching through long fiber bundle in order to enhance circumferential shear strength, and high quality fiber-reinforced composite sabot is manufactured in a short time using resin-injection vacuum assisted resin transfer molding after stitching.
    Type: Application
    Filed: September 23, 2008
    Publication date: November 4, 2010
    Inventors: In-Seo Park, Jin-Seok Kim, Seung-Un Yang, Young-Jun Jeon
  • Publication number: 20090268570
    Abstract: An apparatus for changing a recording speed of an optical recording medium by analyzing wobble signals in real time during a recording operation, includes a signal process unit which outputs a cyclic redundancy check (CRC) signal that checks for a generation of errors on the optical recording medium from absolute time in pregroove (ATIP) information output from the optical recording medium during the recording operation, and a speed control unit which changes the recording speed during the recording operation according to a comparison of the CRC signal output from the signal process unit with a reference value. In the apparatus, the recording speed is limited or lowered in response to a signal quality of a recording section being less than an acceptable level during the recording operation. Accordingly, buffer under run and defects of read-in start position and seek fail, which are generated during a ZCLV operation, are prevented.
    Type: Application
    Filed: May 6, 2009
    Publication date: October 29, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-ro Go, Seung-un Yang
  • Publication number: 20090107355
    Abstract: Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot), wherein both Band lamination and Hoop lamination are used in manufacturing a polymer based FRP( Fiber Reinforced Plastic) for use in the sabot in order to prevent the prepreg delamination in the circumferential direction caused by the radial lamination. The method for manufacturing a fiber-reinforced composite sabot of the present invention comprises the steps of a sub-segment forming step, a piece forming step and a sabot forming step, and the lamination is carried out with improved segment lamination form preventing the damage in the 120 degree surface in the process of treating the sabot.
    Type: Application
    Filed: September 23, 2008
    Publication date: April 30, 2009
    Inventors: In-Seo Park, Jin-Seok KIM, Seung-Un Yang, Young-Jun Jeon
  • Publication number: 20030198155
    Abstract: An apparatus for changing a recording speed of an optical recording medium by analyzing wobble signals in real time during a recording operation, includes a signal process unit which outputs a cyclic redundancy check (CRC) signal that checks for a generation of errors on the optical recording medium from absolute time in pregroove (ATIP) information output from the optical recording medium during the recording operation, and a speed control unit which changes the recording speed during the recording operation according to a comparison of the CRC signal output from the signal process unit with a reference value. In the apparatus, the recording speed is limited or lowered in response to a signal quality of a recording section being less than an acceptable level during the recording operation. Accordingly, buffer under run and defects of read-in start position and seek fail, which are generated during a ZCLV operation, are prevented.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 23, 2003
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Sung-ro Go, Seung-un Yang