Patents by Inventor Chun Kang Koh

Chun Kang Koh 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: 11199384
    Abstract: The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: December 14, 2021
    Inventors: Chun Kang Koh, Juan Kiat Quek, Su Shan Ng, Wen Jun Edwin Ang, Cheng Hok Aw
  • Publication number: 20200363172
    Abstract: The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).
    Type: Application
    Filed: February 1, 2019
    Publication date: November 19, 2020
    Inventors: Chun Kang KOH, Juan Kiat QUEK, Su Shan NG, Wen Jun, Edwin ANG, Cheng Hok AW
  • Patent number: 8881655
    Abstract: The present invention describes a projectile (100,100a,100b,100c,100d) containing two luminescent dye components (123,125) and a dye powder (126). The first luminescent dye component (123) is contained in an ampoule (122) while the second luminescent dye component is contained in a vial (124) disposed inside the ampoule (122). A front crusher (120,120a) is provided at a front of the ampoule to crush into the ampoule and vial, thereby allowing the dye components to react and give a luminous glow. Upon impact at a target, a nose cap (110) of the projectile (100,100a,100b,100c,100d) breaks and a rear crusher (130) behind the ampoule throws the ampoule (122) forward and sputters the luminous dye out of the nose cap (110); at the same time, the dye powder (126) surrounding the ampoule is sputtered out to mark the point of impact. In addition, a thermal glow is also provided to mark the point of impact. Projectiles also allow light tracing.
    Type: Grant
    Filed: September 10, 2011
    Date of Patent: November 11, 2014
    Assignee: Advanced Material Engineering Pte Ltd
    Inventors: Cheng Hok Aw, Boon Siong Chong, Kar Hin Cheang, Chun Kang Koh, Renjie Xie
  • Publication number: 20140041545
    Abstract: The present invention describes a projectile (100, 100a,100b,100c,100d) containing two luminescent dye components (123,125) and a dye powder (126). The first luminescent dye component (123) is contained in an ampoule (122) whilst the second luminescent dye component is contained in a vial (124) disposed inside the ampoule (122). A front crusher (120,120a) is provided at a front of the ampoule to crush into the ampoule and vial, thereby allowing the dye components to react and give a luminous glow. Upon impact at a target, a nose cap (110) of the projectile (100,100a,100b,100c,100d) breaks and a rear crusher (130) behind the ampoule throws the ampoule (122) forward and sputters the luminous dye out of the nose cap (110); at the same time, the dye powder (126) surrounding the ampoule is sputtered out to mark the point of impact. In addition, a thermal glow is also provided to mark the point of impact. Projectiles also allow light tracing.
    Type: Application
    Filed: September 10, 2011
    Publication date: February 13, 2014
    Applicant: Advanced Material Engineering Pte Ltd.
    Inventors: Cheng Hok Aw, Boon Siong Chong, Kar Hin Cheang, Chun Kang Koh, Renjie Xie