Patents by Inventor Nobuyuki Kasuya

Nobuyuki Kasuya 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).

  • Arc tube with pinch seal and dimensional relationship and method for forming the same
    Patent number: 6653785
    Abstract: An arc tube and method for forming an arc tube in which an electrode assembly including a tungsten electrode and a molybdenum foil are joined together in a partially overlapped state and pinch sealed into a pinch seal portion of the arc tube body to suppress leakage due to peeling of the molybdenum foil and prolong the life period of the arc tube. An overlapped length L1 of a tungsten electrode and a molybdenum foil is set to be 2D≦L1≦0.8W with respect to the diameter D of the tungsten electrode and the width W of the molybdenum foil. In another embodiment, the distance L2 between the molybdenum foil and a discharge space is set to be B≦L2≦0.8A with respect to the width A and the thickness B of a pinch seal portion.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: November 25, 2003
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Michio Takagaki, Masaya Shido, Yukihiro Kobayakawa, Masayuki Umehara, Nobuyuki Kasuya, Takeshi Fukuyo, Yoshitaka Ohshima
  • Arc tube and method for forming the same
    Publication number: 20020105272
    Abstract: An arc tube and method for forming an arc tube in which an electrode assembly including a tungsten electrode and a molybdenum foil are joined together in a partially overlapped state and pinch sealed into a pinch seal portion of the arc tube body to suppress leakage due to peeling of the molybdenum foil and prolong the life period of the arc tube. An overlapped length L1 of a tungsten electrode 26 and a molybdenum foil 30 is set to be 2D≦L1≦0.8 W with respect to the diameter D of the tungsten electrode 26 and the width W of the molybdenum foil 30, whereby occurrence of peeling of the molybdenum foil 30 is effectively suppressed while effectively suppressing occurrence of breakage of the molybdenum foil 30. In another embodiment, the distance L2 between the molybdenum foil 30 and a discharge space 24 is set to be B≦L2≦0.
    Type: Application
    Filed: December 4, 2001
    Publication date: August 8, 2002
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Michio Takagaki, Masaya Shido, Yukihiro Kobayakawa, Masayuki Umehara, Nobuyuki Kasuya, Takeshi Fukuyo, Yoshitaka Ohshima