Patents by Inventor Yuki OTOSHIMA

Yuki OTOSHIMA 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).

  • Discharge lamp
    Patent number: 9633829
    Abstract: A discharge lamp includes an emitter other than thorium, which is added to a cathode in a luminous tube. Early depletion of the emitter due to excessive vaporization of the emitter from the cathode is prevented, while achieving stable lighting even at the start-up of the lighting. A main body part (31) of the cathode (3) is made from a high-melting-point metal material that contains no thorium, and a front end part (32) thereof is made from a high-melting-point metal material that contains an emitter (other than thorium). A sintered compact (34), which contains an emitter (other than thorium) at a concentration higher than the emitter contained in the front end part (32), is buried in a sealed space (33) that is formed within the main body part (31) and/or the front end part (32). The sintered compact (34) abuts against the front end part (32).
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: April 25, 2017
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Yukiharu Tagawa, Tomoyoshi Arimoto, Mitsuo Funakoshi, Yukio Yasuda, Yuki Otoshima, Hirohisa Iwabayashi
  • DISCHARGE LAMP
    Publication number: 20160155625
    Abstract: A discharge lamp includes an emitter other than thorium, which is added to a cathode in a luminous tube. Early depletion of the emitter due to excessive vaporization of the emitter from the cathode is prevented, while achieving stable lighting even at the start-up of the lighting. A main body part (31) of the cathode (3) is made from a high-melting-point metal material that contains no thorium, and a front end part (32) thereof is made from a high-melting-point metal material that contains an emitter (other than thorium). A sintered compact (34), which contains an emitter (other than thorium) at a concentration higher than the emitter contained in the front end part (32), is buried in a sealed space (33) that is formed within the main body part (31) and/or the front end part (32). The sintered compact (34) abuts against the front end part (32).
    Type: Application
    Filed: June 17, 2014
    Publication date: June 2, 2016
    Applicant: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Yukiharu TAGAWA, Tomoyoshi ARIMOTO, Mitsuo FUNAKOSHI, Yukio YASUDA, Yuki OTOSHIMA, Hirohisa IWABAYASHI