Patents by Inventor Hiroharu Shimada

Hiroharu Shimada 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: 6724145
    Abstract: The invention provides an arc tube with improved chromaticity and start-up characteristics that does not contain mercury, and provides a vehicle headlamp equipped with a metal halide lamp that contains no mercury in the arc tube. Among other improvements, the evaporation of low melting point metal halides is promoted and the start-up characteristics of the arc tube are improved.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: April 20, 2004
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Masaaki Muto, Shigeru Shibayama, Hiroharu Shimada, Isamu Sato, Shinya Omori, Yasuhisa Yaguchi, Naoyuki Matsubara, Yoshifumi Takao, Toshiyuki Nagahara
  • Method for manufacturing small tubular lamps
    Patent number: 5108331
    Abstract: In a method for manufacturing small tubular lamps, a moving amount of a tube stock is adjusted according to a wall thickness thereof to make the stock-guide amount uniform, and the internal pressure during the stock-guide step is also adjusted so as to produce a suitable dimension of the outside diameter thereof, whereby the working amount in the succeeding step is reduced to decrease errors in dimensional tolerances, particularly in wall thickness and internal volume.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: April 28, 1992
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Hiroharu Shimada, Yasuhisa Yaguchi, Masaaki Muto