Patents by Inventor Yoshiyasu Toyama

Yoshiyasu Toyama 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).

  • Method and apparatus for molding optical glass elements or the like
    Patent number: 5346522
    Abstract: A method and apparatus are disclosed which place a glass blank on a lower mold arranged in an opposed relation to an upper mold, heat these molds and glass blank by an infrared lamp unit or high-frequency coil arranged around the molds and press-mold an optical glass element. In the method and apparatus, the infrared lamp unit or high-frequency coil is supported by a supporting mechanism such that it is movable along a direction in which the mold is moved. In cases where a relative position of the infrared lamp unit or high-frequency coil to the mold varies depending upon the shape and size of such molds or the shape and size of optical glass elements obtained, the infrared lamp or high-frequency coil is adjustably moved relative to the mold by a movable mechanism using a motor or air cylinder as an operation source. By using temperature sensors attached to both the molds, the temperatures of the upper and lower molds are controlled to a corresponding desired level.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: September 13, 1994
    Assignee: Toshiba Machine Co., Ltd.
    Inventors: Yoshizo Komiyama, Fumio Arai, Yutaka Hasegawa, Tetsuya Tanioka, Hisataka Sugiyama, Yoshiyasu Toyama, Fusao Nakanishi
  • Method for molding optical glass elements
    Patent number: 5340374
    Abstract: The apparatus for molding an optical glass element is made up of relatively movable upper and lower molds for press molding a glass blank, and a plurality of infrared ray lamps encircling the upper and lower molds, temperature measuring devices for measuring the temperatures of the upper and lower molds, and a controller responsive to the outputs of the temperature measuring devices for controlling electric inputs to the infrared ray lamps thereby maintaining the temperatures of the upper and lower molds at predetermined values.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: August 23, 1994
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Yoshizo Komiyama, Fumio Arai, Yoshiyasu Toyama, Yutaka Hasegawa, Tetsuya Tanioka
  • Apparatus for molding optical glass elements
    Patent number: 5282878
    Abstract: The apparatus for molding an optical glass element is made up of relatively movable upper and lower molds for press molding a glass blank, and a plurality of infrared ray lamps encircling the upper and lower molds, temperature measuring devices for measuring the temperatures of the upper and lower molds, and a controller responsive to the outputs of the temperature measuring devices for controlling electric inputs to the infrared ray lamps thereby maintaining the temperatures of the upper and lower molds at predetermined values.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: February 1, 1994
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Yoshizo Komiyama, Fumio Arai, Yoshiyasu Toyama, Yutaka Hasegawa, Tetsuya Tanioka