Patents by Inventor Mitsuru Wakao

Mitsuru Wakao 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).

  • Control method and equipment for charging ready-mixed concrete additives batchwise
    Patent number: 4008093
    Abstract: A control method for charging ready-mixed concrete additives batchwise which aims at keeping the slump of ready-mixed concrete within a certain range and making longer transportation by truck mixer possible without degrading the quality, where the slump of ready-mixed concrete is detected electrically as a change in the mixing torque so that, when this detected value reaches a value set beforehand, a motor receives a control instruction to charge additives for adjusting slump into the ready-mixed concrete and so that the operating time of the motor for charging additives and the interval until control operation is reset may be adjusted with a timer.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: February 15, 1977
    Assignees: Japanese National Railways, Kao Soap Co., Ltd., Kayabakogyo-Kabushiki-Kaisha
    Inventors: Toshiyuki Kitsuda, Kenichi Hattori, Hiromi Nakagawa, Mitsuru Wakao, Tsunehisa Matsuda
  • Equipment for charging ready-mixed concrete additives batchwise
    Patent number: 3998437
    Abstract: Equipment for charging ready-mixed concrete additives batchwise, which aims at keeping the slump of ready-mixed concrete within a certain range and making longer transportation by truck mixer possible without degrading the quality. The slump of ready-mixed concrete is detected electrically as a change in the mixing torque so that, when this detected value reaches a value set beforehand, a motor receives a control instruction to charge additives for adjusting slump into the ready-mixed concrete. The operating time of the motor for charging additives and the interval until control operation is reset and may be adjusted with a timer.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: December 21, 1976
    Assignees: Japanese National Railways, Kao Soap Co., Ltd., Kayabakogyo-Kabushiki-Kaisha
    Inventors: Toshiyuki Kitsuda, Kenichi Hattori, Hiromi Nakagawa, Mitsuru Wakao, Tsunehisa Matsuda