Patents by Inventor Hirohito Matui

Hirohito Matui 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).

  • Device and method for accurately detecting torque of auxiliary device
    Patent number: 5952586
    Abstract: An alternator provides its output current waveform directly or via a current probe to a low pass filter and a high pass filter. The resulting waveform is provided to a half-wave rectifier and a comparator to obtain a rectangular waveform. The arithmetic circuit determines the number of clock pulses between rectangular waves to obtain the rotation speed of the alternator. The torque due to auxiliary devices is computed based on the ratio of the rotation speed of a crankshaft to the rotation speed of the alternator.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: September 14, 1999
    Assignee: Nippon Soken, Inc.
    Inventors: Hirohito Matui, Mitsuo Inagaki