Patents by Inventor Ichiro Hamaguchi

Ichiro Hamaguchi 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).

  • Vertical spindle duplex head for a grinder
    Patent number: 4590712
    Abstract: A vertical spindle duplex head for a grinder includes an annular pressure wheel and a receiver wheel arranged to rotate and revolve workpieces between the annular surfaces of the pressure wheel and the receiver wheel and a grindstone for one end portion of the workpieces driven in the opposite directions of rotation of the pressure wheel and receiver wheel and at their different rotational ratios. The workpieces rotate and revolve between these wheels, thereby grinding their end face by means of a grindstone arranged around the external periphery of a rotary carrier.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: May 27, 1986
    Assignees: Koyo Seike Company Limited, Koyo Machine Industries Company
    Inventors: Yasuo Sugiyama, Masaomi So, Ichiro Hamaguchi, Kenichi Maeda
  • Device for checking a d c source voltage relative to a predetermined value
    Patent number: 4044304
    Abstract: A device for testing the voltage of a voltage source comprises a bridge circuit, a differential switching circuit and an indicator element. The bridge circuit includes a first circuit comprising a first resistor; a second circuit comprising first diode means connected to the first circuit; a third circuit comprising a second resistor connected to the first circuit, the junction between the third and first circuits being connected to one terminal of the voltage source; and a fourth circuit comprising a serial connection of second diode means and a third resistor. One end of the fourth circuit is connected to the third circuit and the other end is connected to the second circuit. The junction between the fourth and second circuits is connected to the other terminal of the voltage source.
    Type: Grant
    Filed: February 11, 1976
    Date of Patent: August 23, 1977
    Assignee: Nippon Kogaku K.K.
    Inventors: Ichiro Hamaguchi, Kenji Toyoda
  • Device for checking a D.C. source voltage relative to a predetermined value
    Patent number: 3970933
    Abstract: A device for testing the voltage of a voltage source comprises a bridge circuit, a differential switching circuit and an indicator element. The bridge circuit includes a first circuit comprising a first resistor; a second circuit comprising first diode means connected to the first circuit; a third circuit comprising a second resistor connected to the first circuit, the junction between the third and first circuits being connected to one terminal of the voltage source; and a fourth circuit comprising a serial connection of second diode means and a third resistor. One end of the fourth circuit is connected to the third circuit and the other end is connected to the second circuit. The junction between the fourth and second circuits is connected to the other terminal of the voltage source.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: July 20, 1976
    Assignee: Nippon Kogaku K.K.
    Inventors: Ichiro Hamaguchi, Kenji Toyoda