Patents by Inventor Setsuro Kawasaki

Setsuro Kawasaki 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).

  • Position measuring device using change in inductance of coil, float-type flowmeter, and position measuring method
    Patent number: 6889563
    Abstract: A float-type flowmeter measures the rate of a fluid flowing upwardly through a tube based on the position of a float movably disposed in the tube and including a magnetic material. A coil is wound around the tube such that the intervals gradually decrease in an axial direction. The coil is excited by an alternating current supplied from an inductance change detector. The inductance change detector detects a change in the inductance of the coil which is caused when the float moves in the axial direction, and generates a voltage. A voltage-to-position (flow rate) converter determines a flow rate from the voltage corresponding to the position of the float.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: May 10, 2005
    Assignee: SMC Kabushiki Kaisha
    Inventors: Seiji Tomita, Setsuro Kawasaki, Motohiro Sotome, Tsuyoshi Watanabe
  • Position measuring device using change in inductance of coil, float-type flowmeter, and position measuring method
    Publication number: 20030226407
    Abstract: A float-type flowmeter measures the rate of a fluid flowing upwardly through a tube based on the position of a float movably disposed in the tube and including a magnetic material. A coil is wound around the tube such that the intervals gradually decrease in an axial direction. The coil is excited by an alternating current supplied from an inductance change detector. The inductance change detector detects a change in the inductance of the coil which is caused when the float moves in the axial direction, and generates a voltage. A voltage-to-position (flow rate) converter determines a flow rate from the voltage corresponding to the position of the float.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 11, 2003
    Applicant: SMC Kabushiki Kaisha
    Inventors: Seiji Tomita, Setsuro Kawasaki, Motohiro Sotome, Tsuyoshi Watanabe