Patents by Inventor Hiroaki Kajikawa

Hiroaki Kajikawa 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).

  • Pressure gauge calibration apparatus
    Patent number: 9476790
    Abstract: This is an easy-to-use pressure gauge calibration apparatus, which uses a pressure gauge as a standard device and is not affected by an order of calibration pressure points or pressure holding time. The pressure gauge calibration apparatus includes a pressure gauge serving as a standard device, the pressure gauge being calibrated in advance by a calibration procedure to repeat necessarily restoring a predetermined pressure state after data acquisition at each calibration pressure point, and adjusting pressure to a subsequent calibration pressure point, a pressure generation control device, a shut-off valve, and a measurement control unit.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: October 25, 2016
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hiroaki Kajikawa, Tokihiko Kobata
  • PRESSURE GAUGE CALIBRATION APPARATUS
    Publication number: 20140223988
    Abstract: To provide an easy-to-use pressure gauge calibration apparatus that uses a pressure gauge as a standard device and is not affected by an order of calibration pressure points or pressure holding time. There is provided a pressure gauge calibration apparatus including a pressure gauge serving as a standard device, the pressure gauge being calibrated in advance by a calibration procedure to repeat necessarily restoring a pressure zero state after data acquisition at each calibration pressure point, and adjusting pressure to a subsequent calibration pressure point; a pressure generation control device; a shut-off valve; and a measurement control unit.
    Type: Application
    Filed: September 13, 2012
    Publication date: August 14, 2014
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hiroaki Kajikawa, Tokihiko Kobata