Patents by Inventor Ictitaro Tani

Ictitaro Tani 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).

  • Gas chromatographic apparatus
    Patent number: 4470832
    Abstract: A gas chromatographic apparatus having at least two gas separation columns arranged in parallel to each other, the outlet of the first gas separation column being connected to a gas sensor through a column switch valve, and the outlet of the second gas separation column being connected to the column switch valve through a gas detection time-controlling pipe, where when the first gas separation column is communicated with the gas sensor, the outlet of the second gas separation column is made open to the atmosphere by the column switch valve, or when the second gas separation column is communicated with the gas sensor, the outlet of the first gas separation column is made open to the atmosphere by the column switch valve, or the apparatus having a first gas separation column whose inlet is connected to the switch valve and at least two second columns whose inlets are connected to the outlet of the first gas separation column, whose outlets are connected to the gas sensor and which are arranged in parallel to ea
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: September 11, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Katuo Sugawara, Ictitaro Tani, Hideo Tsukioka, Etsuo Ohe, Etsunori Mori
  • Method and apparatus for detecting gas components in oil in oil-filled device
    Patent number: 4444040
    Abstract: In an apparatus for detecting gas components in the oil in an oil-filled device, which comprises a gas-storing chamber being provided at an oil-filled device containing an insulating oil through a gas-permeating material capable of separating gas components from the insulating oil, a gas calibration tube being provided at the gas-storing chamber through a switch valve, and a gas chromatographic device connected to the gas calibration tube through the switch valve, any influence of gas components in a subatmospheric pressure is eliminated and exact concentrations of gas components are detected by providing at least one stirring mixer having at least one throttle perforation in a carrier gas passage for supplying the gas components from the gas calibration tube to the gas chromatographic device at the upstream side of a gas separation column of the gas chromatographic device, or by proving a circulation passage between the gas-storing chamber and the gas calibration tube, a valve capable of being exposed to the
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: April 24, 1984
    Assignees: Hitachi, Ltd., Shikoku Electric Power Company, Inc.
    Inventors: Seiichi Sakai, Toshihiko Gange, Katuo Sugawara, Hideo Tsukioka, Ictitaro Tani, Shigeo Shiono, Etsunori Mori