Patents by Inventor Kazuhiko Endoh

Kazuhiko Endoh 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 for measuring properties of underground water and method therefor
    Patent number: 5189909
    Abstract: An apparatus and method for measuring the properties of underground water are disclosed. The device comprises a measuring apparatus with a measuring sensor for measuring the properties of the underground water, a pair of expandable and contractible packers arranged above and below the measuring apparatus, a transmitting means for sending measurement signals from the measuring apparatus, and a receiving means located at the ground surface for receiving the measurement signals from the transmitting apparatus. The method of the present invention comprises the steps of placing a measurement apparatus with a measuring sensor in a bored hole at a desired depth, arranging a pair of packers so that the measuring sensor is interposed therebetween, pumping water to the ground surface from the space between the two packers, and comparing the properties of the water pumped to the surface with the properties of the water measured with the above-mentioned measuring sensor.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: March 2, 1993
    Assignees: The Tsurumi-Seiki Co., Ltd., Shimizu Construction Co., Ltd.
    Inventors: Takayasu Oike, Kazuhiko Endoh, Takashi Suzuki, Kazuhiro Watanabe, Hirochika Suzuki, Jun Shimada, Takashi Ishii, Tateo Adachi, Yoshihiro Horie
  • Probe for measuring an electric conductivity
    Patent number: D397628
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: September 1, 1998
    Assignee: The Tsurumi-Seiki Co., Ltd.
    Inventors: Shigenori Suzuki, Kazuhiko Endoh