Patents by Inventor Kazuhisa Otomo

Kazuhisa Otomo 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).

  • Method and device for excavating submerged stratum
    Patent number: 7802384
    Abstract: An excavation technique for a stratum capable of excavating a submerged stratum such as a layer containing an underground resource by using laser irradiation in liquid is provided. In this technique, a laser beam transmitted through laser transmission means 20 is irradiated in liquid 90 in form of a laser beam having a wavelength with high absorptance of the liquid 90 by laser-induced bubble generation means 35, generating a bubble flow 36, thus excavation of a submerged stratum may be carried out by using a laser-induced destruction effect. Moreover, a laser beam 41 having low absorptance of the liquid 90 is irradiated by laser irradiation means 39 and passed through the bubble flow 36, thereby applying a thermal effect to a stratum to destroy rock and excavate the stratum. The destruction effect and the thermal effect also may be cooperatively worked.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: September 28, 2010
    Assignees: Japan Drilling Co., Ltd., Tohoku University, National University Corporation the University of Electro-Communications
    Inventors: Toshio Kobayashi, Kazuyoshi Takayama, Ken-ichi Ueda, Kazuhisa Otomo, Shigehito Uetake
  • Method and device for excavating submerged stratum
    Publication number: 20090126235
    Abstract: An excavation technique for a stratum capable of excavating a submerged stratum such as a layer containing an underground resource by using laser irradiation in liquid is provided. In this technique, a laser beam transmitted through laser transmission means 20 is irradiated in liquid 90 in form of a laser beam having a wavelength with high absorptance of the liquid 90 by laser-induced bubble generation means 35, generating a bubble flow 36, thus excavation of a submerged stratum may be carried out by using a laser-induced destruction effect. Moreover, a laser beam 41 having low absorptance of the liquid 90 is irradiated by laser irradiation means 39 and passed through the bubble flow 36, thereby applying a thermal effect to a stratum to destroy rock and excavate the stratum. The destruction effect and the thermal effect also may be cooperatively worked.
    Type: Application
    Filed: March 16, 2006
    Publication date: May 21, 2009
    Applicants: JAPAN DRILLING CO., LTD., TOHOKU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION THE UNIVERSITY OF ELECTROCOMMUNICATIONS
    Inventors: Toshio Kobayashi, Kazuyoshi Takayama, Ken-ichi Ueda, Kazuhisa Otomo, Shigehito Uetake