The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2010
Filed:
Mar. 16, 2006
Toshio Kobayashi, Tokyo, JP;
Kazuyoshi Takayama, Sendai, JP;
Ken-ichi Ueda, Chofu, JP;
Kazuhisa Otomo, Tokyo, JP;
Shigehito Uetake, Tokyo, JP;
Toshio Kobayashi, Tokyo, JP;
Kazuyoshi Takayama, Sendai, JP;
Ken-ichi Ueda, Chofu, JP;
Kazuhisa Otomo, Tokyo, JP;
Shigehito Uetake, Tokyo, JP;
Japan Drilling Co., Ltd., Tokyo, JP;
Tohoku University, Miyagi, JP;
National University Corporation the University of Electro-Communications, Tokyo, JP;
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 meansis irradiated in liquidin form of a laser beam having a wavelength with high absorptance of the liquidby laser-induced bubble generation means, generating a bubble flow, thus excavation of a submerged stratum may be carried out by using a laser-induced destruction effect. Moreover, a laser beamhaving low absorptance of the liquidis irradiated by laser irradiation meansand passed through the bubble flow, 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.