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. 04, 2012
Filed:
Dec. 18, 2007
Toshio Kobayashi, Tokyo, JP;
Kazuyoshi Takayama, Sendai, JP;
Kiyonobu Ohtani, Sendai, JP;
Satoru Umezu, Tokyo, JP;
Toshio Kobayashi, Tokyo, JP;
Kazuyoshi Takayama, Sendai, JP;
Kiyonobu Ohtani, Sendai, JP;
Satoru Umezu, Tokyo, JP;
Japan Drilling Co., Ltd., Tokyo, JP;
Tohoku University, Sendai, JP;
Japan Oil, Gas and Metals National Corporation, Kawasaki, JP;
Abstract
An object is to provide a method capable of boring a borehole even when quartz glass or silicon dioxide is deposited as molten dross by laser irradiation. A laser irradiation position of a workpiece is irradiated with a laser having wavelength of 1.2 μm or longer and a high factor of absorption into liquid, for example, a CO2 laser, from a laser oscillator through liquid. By high pressure generated in an advancing microbubble flow occurring in the liquid, molten dross is scattered. Thus, the processing, such as boring, of the rock is performed.