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:
Jul. 12, 2016
Filed:
Jun. 05, 2013
Applicant:
Komatsu Ltd., Tokyo, JP;
Inventors:
Kazunari Kawai, Kawasaki, JP;
Shinichi Terada, Kawasaki, JP;
Yuuichi Kodama, Hiratsuka, JP;
Masaaki Uetake, Kawasaki, JP;
Hiroshi Asano, Kobe, JP;
Takashi Minami, Nishinomiya, JP;
Junya Tanimoto, Kyoto, JP;
Assignee:
KOMATSU LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D 9/01 (2006.01); E21D 9/11 (2006.01); E21D 9/14 (2006.01); E21D 9/10 (2006.01); E21F 17/00 (2006.01);
U.S. Cl.
CPC ...
E21D 9/1093 (2013.01); E21D 9/008 (2016.01); E21D 9/01 (2016.01); E21D 9/1006 (2013.01); E21D 9/112 (2013.01); E21D 9/14 (2013.01); E21F 17/00 (2013.01);
Abstract
This tunnel excavation method includes a step of excavating three first tunnels that are substantially parallel to each other in a first excavation step. Second tunnels are excavated that intersect the first tunnels in a second excavation step. A boring machine is used that performs excavation in a state in which a gripper pushes against the side wall of the tunnel.