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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.:

US 9388690 B1

PDFFull Text
Date of Patent:
Jul. 12, 2016

Filed:

Jun. 05, 2013

Tunnel excavation method

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:

Global IP Counselors, LLP

Primary Examiner:

John Kreck

Assistant Examiner:

Michael Goodwin

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.

Find Patent Forward Citations

Kawai, Kazunari. (2016). Tunnel excavation method (U.S. Patent No. 9388690). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9388690

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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