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:
Mar. 25, 2025
Filed:
Apr. 22, 2021
Applicant:
Komatsu Ltd., Tokyo, JP;
Inventors:
Masahiro Suwano, Tokyo, JP;
Naoki Sekiyama, Tokyo, JP;
Hiroshi Asano, Tokyo, JP;
Taku Arakawa, Tokyo, JP;
Assignee:
KOMATSU LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 9/10 (2006.01); E21D 9/11 (2006.01); E21D 11/40 (2006.01);
U.S. Cl.
CPC ...
E21D 9/112 (2013.01); E21D 9/1093 (2013.01); E21D 11/40 (2013.01);
Abstract
A tunnel excavation device includes a main body a frame and a workbench. The main body includes a front body section and a rear body section. The front body section includes a cutter head provided with a plurality of disk cutters. The rear body section is disposed behind the front body section and includes a gripper section for obtaining a reaction force when excavating. The frame is disposed continuously behind the main body. The workbench is disposed above the frame so as to be rotatable with respect to the frame.