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:
Dec. 24, 2024
Filed:
Feb. 26, 2021
Applicant:
Komatsu Ltd., Tokyo, JP;
Inventors:
Naoki Sekiyama, Tokyo, JP;
Masahiro Suwano, 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);
U.S. Cl.
CPC ...
E21D 9/1093 (2013.01); E21D 9/11 (2013.01);
Abstract
The tunnel excavation device includes a front body section and a rear body section. The front body section includes a cutter head, a cutter head support, and a vertical shoe. The rear body section is disposed to a rear of the front body section and includes a gripper section for obtaining a reaction force when excavating. The cutter head includes a plurality of roller cutters. The cutter head support supports the cutter head. The vertical shoe is disposed below the cutter head support and is provided in a turnable manner to the cutter head support.