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. 26, 1996
Filed:
Feb. 24, 1994
Applicant:
Inventors:
Mitsutoshi Hayashi, Ohmiya, JP;
Akitaka Fujita, Tokyo, JP;
Shingo Nagashima, Tokyo, JP;
Isao Fujimori, Higashimurayama, JP;
Assignees:
Tokyo Gas Co., Ltd., Tokyo, JP;
Kabushiki Kaisha Iseki Kaihatsu Koki, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ; E21D / ;
U.S. Cl.
CPC ...
405143 ; 299-14 ; 299-18 ; 405138 ; 405146 ;
Abstract
When a shield tunneling machine is deviated from the scheduled line while being propelled, the deviation of the shield tunneling machine from the scheduled line is detected and according to the data obtained on the deviation of the shield tunneling machine from the scheduled line, the propelling direction of the shield tunneling machine is automatically controlled.