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:
May. 21, 1991
Filed:
Jul. 26, 1990
Applicant:
Inventors:
Yoshiharu Kiritani, Urawa, JP;
Yutaka Onishi, Yokohama, JP;
Shigeyoshi Tagata, Ogaki, JP;
Koichi Umeno, Tokyo, JP;
Assignees:
Sato Kogyo Co., Ltd., Toyama, JP;
Ishikawajima Harima Jukogyo Kabushiki Kaisha, Tokyo, JP;
Tokyo Keiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405143 ; 405141 ;
Abstract
Directional control of a shield excavator is automatically carried out merely by inputting a direction of rotational moment to which the excavator is directed and a magnitude of the moment.