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:
Nov. 22, 1977
Filed:
Mar. 12, 1976
Hisanori Uchino, Tokyo, JA;
Masamichi Takada, Tokyo, JA;
Takahiro Shimizu, Kawasaki, JA;
Masamitsu Shibayama, Yokohama, JA;
Fumiya Furuno, Yokohama, JA;
Hokushin Electric Works, Ltd., Tokyo, JA;
Abstract
A system for controlling a power shovel for use in civil engineering works is described. The control system comprises a manual control lever consisting of a control boom, a control arm and a control bucket which are miniature of a boom, an arm and a bucket of the power shovel, and a control circuit. The control circuit includes means for detecting the displacement of the elements of the control lever, means for detecting the displacement of the elements of the power shovel, means for comparing the displacement of the control lever with one of the power shovel. The differential signal from the circuit is applied to servo-mechanisms for following up the power shovel in accordance with the movement of the control lever. The power shovel can be controlled equally with the manual control lever.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile