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. 18, 1990
Filed:
Jan. 09, 1990
Applicant:
Inventors:
Akihiko Tsukahara, Yokohama, JP;
Toshio Iwaoka, Yokohama, JP;
Yuichi Yamaguchi, Yokohama, JP;
Tsutomu Danzaki, Yokohama, JP;
Assignee:
Jidosha Denki Kogyo Kabushiki Kaisha, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318280 ; 318293 ; 318294 ; 318490 ; 340653 ;
Abstract
A motor driving device is provided with switches connected with both terminals of a motor in an H-bridge connection and malfunction detectors connected with both terminals of said motor. The malfunction detectors are comprised of an impression part and a detection part which can detect the breakdown of the respective switches caused by open breakage or short breakage according to an output signal from the detection part corresponding to an input signal from the impression part.