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:
Feb. 10, 1976
Filed:
Apr. 29, 1974
Applicant:
Inventors:
Kenichi Mabuchi, Tokyo, JA;
Kogiro Komatsu, Tokyo, JA;
Assignee:
Mabuchi Motor Co. Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; A63H / ; H02K / ;
U.S. Cl.
CPC ...
200 6139 ; 4624 / ; 2001 / ; 310116 ;
Abstract
An automatic circuit breaker senses the remaining charge in series connected batteries driving a motor whose rotor shaft bearing and stator are rotatably supported by a fixed member, sensing the reaction torque of the motor. The power circuit is broken when the reaction torque drops below a predetermined value indicating that at least one of the batteries has discharged beyond a certain point to prevent reverse charging of the discharged battery.