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:
Jul. 14, 2015
Filed:
Nov. 29, 2011
Yoshinori Ikuta, Susono, JP;
Akinori Maruyama, Susono, JP;
Yoshihide Nakamura, Susono, JP;
Keisuke Ueta, Susono, JP;
Yoshinori Ikuta, Susono, JP;
Akinori Maruyama, Susono, JP;
Yoshihide Nakamura, Susono, JP;
Keisuke Ueta, Susono, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
A load circuit disconnection detector includes: a current sensor () for detecting current flowing through a wire (W) of a load circuit; and a protective device () for estimating temperature of the wire (W) based on the detected current and forcibly turning off a semiconductor switch (Q) if the estimated temperature of the wire reaches threshold temperature. The load circuit disconnection detector determines that there is a connection failure in the load circuit if a temperature increase calculated by a temperature calculation unit () is zero even a predetermined time (P) after the semiconductor switch (Q) is turned on.