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. 13, 2008
Filed:
Aug. 31, 2005
Applicants:
Kenichi Ozaki, Nakai, JP;
Taro Takahashi, Manaduru, JP;
Xiaoming Jiang, Odawara, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B 9/02 (2006.01); F26B 13/00 (2006.01); F04B 49/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Each of controllers includes: a transistor; a data processor for executing predetermined data processing and turning the transistor on or off in accordance with the data processing result; a pull-up resistor connected to an output terminal of the transistor; and a level separating resistor connected to the output terminal of the transistor, and the data processor of each controller detects a signal level of a control signal output from the output terminal of the transistor and judges whether or not any defect has occurred in its own controller, based on the detection result.