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.:

US 7474070 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 06, 2009

Filed:

Feb. 22, 2007
Applicants:

Yasushi Miyazawa, Maebashi, JP;

Keiji Sato, Maebashi, JP;

Inventors:

Yasushi Miyazawa, Maebashi, JP;

Keiji Sato, Maebashi, JP;

Assignee:

NSK Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 7/00 (2006.01); H02K 17/32 (2006.01); B62D 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A torque detection portion includes a first arm having a detection coil Land a resistor R, and a second arm having a detection coil Land a resistor R. When a test mode is set, a reference voltage Vhaving an abnormal value is outputted to a monitoring portion. An abnormal condition is intentionally caused in the monitoring portion. A main torque signal Vis compared with a sub torque signal Vin the monitoring portion. When the reference voltage Vset in the monitoring portionhas the abnormal value, a sub torque signal Vhaving a level of 0 (V=0) is forcibly outputted in a normal condition. Then the signal Vis equal to the signal V, the monitoring portiondetermines that a shortcircuit occurs between a main torque signal line and a sub torque signal line.


Find Patent Forward Citations

Miyazawa, Yasushi. (2009). Electric power steering apparatus (U.S. Patent No. 7474070). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7474070

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