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:
Nov. 19, 2013
Filed:
Sep. 08, 2009
Shoji Itomi, Kuwana, JP;
Shoji Itomi, Kuwana, JP;
NTN Corporation, Osaka, JP;
Abstract
A shaft and rolling bearings are mounted in the housing. A magnetic sensor is fixed to a first end surface of a shaft. A circuit board carrying a magnetic sensor is fixed to a surface of a lid of the housing at the second end. As a calibration voltage feed line, a cable is connected to the circuit board and extends outside through a hole formed through the lid. With the lid fixed in position, thereby applying a preload to rolling bearings, calibration voltage is supplied to the magnetic sensor through the calibration voltage feed line, thereby writing initial calibration parameters into the magnetic sensor from an external calibration device. After writing the parameters, the calibration voltage feed line is connected, at the outside, to a stabilizing output end of a power source input/output board fixed to the surface of the lid at the first end.