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. 02, 1995
Filed:
Jul. 29, 1992
Motoharu Shimizu, Kumagaya, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A phase detecting actuator for a steering system having a rotatable steering shaft and a rotatable output shaft coupled to the steering shaft so that the output shaft is rotatable relative to the steering shaft includes a cylindrical magnet attached to and rotatable with one of the steering shaft and the output shaft of the steering system. An electromagnetic system includes a magnetic coil and first and second cylindrical poles having opposite polarities and communicating with the magnetic coil, the first and second poles attached to and rotatable with the other of the steering shaft and the output shaft of the steering system. The magnetic coil generates an input signal corresponding to magnetic flux generated by the relative rotation between the cylindrical magnet and the first and second poles, and a control unit receives the input signal from the magnetic coil and generates an output signal to energize the magnetic coil to create a magnetic positioning force between the cylindrical magnet and the first and second poles to position the output shaft relative to the steering shaft.