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:
Dec. 06, 2016
Filed:
Oct. 10, 2011
Alexander Braun, Pforzheim, DE;
Wolfgang Welsch, Heidelberg, DE;
Matthias Waibler, Remshalden-Hebsack, DE;
Klaus Burkhardt, Asperg, DE;
Mathias Kimmerle, Steinheim, DE;
Alexander Braun, Pforzheim, DE;
Wolfgang Welsch, Heidelberg, DE;
Matthias Waibler, Remshalden-Hebsack, DE;
Klaus Burkhardt, Asperg, DE;
Mathias Kimmerle, Steinheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An angle sensor for determining a rotation angle of a rotatable body, such as a steering column in a motor vehicle, includes a gear wheel. The orientation of a magnetic field generated by the gearwheel is configured to be detected by a magnetic field sensor. The gear wheel is comprised of a magnetisable material, such as hard ferrite, into which a magnetization is introduced. The gear wheel is stronger in a central region than in an edge region in which the teeth are arranged. In order to weakly magnetize the edge region, which minimizes a negative influence of the teeth on the homogeneity of the generated magnetic field, the front face of the gear wheel is configured to be magnetized. The magnetization process advantageously takes place at the same time as an injection moulding process to form the gearwheel. A method is implemented to produce the gear wheel.