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:
Oct. 13, 2015
Filed:
Apr. 05, 2011
Matthew Luke Fyie, Canton, MI (US);
Gerard Patrick Kuchta, Grosse Pointe Park, MI (US);
Steve Adam Hermann, Fenton, MI (US);
Matthew Luke Fyie, Canton, MI (US);
Gerard Patrick Kuchta, Grosse Pointe Park, MI (US);
Steve Adam Hermann, Fenton, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A magnetic field sensor is employed to determine a rotational velocity of an element by sensing frequency variations in a magnetic flux during rotation of the element. The magnetic field sensor includes a sensor face provided with obstacles, such as a series of spaced, substantially parallel grooves arranged perpendicular to a direction in which contamination tends to move across the face during operation of the sensor. The obstacles inhibit movement of contamination across the face such that the contamination does not cause false variations in the magnetic flux which would degrade sensor signals.