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:
Aug. 26, 2014
Filed:
Jul. 20, 2011
Mark E. Lacroix, Winchester, NH (US);
Mark E. LaCroix, Winchester, NH (US);
Timken US Corporation, North Canton, OH (US);
Abstract
A sensing apparatus includes first and second magnet assemblies. The first magnet assembly includes first and second magnets that have respective first and second opposite magnetic fields. The first magnet has a plurality of dimensions including an inner circumferential dimension, an outer circumferential dimension, an inner axial dimension, an outer axial dimension, and a radial dimension, and the second magnet has a corresponding plurality of dimensions. The inner circumferential dimension or outer circumferential dimension of the first magnet is relatively smaller than the corresponding dimension of the second magnet. A second magnet assembly is positioned at a distance from the first magnet assembly and includes a third magnet having a third magnetic field opposite to the first magnetic field. The first magnet assembly is a high-resolution track, and the second magnet assembly is a low-resolution track.