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:
Jul. 18, 1995
Filed:
Feb. 22, 1994
Christian Rigaux, Artannes-sur-Indre, FR;
Pascal Lhote, Saint-Cyr-sur-Loire, FR;
Claude Caillault, Saint-Roch, FR;
Christophe Houdayer, Tours, FR;
SKF France, Clamart Cedex, FR;
Abstract
The device for detecting the rotational speed of a rolling-contact bearing includes an encoding element provided with a multipolar ring with axial magnetism secured to the rotating race of the bearing. The device further includes a sensor element provided with a passive sensor with a coil wound in an annular magnetic flux concentrator of U-shaped cross-section, and with a sensor holder secured to the non-rotating race of the bearing. The multipolar ring and the sensor element are located radially with an air gap. The magnetic flux concentrator includes a cylindrical part delimited axially by two collecting branches situated radially outside the cylindrical part. At least one of the collecting branches includes teeth on its periphery. Also, that branch of the flux concentrator which is located on the same side as the rolling elements is inclined toward the adjoining row of rolling elements.