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:
Feb. 27, 2007
Filed:
Jan. 23, 2003
Hendrik Anne Mol, Sleeuwijk, NL;
Johannes Andrianus Maria Duits, Bodegraven, NL;
Hendrik Anne Mol, Sleeuwijk, NL;
Johannes Andrianus Maria Duits, Bodegraven, NL;
AB SKF, Gothenburg, SE;
Abstract
Disclosed is a rotational speed sensor comprising a rotatable ring. The rotational speed sensor has K magnetic pole pairs distributed angularly over the rotatable ring. Also, sensors are positioned relative to the rotatable ring such that a varying magnetic field is detected. The sensors comprise a first pair being positioned 2πL/K radians apart. The sensors further comprise a second pair being positioned 2πM/K radians apart. The first pair of sensors and second pair of sensors are positioned at a relative position of (2π/K)*((2n−1)/2 radians. L, M are integers between one and K and n is an integer greater than one.