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:
May. 15, 2012
Filed:
Aug. 21, 2008
Roland Mattheis, Jena, DE;
Roland Mattheis, Jena, DE;
Horst Siedle GmbH & Co. KG, Furtwangen, DE;
Abstract
A magnetic revolution counter for the unambiguous determination of a definable number of revolutions of a rotating element to be determined. The aim of creating such a revolution counter allowing a determination of any arbitrarily definable number of revolutions, for example up to values of N>4000 or more as defined, and enabling a cost-effective and small design, is achieved in that a plurality of sensor elements (to) are provided, which are formed by closed loops having magnetic domains attached and guiding the same, containing at least one ferromagnetic, respectively soft magnetic, layer. The loops have tapered protuberances directed toward the loop interior, wherein the number of protuberances provided per loop is determined in a defined manner deviating from loop to loop, and electric contact arrangements are provided, which allow the detection of any changes in the electric resistance of predetermined loop sections after a completed change of location of magnetic domains due to the effect of the outer rotating magnetic field in predetermined loop sections, and wherein the said resistance values can be supplied to an analysis unit for the purpose of allocating the number of revolutions of the rotating element.