Patent ID: 7583077
Filing Date: 2009-09-01
Classification: B60C

Abstract:
1. A magnetic pressure sensing device for rotatably moving parts, comprising: a magnetic field source element associated to said rotatably moving part; and a magnetic field sensing element associated to a fixed part to measure parameters of a magnetic field determined by said magnetic field source element, said parameters of the magnetic field being a function of pressure applied to said rotatably moving part, wherein: said magnetic field source element comprises rotating means for rotating around at least one axis the direction of said magnetic field as a function of the pressure applied to said rotatably moving part, said magnetic field source element comprises at least a first permanent magnet for generating the magnetic field, said rotating means include converting means for converting a force determined by said pressure applied along said axis into a rotation of the direction of said magnetic field (H), and a second permanent magnet associated with said converting means, said first permanent magnet is associated at a fixed position along said axis to a wall portion of a chamber defined in said converting means, said wall portion superiorly closing said chamber, said converting means for converting said force into a displacement along said axis comprise a resilient membrane defining an inferior closing portion of said chamber, wherein said second permanent magnet includes an anisotropic ferromagnetic layer.