Patent ID: 7391203
Filing Date: 2008-06-24
Classification: F16H,G01D,G01P

Abstract:
1. A magnetic field sensor for measurement of the rotation speed of a rotating transmission component, the sensor comprising: a Hall probe having an electrical main current direction, an induction axis and an electrical field direction, the induction axis being at a right angle to the electrical main current direction, the electrical field direction being at a right angle to the electrical main current direction and at a right angle to the induction axis, the Hall probe located in a housing which surrounds the Hall probe, the housing at least partially comprising plastic, the housing comprising an injection molded component, wherein; a permanent magnet sprayed into the housing and attached to an inside surface of the housing, the permanent magnet comprising a ring or hollow cylinder having a longitudinal axis aligned with the induction axis of the Hall sensor, the permanent magnet having a magnetic field, the Hall probe located in an area, of influence of the magnetic field of the permanent magnet.