Patent ID: 9284998
Filing Date: 2016-03-15
CPC Classification: B62J,B62M,F16D

Claim Text:
1. A freewheel hub comprising a rotating hub shell for carrying a free running wheel, wherein torque is coupled to the rotating hub shell via a torque transmitting member, which is coupled to the hub shell or forms a part of the hub shell, the freewheel hub further comprising: a) at least one magneto-elastically active region directly or indirectly attached to or forming a part of the torque transmitting member in such a manner that the applied torque is transmitted to the active region comprising at least one magnetically polarized region such that the polarization becomes increasingly helically shaped as the applied torque increases and b) a magneto-elastic sensor means having at least one magnetic field sensor being arranged proximate to the at least one magneto-elastically active region for outputting a signal corresponding to a torque-induced magnetic flux emanating from the magnetically polarized region, characterized in that the torque transmitting member is a hollow shaft having an interior space, and wherein the magnetic field sensors of the sensor means are arranged inside the interior space of the hollow shaft.