Patent ID: 6945367

Claim:
A rotor assembly that is mounted on a hub which is retained on an axle of a vehicle, said rotor assembly includes a radial disc and an exciter ring through which a sensor detects the rotation of the radial disc with respect to the axle, said a radial disc that is offset from a mounting flange fixed to said hub by a cylindrical body and has a first surface that functions as a first friction face and a second surface that function as a second friction face when respectively engaged by first and second friction members to attenuate the rotation of said radial disc during a brake application, said first and second friction members on engagement with said first and second friction faces generating thermal energy that is carried from said radial disc through said cylindrical body and into said mounting flange, said radial disc reacting to a predetermined thermal energy level by moving out of a perpendicular alignment with said hub, said exciter ring being characterized by a cylindrical member having a first end and a second end with a sensor flange thereon, said first end being concentrically retained in said cylindrical body of said rotor such that an axial lip on said sensor flange engages said radial disc to define a gap between said sensor flange and said radial disc, said sensor flange having a plurality of first and second reluctance sections located thereon that are aligned with said sensor to provide a signal corresponding to the rotation of said rotor, said gap allowing said radial disc to move independently of said sensor flange such that said plurality of first and second reluctance sections remain aligned with said sensor with changes in the perpendicular alignment of the radial disc and said hub and said signal remains as an accurate indication of rotation.