Patent ID: 7225687
Filing Date: 2007-06-05
Classification: B62D,G01L

Abstract:
1. A power steering apparatus comprising: a rotational shaft including an input shaft, and an output shaft connected with the input shaft by a torsion bar; a coil unit including a coil surrounding the rotational shaft, and a terminal portion projecting radially outward from the coil to make electrical connection; an impedance varying member to vary impedance of the coil in accordance with torque of the rotational shaft; a torque sensing circuit connected with the terminal portion, to sense the torque of the rotational shaft in accordance with the impedance of the coil; and a housing containing the rotational shaft, the coil unit and the impedance varying member, and including an axial bore containing the rotational shaft, and an insertion opening which extends radially into the axial bore and which is sized to allow insertion of the coil unit radially through the insertion opening into the axial bore, the terminal portion of the coil unit being electrically connected with the torque sensing circuit through the insertion opening.