Patent ID: 8230832

Claim:
A vane-type camshaft adjuster having a stator and a rotor; said cam shaft adjuster defining central axis and having a side plane arranged perpendicular to the central axis, a coil spring abutting said side plane and having a radial inner end and a radial outer end; said coil spring being connected at one of said radial outer and inner ends to said rotor and at the other of said radial outer and inner ends to said stator, whereby said coil spring strives to maintain said rotor at a certain angular position opposite said stator, said coil spring having a rectangular profile, wherein a spring section is angled through the side plane such that the coil spring is supported opposite the stator or the rotor in a pivot-proof positive fitting manner; wherein, the coil spring comprises two opposed longer edges and two opposed shorter edges, the longer edges deviating from the shorter edges, wherein one of the shorter edges faces the side plane and the other of the shorter edges faces away from the same side plane.