Patent ID: 6662770
Filing Date: 2003-12-16
Classification: F01L

Abstract:
Valve rotator comprising:an annular body provided in a circumferential direction with plural ball pockets, each ball pocket including inclined ball races and each of which including a ball and a tangential spring, the tangential spring in a rest position holding the respective ball at an upper point of the respective inclined ball race; an annular cover rotatable about a rotation axis and axially displaceable relative to the annular body; an axial spring device positioned between the annular body and the annular cover and configured to press the annular body and the annular cover axially apart in the rest position, and, if a valve spring tension is applied, the annular body and annular cover are pressed axially against each other and the balls roll along the ball races to a lower point resulting in a defined rotation between the annular body and the annular cover, the balls being in direct contact with the annular cover and spaced from the axial spring device radially to the rotation axis; and an antifriction bearing provided between the axial spring device and the annular body or annular cover, the antifriction bearing supporting one axial side of the axial spring device, wherein, in a radial direction, the axial spring device is placed on an inside and the balls on an outside and are spaced from one another.