Mechanism of rotation, in particular of an internal combustion engine valve

摘要

P rotation mechanism of a valve member about its longitudinal axis for which it performs a motion -, - between the open and closed positions. / p & & p & it comprises first and second mobile elements axially and to rotate with respect to each other along and around the longitudinal axis a belleville washer disposed between the elements comprises in its central part a hollow, the concave surface bears against the periphery of the mobile elements such as balls or the turns of an annular spring which, in cooperation with the washer, rotate the elements with respect to one another and thus the valve with respect to its seat, when the said elements are displaced axially with respect to the other. / p & & p & application to the mechanism by a valve of an internal combustion engine. / p