Patent ID: 6938602

Claim:
A multi-piece valve for reciprocating piston engines, comprising a valve stem having a head-side end and a flange; and a valve head including a combustion chamber-side, a center through-opening extending to the combustion chamber-side, and an annular bearing surface, wherein the center through-opening has a larger section at the combustion chamber side, wherein the valve stem extends into the center through-opening of the valve head, wherein the flange of the valve stem bears against the annular bearing surface of the valve head to limit the insertion depth of the valve stem into the center through-opening of the valve head, wherein the head-side end of the valve stem is expanded in the larger section of the center through-opening, wherein the larger section of the center through-opening and the expanded head-side end of the valve stem deviate from a rotationally symmetrical shape to form a positive torsional interlock connection between the valve stem and the valve head.