Patent ID: 7862007

Claim:
A lightweight valve comprising: a valve stem; a hollow valve cone with a hollow space having an end of greater diameter, the end having an inner circumference, an outer circumference and an end face between the inner circumference and the outer circumference; and a valve disk closing the hollow space on one side and having a flat side facing the valve cone; the valve stem being connected to a stem connection element formed on or fastened to the valve disk; a valve cone support located at a distance from the valve disk and provided in the hollow space, the valve cone support being located on the stem connection element and projecting above the flat side; and the valve disk having a longitudinal portion extending from the flat side of the valve disk, the flat side of the valve disk and the longitudinal portion defining a recess serving as a centering or supporting seat for receiving the end of greater diameter of the valve cone, the valve disk including a step extending upward from the flat side of the valve disk, the step including an angled surface that is angled with respect to the flat side of the valve disk, the angled surface supporting the inner circumference of the end of greater diameter of the valve cone, the longitudinal portion supporting the end face of the end of greater diameter of the valve cone, the longitudinal portion being frustoconical and a having a cone angle that is the same as a cone angle of the valve cone at the end of greater diameter such that a continuous transition is brought about in a connection region between the longitudinal portion and the end of greater diameter of the valve cone; wherein the valve cone includes an end of smaller diameter extending axially as a tubular projection to contact the stem connection element, the tubular projection having a reduced thickness in relation to a remainder of the cone so that the tubular projection nestles against the stem connection element.