Patent ID: 7603976

Claim:
A gas exchange valve of an internal combustion engine having a hollow valve shaft ( 1 ) and valve disk ( 7 ), wherein the valve disk ( 7 ) consists of a valve tray ( 5 ) and a valve cone ( 6 ) which is connected to the outer edge thereof, whereby the valve cone ( 6 ) tapers with an increase in distance from the valve tray ( 5 ); the hollow valve shaft ( 1 ), passing completely through the space surrounded by the valve cone ( 6 ), is fixedly connected to the valve tray ( 5 ) at one end and at the other end is fixedly connected to the tapering end of the valve cone ( 6 ), the valve shaft ( 1 ) consists of parts telescoping into one another, namely a lower shaft part ( 3 ) facing the valve tray ( 5 ) and an upper shaft part ( 2 ) connected thereto, whereby the lower shaft part ( 3 ) engages in a form-fitting manner in the upper shaft part ( 2 ), and the upper shaft part ( 2 ) and the lower shaft part ( 3 ) are joined in a shaft connecting area ( 4 ), in particular by being welded together, wherein the upper shaft part ( 2 ) develops into the adjacent outside circumference of the valve cone in a flush manner on its outside circumference, so the upper shaft part ( 2 ) and the area of the valve cone ( 6 ) directly adjacent thereto have the same outside diameter, the shaft connecting area and the connecting area between the valve shaft ( 1 ) and the valve cone ( 6 ) are designed as intermeshing connecting areas ( 4 ′).