Metallic sealing device for a high-vacuum closure

Metallic sealing device for a high-vacuum closure where the sealing device is repeatedly opened and closed, such as a high-vacuum valve, comprising a first sealing surface formed as a surface of revolution, a second sealing surface formed as a surface of revolution, said first and second sealing surfaces being coaxial, said sealing surfaces being repeatedly adjustable relative to one another in the axial direction for movement between an open position and a closed position, a metallic sealing ring located between said first and second sealing surfaces, said sealing ring having a cross-sectional configuration capable of rolling on said sealing surfaces when said first and second sealing surfaces are moved relative to one another between the open and closed positions, said sealing ring consists of a substantially non-ductile material, in the closed position of the sealing device the sealing forces act on said first and second sealing surfaces and on said sealing ring in the range of exclusively elastic deformation, said sealing ring being fixed to one of said first and second sealing surfaces by shrinking said sealing ring theron, the generating angle of said first and second sealing surfaces in the region of contact with said sealing ring is smaller than the friction angle, and at least the surfaces of said sealing ring in contact with said first and second sealing surface have a rounded convex configuration.