Patent ID: 7481417

Claim:
A vacuum valve comprising: a valve body at which a conical sealing surface is arranged so as to surround a valve opening; a valve disk which is rotationally symmetrical with respect to a center axis and at which a conical sealing surface is arranged and which is displaceable between an open position in the open state of the vacuum valve and a closed position in a sealed state of the vacuum valve; movement of the valve disk when closing the vacuum valve being carried out, at least in a final part of the closing movement before reaching the closed position, in a closing direction extending parallel to the center axis of the valve disk; a sealing ring having a first sealing surface and a second sealing surface being pressed against the sealing surface of the valve body on one side and against the sealing surface of the valve disk on the other side in the closed position of the valve disk; said valve disk, said valve body and said sealing ring being made of metal at least in the areas of the sealing surfaces; said valve disk being constructed so as to be curved or angled considered in an axial section through the center and, in this respect, enclosing an angle of less than 90° with the closing direction in the unloaded state at least in a radial outer portion adjoining the sealing surface; said valve disk having an elasticity such that a displacement of the radial outer edge of the valve disk relative to a point in the center of the valve disk of at least 0.1% of the diameter of the valve disk in direction of the center axis of the valve disk being bought about in the closed position of the valve disk relative to the open position of the valve disk by an elastic deformation of the valve disk.