Patent ID: 8328163

Claim:
A vacuum valve having an open condition and a closed state resulting from a closing operation, the vacuum valve comprising: a housing having a sealing seat formed with a cone surface at a first cone angle; a valve disk having sealing seat formed with a cone surface at a second cone angle; and a sealing ring configured to be only slightly elastic, and during the closing operation and closed state of said valve disk, said sealing ring deforms only slightly or does not deform; said housing sealing seat and said disk sealing seat being arranged in spaced relationship with said respective cone angles being approximately the same and said sealing ring being positioned between said cone surfaces and fixed to said valve disk throughout the movement of said disk from the open condition to the closed state; said sealing ring cross section being essentially rectangular or rhombic or square and being formed with two substantially parallel spaced first sides and two substantially parallel spaced second sides, each said first side intersecting one of said second sides to form a point and each said first side intersecting the other of said second sides with a rounded profile, the cross section of said sealing ring having diametrically opposite rounded profile corners having radii of curvature shaped and configured to sealingly engage said housing and disk sealing seats when the vacuum valve is in the closed state, said opposite rounded profile corners being spaced radially and diametrically from one another, said sealing ring being formed with a symmetry axis aligned in a horizontal plane approximately perpendicular to the movement direction of said valve disk.