END-FACE SEAL Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: rotatory friction ring is engageable with non-rotatory ring, with a working shoulder in the form of an axisymmetric boss on its end face. The internal and external side surfaces of the boss are formed by two arcs of the same radius. The arc centres are located on two mutually perpendicular planes passing through the axis of the non-rotatory ring symmetrically relative to the axis. The centres of the arc radii, forming the internal side surface, are shifted from the axis of the non-rotatory ring to this surface, the other centres - the other way round. All centres of the arc radii are located on a circumference whose diameter is not less than the maximum width of the boss. EFFECT: enhanced reliability. 1 dwg