Sealing arrangement for a rotatable member

Abstract

A sealing arrangement for sealing a stationary member to a rotatable member wherein a neck of the rotatable member is coaxially received in a sleeve secured for rotation therewith and the sleeve is journaled for rotation in the stationary member. An extension ring is annularly secured to one end of the sleeve with a normally flat annular thrower seal of elastomeric material annularly engaged between this extension ring and the one end of the sleeve to provide a seal therebetween with inner and outer annular peripheral portions of the thrower seal radially protruding. The inner peripheral portion of the thrower seal annularly engages the neck of the rotatable member under elastic deformation to provide an annular static seal and a peripheral side face of the outer peripheral portion of the thrower seal annularly engages an annular seal rubbing surface of the stationary member under elastic deformation to provide an annular rubbing seal therebetween. A second annular rubbing seal may be positioned between the stationary member and the aforesaid extension ring to provide a second rubbing seal therebetween, with the second rubbing seal and the aforesaid thrower seal being relatively closely spaced to form an annular and continuous seal passage therebetween. This second rubbing seal may take on a configuration similar to that of the thrower seal, and drain passages are provided in the annular and continuous seal passage between the two seals.

Dependencies are inferred from the claim text.