Patent attributes
A sealing assembly is provided for sealing an interface between two shafts, including a primary and secondary seal and a rotatable shaft sleeve having inner and outer sleeves forming a sealing cavity therebetween, and enclosing one of the seals. The secondary seal contacts the outer sleeve, and the primary seal contacts the inner sleeve, with the secondary seal circumscribing part of the primary seal. The seals each have a pair of sealing lips forming a sealing cavity therebetween, with one pair of sealing lips being sufficiently shaped to contact the inner sleeve, and the other pair of sealing lips being sufficiently shaped to contact the outer sleeve. A fluid fills the sealing cavities to provide a barrier to debris. The seals are bonded to a seal arm positioned adjacent the housing in contact therewith. The secondary seal is positioned between the sleeve and housing, and circumscribing the interface.
