Patent ID: 8011673
Filing Date: 2011-09-06
Classification: F16J

Abstract:
1. A dynamic seal, comprising: an annular mounting portion; an axially extending portion extending in a first axial direction from said mounting portion and terminating in a first end; a radially extending portion extending radially inwardly from said first end of said axially extending portion and being displaceable in a radially outward direction; a generally conically shaped seal portion extending from an end of said radially extending portion in a direction opposite said first axial direction, said seal portion including a radially inner face and a radially outer face having a region of increased thickness defining a raised bead on said outer face, said raised bead being spaced from a distal end of said seal portion, wherein said radially inner face of said seal portion being adapted to engage a rotary member along a substantial axial length that extends from said distal end to a location at least partially within said region of increased thickness and is provided with at least one groove for retaining oil therein for providing a lubricated interface between the seal portion and the rotary member and providing a pumping function for returning leaked oil to an oil side of the dynamic seal.