Patent ID: 7959156

Claim:
A seal assembly for use with a rotating shaft, the seal assembly comprising: an annular seal ring defining an interior member having an axially extending annular surface and a radially extending seal face, the cross sectional area thereof having a center of gravity (CG); and an annular seal ring shell defining an exterior member having a foot portion defining an axially extending engagement surface, said axially extending engagement surface of said foot portion and said axially extending annular surface of said annular seal ring in direct interference fit along an interference diameter D s between said axially extending engagement surface of said foot portion and said axially extending annular surface of said annular seal ring, said seal ring shell further includes a radially extending shin portion connected to said foot portion and located radially outward of said foot portion, said foot portion at its engagement surface has an axial length greater than the axial length of said shin portion, and said engagement surface positioned so as to have a near-zero net moment about said center of gravity due to such engagement.