Patent ID: 8657573

Claim:
A circumferential sealing arrangement comprising: a seal runner operable to be fixed to a structure for concurrent rotation with the structure about an axis; a housing being one of encircling and encircled by said seal runner; a primary seal element at least partially disposed in said housing and having a first surface cooperating with a second surface of said seal runner to form a circumferential seal between said primary seal element and said seal runner; and a secondary seal element positioned between said housing and said primary seal element on a first side of said primary seal element along said axis of rotation, wherein a second side of said primary seal element along said axis of rotation opposite said first side seals against said housing and said secondary seal element generates a biasing force along said axis of rotation urging said second side against said housing, wherein said housing and said primary seal element are at least partially spaced from one another along said axis of rotation on both of said first and second sides.