A mechanical face-type seal assembly which provides substantially annular, axially biasing force along the annular seal created between the rotary seal face and the stationary seal face of the seal assembly. The device preferably employs a substantially annular segment of interconnected canted coils...http://www.google.com.au/patents/US6186510?utm_source=gb-gplus-sharePatent US6186510 - Mechanical contact bearing seal
