SEAL

摘要

A rotary seal between first and second concentric surfaces (12, 14), comprises a carrier (18) and a sealing ring (16) secured at a first edge to the carrier (18) so that the sealing ring (16) extends therefrom and is deflected by and seals with said second concentric surface (14), characterised in that the carrier (18) has a sealing member (20) attached to it to seal with said first concentric surface (20). The second edge of the sealing ring (16) may be deflected inwards or outwards of the sealing member (20). The sealing rings (16) may be provided extending in opposite directions. Alternatively, a rotary seal forms a seal between the end of a shaft (212) and an adjacent surface (214) which extends laterally of the shaft axis, the rotary seal comprising a carrier (216) adapted to fit the end of the shaft (212) and a sealing ring (218) secured at a first edge to the carrier (216) so that the sealing ring (218) extends therefrom and is deflected by and seals with said adjacent surface (214), characterised in that said first edge of the sealing ring (218) is located around the circumference of the shaft (212) and extends towards said adjacent surface (214).