| 摘要 |
<p>A seal assembly for providing a seal between a pair of components has a sealing ring made of flexible plastics material and a backup ring (70) made of resiliently flexible plastics material being located coaxially of the sealing ring on the side thereof remote from the limbs, the backup ring abutting a f rusto-conical surface (62) of a base of the sealing ring, said frusto-conical surface engaging a corresponding frusto-conical surface (74) of the backup ring, to apply a radial load to the inner periphery of the backup ring urging it towards the outer periphery of the inner component, when an axial load is applied to the sealing ring by exposure of the sealing ring to pressure from the side of the sealing ring to which the limbs extend, a projection (72) on the backup ring engaging an inner periphery of an axially extending annular recess (80) in the outer component, to locate and support the reinforcing ring radially.</p> |
