| 摘要 |
A fluid seal having a generally annular body of resilient material and defining a sealing edge or lip which is engageable with a machine component. The sealing lip is defined by the junction of two angularly disposed surfaces, and a pumping configuration is applied to one of those surfaces in the form of a series of ribs which extend at an angle relative to the sealing lip. Adjacent ribs extend in substantially opposite directions so that the rib series presents a zig-zag pattern, and the pumping configuration is bi-directional. A pressure or barrier wall is provided on the seal body adjacent to the surface bearing the pumping configuration and in axially spaced relationship to the sealing lip, and during relative rotation of the seal and machine component, that wall surface should deflect fluid onto the pumping configuration so that it will be influenced towards the sealing lip.
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