| 摘要 |
A face seal, such as for a water pump in the cooling system of an internal combustion engine, comprises a rigid sealing ring carried by the free end of a moulded elastomeric sleeve on a mounting cup, the sleeve having at about its mid-length a circumferential flexible junction, defined by a surrounding groove with a contractile spring seated therein, and the sleeve being geometrically equivalent to an axially opposed pair of frusto-conical parts forming a toggle system which, under the pressure of sealed fluid, exerts a balancing axial bearing load on the sealing ring.
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