| 摘要 |
Cartridge with a motor shaft, characterised in that the bearings 12, 13, 14 are arranged in a case 7 engaged in the housing 5, the bearings 12 13, 14 being maintained, on the one hand, against a shoulder 19 of the case 7 by a ring 20 carried by the case and, on the other hand, against a collar 3a of the shaft 3 by a nut 26 screwed on a thread 3g of the shaft which is equipped with at least one deflector 33, 34, delimiting a labyrinth with spaces of variable diameter and small cross-section, within the casing via a channel 38 in a chamber 42 of a cap 36 linked to the case 7 and separated from the shaft by a bore 36c of very small cross-section. <IMAGE>
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