| 摘要 |
<p>A sealing unit consisting of two rigid, face-fo-face shields, one of which is fitted with an annular elastomeric sealing member exerting sliding axial sealing action on a track of the other shield; the latter being provided with a flange portion having an annular boss and bearing the aforementioned track, whereas the other shield is provided, integral with the sealing member, with an axial annular rib extending perpendicular to the aforementioned track, towards the aforementioned flange portion and between the aforementioned boss and a projecting lip on the aforementioned elastomeric member.</p> |
