| 摘要 |
A seal and bleed valve unit (1, 20) for electric batteries comprising: a tubular neck (2, 21) associated to the cover (C) of the battery and adapted to put the outside in communication with bleed ducts (S) made in the cover (C); an elastic cap (3, 23) consisting of a tubular body (4) closed by a bottom (5) and removably coupled to the outside of the tubular neck (2, 21). The tubular neck (2, 21) ends with a thinner collar (6, 22) relative to the outer surface (2a) of the tubular neck (2, 21), said collar cooperating with the inner surface (7) of the cap (3, 23) to define an annular chamber (8, 24).
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