| 摘要 |
<p>1. A gas and liquid-tight pole grommet for storage batteries having a housing made of plastic, predominantly of polyethylene or polypropylene, especially for lead-acid storage batteries, comprising a) a cup-shaped configuration of the plastic cover (2) in the region of a through-opening (3) for the pole (1), b) if applicable, a lower layer (5) made of rigid casting material on the cup bottom (4), c) a middle layer (6, 17) of thermoplastic, permanently elastic, acidproof plastic or of bitumen, wax, resin, grease, d) an upper layer (7, 23) contiguous therewith and made of rigid casting material on top of said middle layer (6, 17), and e) a free chamber (14, 22) sealed with respect to the outside and being in communication with said middle layer (6, 17).</p> |
