发明名称 Device for preventing freezing
摘要 The invention relates to a device in a rainwater drain that tightly seals the drain 1. The device is suspended from the drain cover 2 and comprises, in particular, two plate-shaped parts 5, 6 articulated to one another, which by means of a weight element 9 are forced into a position in which they seal the drain 1 tightly. <IMAGE>
申请公布号 FI95306(B) 申请公布日期 1995.09.29
申请号 FI19940005496 申请日期 1994.11.23
申请人 PROPIPE OY 发明人 PIRTTIKOSKI, MAURI;VAINIONPAEAE, ALPO
分类号 E03F;E03F5/02;(IPC1-7):E03F5/02 主分类号 E03F
代理机构 代理人
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