发明名称 |
Overhead door balancing unit - has several counter weights of which suspension mode during door movement alters |
摘要 |
<p>The door counter weight balancing unit has weight balance constantly in equilibrium and all weights cover approx. a similar distance. Total required weight is split into several e.g. four smaller weights, which during door movement in turn engage in recesses to provide smooth door movement.</p> |
申请公布号 |
NL8901552(A) |
申请公布日期 |
1991.01.16 |
申请号 |
NL19890001552 |
申请日期 |
1989.06.20 |
申请人 |
VAN ASPEREN HOLDING B.V., A 38 TE 2975 BB OTTOLAND. |
发明人 |
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分类号 |
E06B9/62 |
主分类号 |
E06B9/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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