发明名称 |
Protection system for automatically openable and closable door |
摘要 |
A protection system for an automatically openable and closable door is provided in which an increase in the driving force produced when the door encounters with a blocking force in the opening operation as caused by some obstacles is detected to stop or reverse the door opening operation, thereby to suppress or reduce any possible accidents.
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申请公布号 |
US4057934(A) |
申请公布日期 |
1977.11.15 |
申请号 |
US19760730853 |
申请日期 |
1976.10.08 |
申请人 |
HITACHI, LTD. |
发明人 |
OKUBO, ISAO;ITO, TAKAYOSHI;MITSUI, NORIHIKO |
分类号 |
B66B13/26;E05F15/00;(IPC1-7):E05F15/20;B66B13/24 |
主分类号 |
B66B13/26 |
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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