| 发明名称 |
Door control device |
| 摘要 |
A door closing device comprises a piston (12) having at one end a seal (21) which seals the interface between the piston and a housing (10). The seal (21) also acts as a one-way valve and carries a pressure relief valve (37).
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| 申请公布号 |
US5487206(A) |
申请公布日期 |
1996.01.30 |
| 申请号 |
US19940177917 |
申请日期 |
1994.01.06 |
| 申请人 |
JERBRON LIMITED |
发明人 |
BROWN, PETER E.;HARRISON, STEPHEN J. |
| 分类号 |
E05F3/12;(IPC1-7):E05F3/10 |
主分类号 |
E05F3/12 |
| 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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