| 发明名称 |
Door control device having piston assembly with separately formed rack |
| 摘要 |
The piston assembly of a hydraulically controlled door closer has a tubular wall, plugs secured in end portions of the wall and a separate rack secured inside the tubular wall between the plugs by formations on the plugs.
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| 申请公布号 |
US4502180(A) |
申请公布日期 |
1985.03.05 |
| 申请号 |
US19820444528 |
申请日期 |
1982.11.26 |
| 申请人 |
JEBRON LIMITED |
发明人 |
HARRISON, STEPHEN J.;BROWN, PETER E. |
| 分类号 |
E05F3/10;(IPC1-7):E05F3/10 |
主分类号 |
E05F3/10 |
| 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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