发明名称 |
Ladder top walk through extensions |
摘要 |
Walk through ladder extensions are provided to attach to the upper ends of ladder side rails, and define a wide unobstructed space between them. The extensions can be gripped by a user to steady the user as the user moves onto a roof of a building against which the ladder is placed.
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申请公布号 |
US2005236227(A1) |
申请公布日期 |
2005.10.27 |
申请号 |
US20050042741 |
申请日期 |
2005.01.25 |
申请人 |
CLARK BRUCE D;FEIK FREDERICK G |
发明人 |
CLARK BRUCE D.;FEIK FREDERICK G. |
分类号 |
E06C7/18;E06C7/42;(IPC1-7):E06C7/42 |
主分类号 |
E06C7/18 |
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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