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发明名称
Rope ladder
摘要
A rope ladder in which a pair of bolted-together wedge collars and a wedge heart act upon a pair of ropes at each side of each step, to wedge themselves to the rope so that they and their step are locked firmly in place, relative to the rope.
申请公布号
US4177878(A)
申请公布日期
1979.12.11
申请号
US19780933645
申请日期
1978.08.14
申请人
SALVAREZZA, ROBERT M
发明人
SALVAREZZA, ROBERT M
分类号
E06C1/56;(IPC1-7):E06C1/56;E06C7/50
主分类号
E06C1/56
代理机构
代理人
主权项
地址
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