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TREE LIMB ROPE BRAKE
专利权人:
JAMES P. MCDERMOTT
发明人:
JAMES P. MCDERMOTT
申请号:
US15874638
公开号:
US20180199523A1
申请日:
2018.01.18
申请国别(地区):
US
年份:
2018
代理人:
摘要:
A rope brake is provided for controlled lowering of a branch or limb cut from a tree by a person holding one end of the rope. The rope brake includes a drum mounted to a back plate. The back plate is mounted to the tree. The rope for lowering the branch or limb is threaded through guides on the drum and wrapped around the drum one, two or three times. One end of the rope is tied to the branch to be cut and the other end is held by the operator. When the branch is cut from the tree, the tension on the rope supplied by the operator controls the friction between the rope and the drum, such that the branch can be safely lowered in a controlled manner.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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