发明名称 Tree handling device
摘要 A device for use by arborists for handling heavy tree limbs and main stems including a base for attachment to the tree trunk and a cylindrical member for receiving a rope mounted on the base. In an alternate form of the invention, the cylindrical member is mounted on an axle which is attached to the base and ratchets permit selective rotation of the cylindrical member in at least one direction. In still another form of the invention, a lever is attached to the cylinder to give an operator great mechanical advantage so that the device may be used to raise heavy loads by turning the cylindrical member.
申请公布号 US4239188(A) 申请公布日期 1980.12.16
申请号 US19790034463 申请日期 1979.04.30
申请人 HOBBS, EDWIN L 发明人 HOBBS, EDWIN L
分类号 B66D1/60;(IPC1-7):B66C23/60 主分类号 B66D1/60
代理机构 代理人
主权项
地址