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1. 发明授权

US4304394A Log lifting device 失效
标题翻译：升降装置
公开(公告)号：US4304394A
公开(公告)日：1981-12-08
申请号：US183227
申请日：1980-09-02
申请人： Harold N. O'Hara , John E. Watson
发明人： Harold N. O'Hara , John E. Watson
IPC分类号： B27B17/00 , B66F13/00 , B66F19/00
CPC分类号： B27B17/0075 , B66F13/00 , B66F19/00 , Y10S254/01
摘要： A log lifting device is described that includes an upstanding post with an attached flexible strand. The flexible strand, such as a chain, releasably connects the post to a jack. Guide members on the post cause the flexible strand to extend generally parallel to the post for a substantial portion of the length of the post. The flexible strand may include a thin, rigid extension at one end to enable the strand to be threaded under a log to be lifted. The end passed under the log to be lifted is then attached to a jack. The log is raised upwardly generally parallel the length of the support member in response to an upward force applied by the jack.
摘要翻译：描述了一种升降装置，其包括具有附接的柔性线的直立柱。诸如链条的柔性线可释放地将柱连接到千斤顶。柱上的引导构件使得柔性线在桩的长度的大部分上大致平行于柱延伸。柔性股线可以包括在一端的薄的刚性延伸部，以使股线能够在原木下方被螺纹提升。然后将通过在待升起的原木下的一端连接到千斤顶。响应于由千斤顶施加的向上的力，原木大体平行于支撑构件的长度上升。

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