发明名称 Extensible boom lift
摘要 A workpiece lift including a pivotable boom with a pivot end that moves horizontally as the load end of the boom is raised and lowered, allowing the load end to move along a substantially vertical line. In a preferred embodiment the load end of the boom terminates in a workpiece arm which supports a workpiece and which extends downwardly from the load end of the boom so that the workpiece may be lifted upwardly and outwardly in an arc.
申请公布号 US4162873(A) 申请公布日期 1979.07.31
申请号 US19780873597 申请日期 1978.01.30
申请人 SMITH, RAYMOND E JR 发明人 SMITH, RAYMOND E JR
分类号 B66F3/22;B66F7/08;B66F9/06;E02F3/34;E04G1/22;(IPC1-7):E02F3/70 主分类号 B66F3/22
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