发明名称 Unitary body swiveling hoist ring and method of manufacture
摘要 An improved hoist ring and method of manufacturing a hoist ring having a generally U shaped ring member and two substantially parallel legs. A pair of apertures communicated through the parallel legs and rotationally engage a pair of elongated shoulders protruding from a body member. A taper in the upper wall surface of the apertures allows the ring member to be inserted over the shoulders and then bent to a U shape to form the device and also allows for the assembly of the device from two unitary structures.
申请公布号 US6749237(B1) 申请公布日期 2004.06.15
申请号 US20020107374 申请日期 2002.03.26
申请人 MA SHU LAN 发明人 MA SHU LAN
分类号 B66C1/66;F16G15/06;F16G15/08;(IPC1-7):B66C1/00 主分类号 B66C1/66
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