发明名称 Automatic safety latch lift hook unit
摘要 A lift hook unit is described having a hook element swiveled to a supporting yoke; the hook element has a safety latch which is automatically movable from a normal open position to a closed position upon loading of the hook and is automatically returnable to open condition upon relaxing the load. A manual handle enables manual movement and guidance of the hook element in various directions as needed.
申请公布号 US4039219(A) 申请公布日期 1977.08.02
申请号 US19760698881 申请日期 1976.06.23
申请人 CHICAGO PNEUMATIC TOOL COMPANY 发明人 BUGMAN, MICHAEL
分类号 B66C1/36;(IPC1-7):B66C1/36 主分类号 B66C1/36
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