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US10099904 (B1) - Safety arrangement for a hoist

2018-10-18
专利名称:    US10099904 (B1) - Safety arrangement for a hoist
公开日期:    2018-10-16
专利登记号:    US201715727710 20171009
联系人:    ZAGUROLI JR JAMES [US] + (Zaguroli, Jr., James)
专利内容描述:    

  A hoist security arrangement for avoiding dropping of the load when the chain or cable breaks includes a longer redundant auxiliary chain or cable disposed alongside the main chain or cable and which is raised and lowered synchronously with the slightly shorter main chain or cable so that the main chain or cable normally supports the entire weight of the load. If the main chain or cable breaks, the load drops slightly until the slack in the redundant auxiliary chain or cable is eliminated to hold the load solely by tensioning the auxiliary chain or cable. The extent of slack is set to insure that slight lengthening of the main chain as caused by wear does not result in loading of the auxiliary chain or cable.

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