Chain block and load chain
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United States of America Patent
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Mar 7, 2017
Grant Date -
Nov 5, 2015
app pub date -
Nov 26, 2013
filing date -
Nov 30, 2012
priority date (Note) -
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Abstract
A chain block is provided including a load chain which hangs a load, and a load sheave member which is rotatably supported between a first frame and a second frame, around which the load chain is wound, and which has a chain pocket in which the load chain goes, the load chain is made of a steel material having the Rockwell hardness C scale (HRC) of 47 to 51, and the load sheave member is made of a steel material in which at least the chain pocket has the Rockwell hardness C scale (HRC) of 40 to 45.
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