Transmission chain
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United States of America Patent
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Issued Date -
May 26, 2005
app pub date -
Oct 6, 2004
filing date -
Oct 7, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An inverted tooth transmission chain with articulating link plates has improved wear resistance and life expectancy. The articulating link plates are blanked from steel having an aluminium content of 0.01% to 0.08% by weight and a grain size number of at least 8 ASTM. The link plates are then carburised by heating them to a temperature in the range 800.degree. C. to 1000.degree. C. for a period of between 10 to 60 minutes in a conventional carburising atmosphere including, for example, methane or propane. The link plates are then quenched or austempered in an oil or salt bath. The final hardness of the carburised link plate is in the region of 600 to 700 Hv (Vickers hardness value).
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