Silent chain
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Oct 16, 2003
app pub date -
Mar 27, 2003
filing date -
Apr 12, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a silent chain comprising guide link plates, connecting pins fixed to pin holes of the guide link plates, and toothed inner link plates, and wherein connecting pins fit loosely in the pin holes of the inner link plates, the base material of the inner link plates is an austenite stainless steel, a martensite stainless steel, a precipitation-hardening steel, a high-carbon chromium bearing steel or an alloy tool steel, and is subjected to heat curing. The inner walls of the pin holes are coated with TiN, CrN, DLC, Al.sub.2O.sub.3, Mo, TiAlN, TiC, TiCN, AlN, Si.sub.3N.sub.4, SiC or NiP. The surface of each connecting pin is coated with a metallic hard coating containing at least one element selected from Cr, V, Nb, Ti, Zr, Ta, Mo and W. The base material of the connecting pins and the base material of the inner link plates are different from each other.
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