CHAIN-SPROCKET MECHANISM, CHAIN AND SPROCKET
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United States of America Patent
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Issued Date -
Jun 28, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 26, 2005
priority date (Note) -
Abandoned
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Abstract
A chain-sprocket mechanism is disclosed which is highly resistant to corrosion caused by a potential difference arising when metallic materials of different types contact each other. A chain of the chain-sprocket mechanism is structured by coupling a plurality of chain links that consist of pairs of outer plates, pairs of inner plates, bushings fixed to the inner plates and pins inserted through the outer plates, the inner plates and the bushing, which meshes with teeth of a sprocket. The surface of either of the bushing or the teeth is formed of a non-metallic material; thereby, a potential difference does not arise through the contact between the bushing and the teeth. Accordingly, corrosion caused by a potential difference can be avoided, i.e., the corrosion resistance of the chain-sprocket mechanism can be improved.
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