Sprocket for a silent chain and method of manufacturing the...

Endless belt power transmission systems or components – Positive drive pulley or guide roll

Reexamination Certificate

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Reexamination Certificate

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07097580

ABSTRACT:
A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hardness greater than the central portion.

REFERENCES:
patent: 1870801 (1932-08-01), Engstrom
patent: 2179967 (1939-11-01), Thompson
patent: 4472164 (1984-09-01), Pusch et al.
patent: 5213636 (1993-05-01), Akers et al.
patent: 5711187 (1998-01-01), Cole et al.
patent: 5829850 (1998-11-01), Ketting et al.
patent: 6071204 (2000-06-01), Jefferies et al.
patent: 6168754 (2001-01-01), Woolf et al.
patent: 6899846 (2005-05-01), Woolf
patent: 2002/0193194 (2002-12-01), Okabe

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