Sprocket with wear limit indication

Details Sprocket with wear limit indication Sprocket with wear limit indication

2006-03-28

2006-03-28

Johnson, Vicky A. (Department: 3682)

Endless belt power transmission systems or components

Positive drive pulley or guide roll

Reexamination Certificate

active

07018313

ABSTRACT:
In a sprocket for use with a roller chain, a wear limit marker, having a different color from that of the base material of the sprocket, is provided on side surface of a sprocket tooth adjacent to a keyway. The wear limit marker is disposed on an imaginary line extending in the direction of the pressure angle, and is located in a hole or groove provided in a side surface of the sprocket tooth. The marker makes it possible to determine easily and reliably whether or not wear at the location at which wear of a sprocket tooth proceeds most rapidly is within a predetermined limit, and the location of the marker makes it possible to evaluate wear conditions even when the sprocket is installed in a machine.

REFERENCES:
patent: 5348515 (1994-09-01), Miller
patent: 5980406 (1999-11-01), Mott et al.
patent: 3-78153 (1991-08-01), None
patent: 05286316 (1993-11-01), None

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