Conveyance system

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

Reexamination Certificate

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Details

C474S154000, C474S155000, C474S156000, C474S160000, C474S202000, C474S203000, C474S206000, C474S209000

Reexamination Certificate

active

07442139

ABSTRACT:
In a slat conveyor, slats for supporting conveyed articles and personnel extend between two side-by-side, spaced, endless roller chains engaged with driving sprockets at one end of the conveying path and driven sprockets at the other end. At a location radially outward from the pitch circle, the distance between the front surface of the sprocket teeth to the tooth center line is at least as great as the distance from the centerline to the front surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, and the root diameter is smaller than the root diameter according to ISO standards.

REFERENCES:
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patent: 4492030 (1985-01-01), Beerens
patent: 4856719 (1989-08-01), Hallez
patent: 5170882 (1992-12-01), Tekathen et al.
patent: 5362278 (1994-11-01), Bergles et al.
patent: 5848948 (1998-12-01), Allen
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patent: 6375589 (2002-04-01), Makino et al.
patent: 2004/0002402 (2004-01-01), Nakamura
patent: 1493 946 (2005-01-01), None
patent: 5-231500 (1993-09-01), None
patent: 2003-165605 (2003-06-01), None
patent: 2004-036639 (2004-02-01), None
U.S. Appl. No. 11/269,002, Aizoh Kubo et al.
U.S. Appl. No. 11/264,317, Masatoshi Sonoda.
International Standard, Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts, International Organization For Standardization, ISO 286-2; First Edition Jun. 1, 1988.

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