Endless belt power transmission systems or components – Positive drive pulley or guide roll – And additional coaxial surface for engaging same belt in...
Patent
1992-03-20
1993-03-16
Bui, Thuy M.
Endless belt power transmission systems or components
Positive drive pulley or guide roll
And additional coaxial surface for engaging same belt in...
F16H 906
Patent
active
051940515
ABSTRACT:
A multistep sprocket wheel unit having a plurality of sprocket wheels in ring form; a boss having an axis, a front end face and a rear end face; and a plurality of support arms extending radially outwardly from outer peripheries of the boss and inclined toward the rear end face with respect to the axis. The support arms are arranged around the boss, and each defines a plurality of stepped surfaces formed on an inclined portion thereof opposed to the front end face. The stepped surfaces include vertical surfaces perpendicular to the axis and horizontal surfaces parallel to the axis. Adjacent ones of the vertical surfaces are formed with a predetermined pitch for use as sprocket wheel positioning surfaces. Where the vertical surfaces are formed with a pitch corresponding to a mounting pitch of the sprocket wheels, the sprocket wheels may simply be placed with side surfaces thereof contacting and fixed to the positioning surfaces to obtain an accurate mounting pitch.
REFERENCES:
patent: 4047603 (1977-09-01), Ozaki
patent: 4324323 (1982-04-01), Campagnolo
Bui Thuy M.
Shimano Inc.
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