Endless belt power transmission systems or components – Positive drive pulley or guide roll – And additional coaxial surface for engaging same belt in...
Patent
1995-06-13
1997-03-11
Schoeppel, Roger J.
Endless belt power transmission systems or components
Positive drive pulley or guide roll
And additional coaxial surface for engaging same belt in...
474164, B62M 912
Patent
active
056095368
ABSTRACT:
Disclosed is an improvement on bicycle freewheel gear cluster gear-shifting mechanism having at least at least a large-diameter sprocket wheel, an intermediate-diameter sprocket wheel. The improvement includes a plurality of protrusions provided on the rim of the large-diameter sprocket wheel on the side facing the intermediate-diameter sprocket wheel. The plurality of protrusions can be used to prevent the drive chain from overshooting to the large-diameter sprocket wheel when the drive chain is being shifted from the small-diameter sprocket wheel to the intermediate-diameter sprocket wheel. Additionally, a plurality of protrusions are provided on the rim of the large-diameter sprocket wheel near the gear-up assistant hooking members. The plurality of protrusions can be used to prevent the drive chain from being hooked up by the gear-up assistant hooking members when the drive chain is being shifted from the large-diameter sprocket wheel down to the small-diameter sprocket wheel. Further, a gap is provided between the bottom of the gear-up assistant member and the sprocket wheel capable of imbedding the links of the drive chain so as to allow the drive chain to be shifted smoothly.
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patent: 5458543 (1995-10-01), Kobayashi
Schoeppel Roger J.
Tracer Company, Ltd.
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