Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1975-05-30
1976-06-01
Scott, Samuel
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
74242, F16H 1100, F16H 900, F16H 1108
Patent
active
039600254
ABSTRACT:
Push flange construction of a pivotal roller system of a speed change mechanism for a bicycle, the pivotal roller system having a pair of spaced flanges with at least one rotatable sprocket mounted therebetween on which a chain passes and is wound on a pinion of a gear cluster on the hub of the rear wheel of the bicycle. One of the flanges is a push flange operative to push the chain onto the pinions in the course of speed change when the roller system is transversely displaced, this flange including a peripheral prolongation at that extremity of the flange closest to the pinions of the gear cluster. The prolongation extends over a wide sector whose angular length is such as to allow contact with the chain and pushing thereof at a position closest to the pinions whatever the angular position of the roller system. The surface of the prolongation facing the chain is provided along the length of the sector with a wide profiled chamfer for contacting the chain. The prolongation can be integrally formed with the one flange as a one-piece body or it can be made as a detachable element which can be mounted on a conventional flange.
REFERENCES:
patent: 3803933 (1974-04-01), Huret et al.
Burke A. Russell
Scott Samuel
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