Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1974-11-08
1976-06-22
Scott, Samuel
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
74217B, 74611, F16H 722, F16H 718
Patent
active
039643301
ABSTRACT:
In a protective device to be incorporated in a bicycle rear derailleur for preventing a drive chain from being unexpectedly disengaged with the smallest sprocket wheel, the device has an internally threaded cylindrical portion and a substantially flat flange portion extending integrally from one end of said cylindrical portion, said cylindrical portion being screwable, in place of a lock nut, onto a standard mounting bolt which is employed in the known rear derailleurs for connecting a shifter body to a hook-shaped bracket; said flange portion being designed so that it extends, when incorporated with the rear derailleur, in parallel and slightly spaced with the opposite surface of the smallest sprocket wheel of a multi-stage freel wheel assembly; and by means of the smooth outer surface of said flange portion a desired chain fall prevention is attained.
REFERENCES:
patent: 3184993 (1965-05-01), Swenson
Wheel Goods Corp., "The Handbook of Cycl-ology," 1973, 6th edition, p. 56.
Burke A. Russell
Maeda Industries, Ltd.
Scott Samuel
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