Safety device for use with speed change gear system of a bicycle

Details Safety device for use with speed change gear system of a bicycle Safety device for use with speed change gear system of a bicycle

1978-02-14

1979-11-13

Peters, Jr., Joseph F.

Spring devices

Coil

Plural, one within another

745015R, 280236, F16F 304

Patent

active

041740998

ABSTRACT:
A safety device for use with a speed change gear system for a bicycle which comprises a casing mountable in position to a bicycle frame, a hollow shell member disposed within the casing, a resilient member including at least one first coil spring of large diameter and a second coil spring of a smaller diameter disposed within the shell member in axial alignment and partial overlapping relation with each other. Further, at least three axial spaced slide members are disposed within the shell member so as to be cooperative with the resilient member. A tubular sheath extends in curved position and is connected at one end to a rear derailleur and at the other end to one of the slide members, and a gearshift wire passes through the safety device and the tubular sheath.

REFERENCES:
patent: 3039758 (1962-06-01), Gratzmuller
patent: 3398973 (1968-08-01), Shimano et al.
patent: 3588077 (1971-06-01), Ozaki

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