Patent ID: 11939022
Assignee: nan
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. A folding bicycle comprising:
a first frame section;
a second frame section movably mounted to the first frame section so that the first and second frame sections may be moved relative to each other from an unfolded position to a folded position;
a front wheel mounted to the first frame section;
a rear wheel mounted to the second frame section;
a chainset mounted to the first frame section and comprising one or more chain rings;
a rear hub mounted to the second frame portion;
a chain extending around and between the one or more chain rings and the rear hub;
a chain retainer fixedly mounted to the first frame portion and defining a gap between the chainset and the chain retainer to maintain engagement between the chain and the chainset when the folding bicycle is in the folded configuration;
a rear derailleur comprises a T-shape portion;
wherein the rear derailleur is configured to receive a portion of the chain and provide tension to the chain when the folding bicycle is moved from the unfolded position to the folded position; and
wherein the T-shaped portion of the rear derailleur further comprises an orthogonal projection for engagement with the chain.