Independent pedaling system for tandem bicycles

Land vehicles – Wheeled – Occupant propelled type

Patent

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Details

280259, 280261, B62M 102

Patent

active

059644729

ABSTRACT:
A drive system for a tandem bicycle (10) to allow a captain or a stoker to pedal independently of one another. A unidirectional bearing, e.g., a freewheel assembly (24) is incorporated in a captain crank assembly (20), a stoker crank assembly (100), or both assemblies. In the preferred embodiment of the captain crank assembly, a first adapter plate (36) and a second adapter plate (38) attach the freewheel assembly to a chainring (34). In the preferred embodiment of the stoker crank assembly, a first adapter plate (102) and a second adapter plate (104) attach the freewheel assembly to four chainrings (114, 128, 130, 134). The captain crank assembly is coupled to the stoker crank assembly by a single chain (12), and the stoker crank assembly is coupled to a rear hub (18) of the bicycle by a single chain (14). When the freewheel assembly is incorporated in both the captain crank assembly and the stoker crank assembly, either rider may stop pedaling while the other rider continues to pedal forward.

REFERENCES:
patent: 391490 (1888-10-01), Smith
patent: 2181665 (1939-11-01), Messamore
patent: 3191965 (1965-06-01), Wilkens
patent: 4029326 (1977-06-01), Blow, Jr.
patent: 4108460 (1978-08-01), Silva, Jr.
patent: 4502705 (1985-03-01), Weaver
patent: 4936597 (1990-06-01), Hartmann
patent: 5209507 (1993-05-01), Domenge
patent: 5375865 (1994-12-01), Terry, Sr.
patent: 5426997 (1995-06-01), Brion
patent: 5590894 (1997-01-01), Wen
patent: 5590895 (1997-01-01), Hiramoto
Article; "Bicycle: Back-Pedalling Brake and Firewheel"; volume unknown; pp. 460-465; date unknown.
Article; "Bicycle"; volume unknown; pp. 280-284; date unknown.

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