ONE-TRACK FOLDING MULTI-WHEEL VEHICLE Russian patent published in 2009 - IPC B62K15/00 B62K13/02 B62K27/12 

FIELD: transport.

SUBSTANCE: invention relates to folding bicycle-tandems and their couplings. Bicycle comprises front two-wheel part with handlebar (4) and saddle (15), and rear one-wheel part with handlebar (27) and saddle (16) coupled with the former. All open-type frames are identical and folding. Frame of every subsequent rear part is coupled with front part frame via coupler consisting of horizontal (30) and vertical (28) hinges. Axle of horizontal hinge (28) is inclined forward from vertical through certain angle varying from 4 to 9 degrees. Aforesaid coupler comprises front wheel fork (25) resting upon axle (21) of previous part wheel. Fork (25) is rod-jointed to saddle tube of previous part frame and receiver handlebar (27). Sleeve with bearings is fitted on fork top end to make vertical hinge (28). Aforesaid sleeve is jointed, via two tubes (29), to axle of horizontal hinge (30) that is furnished with outer sleeve running in bearings on axle of horizontal hinge (30). Aforesaid sleeve accommodates vertical rod (31) whereto rear part frame tube (32) is rigidly attached.

EFFECT: higher stability, ease of folding.

2 cl, 4 dwg