Patent ID: 6935649

Claim:
A foldable tricycle comprising: a) a center frame; b) a front frame to which a front wheel is rotatably attached; c) a rear frame to which one or more rear wheels are rotatably attached; d) a four-bar link comprising a first bar, a second bar, a third bar, and a fourth bar; e) a handle bar for steering the foldable tricycle; f) a front wheel fork that rotatably supports the front wheel; g) a fastening member that fastens the handle bar the front wheel fork; and h) a front bearing member that rotatably supports the handle bar and the front wheel fork, and fixed to the front frame; wherein the first bar is integrated with the front frame, wherein the second bar is integrated with the center frame, wherein the third bar is integrated with the rear frame, wherein the fourth bar connects between the first bar and the third bar, wherein the four-bar link moves between a folded position in which the distance between the front wheel and the rear wheels is shortest, and a unfolded position in which the distance between the front wheel and the rear wheels is longest, wherein the fastening member, comprises an annular fastening body into which the handle bar and the front wheel fork are inserted, and a fastening element passes through a handle hole provided in the handle bar, a fork hole provided in the front wheel fork, and a fastening member hole provided in the fastening body.