Patent ID: 6719310
Filing Date: 2004-04-13
Classification: B62K,B62M

Abstract:
A self-movable vehicle, comprising a head board, a head tube secured on a front end of the head board, a steering tube pivotally mounted on the head tube and having a lower end provided with a front wheel, two rear frames each having a front end pivotally mounted on a rear end of the head board, two tread boards each pivotally mounted on a top face of a rear end of a respective one of the two rear frames, and two rear wheel sets each pivotally mounted on a bottom face of the rear end of a respective one of the two rear frames, wherein:the self-movable vehicle further comprises two arcuate toothed plates meshing with each other and each secured on the front end of a respective one of the two rear frames to pivot therewith, and a tensile spring mounted between the two rear frames; and each of the two rear frames has a bottom face formed with an arcuate slot, each of the two tread boards has a bottom face protruded with a shaft extended through each of the two rear frames, a pivot plate is secured on the shaft of each of the two tread boards, the pivot plate has a first side formed with a bent portion slidably mounted in the arcuate slot of each of the two rear frames and a second side secured with two linking members each having a free end formed with a bent end which is secured on each of the two rear wheel sets.