Abstract: An improved locking hinge for use in a folding bicycle is equipped with a lever arm which is in pivotal connection to a locking hook at the bottom end thereof. The locking hook also pivotally mounted onto the handlebar of a bicycle has a retaining recess which is made to engage with a locking pin mounted onto the steering stem of the bicycle so as to get a folding bicycle in use as long as the lever arm is pushed toward the erected handlebar which is put in linear alignment with the steering stem already. Besides, a securing spring plate is used to retain the lever arm in place so as to prevent the locking hook from disengagement from the locking pin as the bicycle is in use. To get the bicycle folded, the securing spring plate is lifted upwardly to permit the lever arm to pried outwardly, resulting in the locking hook disengaged with the locking pin. Then the handlebar and the steering stem are separated with each other and put side by side in a folding manner.

Abstract: An auxiliary driving mechanism associated with the front wheel of a bicycle is equipped with a pair of pneumatically actuated cylinders secured in place by a pair of spaced triangular fixing brackets and connected to the handlebar of the bicycle pivotally operated up and down by a rider's hands so as to actuate the cylinders in driving connection to the shaft of the front wheel thereof by way of sprockets and transmission devices. The pivotal handlebar of the bicycle is also coupled to the front fork by way of a head tube and a handlebar stem so that the rider can also steer the bicycle with ease and safety. Moreover, the pneumatic cylinders can also be used as pumps for inlation of the tires when necessary with the help of extension tubes.