| 摘要 |
<p>S P E C I F I C A T I O N BACK-PEDAL BRAKE OPERATOR FOR MULTI-SPEED BICYCLES Inventor: Franklin J. Calderazzo Back-pedal. brake operator for multi-speed bicycles, such as chain-derailer bicycles or gear-shifting bicycles, which can be used to operate the brakes for either the rear wheel or the front wheel or both. The brake operating action is obtained by turning the foot pedals rearwardly a short distance from any position which the pedals may occupy at the instant when the driver wishes to apply braking action, the braking operation being obtained without utilizing the sprocket chain to apply the braking force, and the brakes are automatically released without any "lock-up" effect when the driver starts pedaling forward in the normal manner. Advantageously, the back-pedal operators shown are directly associated with the sprocket assembly as a compact self-con-tained unit integrated with the sprocket assembly and can be installed as original equipment by bicycle manufacturers or can be retrofitted by bicycle shops or owners on existing multi-speed bicycles. The bicycle is permitted to be wheeled freely rearwardly without the brakes becoming applied. The back-pedal brake operator can be adapted for adjustable automatic proportioning of the relative braking efforts to be exerted on the rear and front wheels. This invention also enables dual actuated braking systems to be installed in multi-speed bicycles for either hand or foot operation (or both) of the brakes.</p> |
