Friction Wheel Patents (Class 116/61)
  • Patent number: 4875885
    Abstract: A noisemaker for bicycles and the like includes a housing having a shoulder and a resonator plate seated in the housing on the shoulder. The resonator plate is biased against the shoulder by a compressed spring. A resonator chamber extends from the shoulder, away from the housing. Use of a camming mechanism raises the resonator plate above the shoulder and releases same as it passes so that the resonator plate is urged back against the shoulder by the spring and a surface-engaging noise and air compression noise are directed into the resonator chamber to simulate the sound commonly associated with a vehicle engine.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: October 24, 1989
    Inventor: Horton Johnson