Invention Grant
US08167768B2 Eight speed chainless drive for a pedal powered utility tricycle 有权
八速无链驱动踏板动力三轮车

  • Patent Title: Eight speed chainless drive for a pedal powered utility tricycle
  • Patent Title (中): 八速无链驱动踏板动力三轮车
  • Application No.: US12229100
    Application Date: 2008-06-23
  • Publication No.: US08167768B2
    Publication Date: 2012-05-01
  • Inventor: Dirck Ten Broeck Hartmann
  • Applicant: Dirck Ten Broeck Hartmann
  • Main IPC: F16H3/44
  • IPC: F16H3/44
Eight speed chainless drive for a pedal powered utility tricycle
Abstract:
An improved eight speed chainless drive includes a gear case housed within the hub of the driving wheel of a utility tricycle with a drive shaft on the axis of the wheel. Three counter shafts rotatably mounted on ball bearings in the gear case are equally spaced around the drive shaft with six gears fixed on each counter shaft. The two gears on one end of each counter shaft are in constant mesh with two drive gears which can be selectively locked to the drive shaft, and the four gears on the other end are in constant mesh with four gears rotating freely on a driven gear carrier rotatably mounted on a ball bearing on the drive shaft, with provisions for selectively locking any one of the four to the driven gear carrier. Spring-loaded pawls mounted on steel pins in the end of the driven gear carrier engage a ratchet ring fixed in the wheel hub for driving the wheel.
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