Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Orbit braked
Patent
1997-04-14
1999-04-20
Wright, Dirk
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Orbit braked
475320, 280238, F16H 344
Patent
active
058953361
ABSTRACT:
An apparatus for changing power direction for a bicycle is provided. The apparatus for changing power direction roughly including a shaft housing, a change ring, a carrier, a sun gear and a sprocket cap is located between a pedal shaft and a driving sprocket. The shaft housing supports the rotating pedal shaft and controls the carrier by using a plurality of pawls to be released from and inserted into a plurality of openings formed at the inside of a rim of a right cap of the shaft housing when pedaling rearward. The change ring releases and inserts the pawls from and into the shaft housing when pedaling rearward, and the carrier having a first ratchet and a second ratchet at the outside and inside of a left portion thereof, respectively, and a plurality of planetary gears to be rotatably set at a right portion maintains or changes the direction of power from the pedal shaft, thereby transmitting the power to a driving sprocket. The sun gear transmits the driving force of the pedal shaft to the carrier while being coupled with the pedal shaft. Also, the sprocket cap having a gear at the right of the inside of the rim thereof receives the power from the carrier to travel the bicycle forward at all times regardless of forward and backward pedaling directions. Therefore, the bicycle travels forward when pedaling forward and rearward in the state where the apparatus for changing power direction is installed to the bicycle. Also, an idling may occur if required when pedaling rearward in the state where the apparatus for changing power direction is installed to the bicycle.
REFERENCES:
patent: 504168 (1893-08-01), Marris
patent: 587787 (1897-08-01), Buckler
patent: 5435583 (1995-07-01), Foster, Jr.
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