Motorized shift assist control apparatus for bicycle transmissio

Details Motorized shift assist control apparatus for bicycle transmissio Motorized shift assist control apparatus for bicycle transmissio

1997-09-18

1999-10-19

Ta, Khoi Q.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural drive ratios other than unity

475298, F16H 344

Patent

active

059679379

ABSTRACT:
A shift control device for a bicycle transmission having a plurality of transmission paths includes a hub shaft, a driver rotatably mounted around the hub shaft for rotating in first and second directions, wherein the first direction is opposite the second direction, a transmission path selecting member for selecting among the plurality of transmission paths, and a reverse motion mechanism coupled to the driver for converting rotation of the driver in the first direction into motion in the second direction. An operation mechanism operates the transmission path selecting member, wherein the operation mechanism includes a first drive force takeoff component which moves between a first state and a second state. The first drive force takeoff component engages the reverse motion mechanism when the first drive force takeoff component is in the first state for communicating motion of the reverse motion mechanism in the second direction to the transmission path selecting member, and the first drive force takeoff component is disengaged from the reverse motion mechanism when the first drive force takeoff component is in the second state.

REFERENCES:
patent: 3803947 (1974-04-01), Hillyer
patent: 4240533 (1980-12-01), Fukui
patent: 4276973 (1981-07-01), Fukui
patent: 4651853 (1987-03-01), Bergles
patent: 5078664 (1992-01-01), Nagano
patent: 5562563 (1996-10-01), Shoge

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