Patent ID: 7201389

Claim:
A transmission for a human-powered vehicle having a frame and at least one rotating drive element, comprising: a housing secured to the frame, a driving spindle rotatably secured to the housing and having a longitudinal axis, a driven shaft rotatably secured to the housing and having a plurality of longitudinal teeth, and a first driven ring gear slidably disposed on the driving spindle coaxial with the longitudinal axis, the first driven ring gear having a first side-surface and a second side-surface, the first side-surface having a plurality of radial teeth spaced and configured to operably engage the longitudinal teeth of the driven shaft, a biasing member disposed between a first surface of the housing and the first side-surface of the first driven ring gear and urging the radial teeth of the first driven ring gear away from operable engagement with the longitudinal teeth of the driven shaft, and an engagement member disposed between a second surface of the housing and the second side-surface of the first driven ring gear and selectively urging the radial teeth of the first driven ring gear into operable engagement with the longitudinal teeth of the driven shaft.