초록 ▼

An improved two-wheel-drive bicycle having, in certain preferred forms, a chain-driven front-drive mechanism having a gearing arrangement attached to the fork assembly, whereby the gear arrangement, using fixed-axis and variable-axis turning members, transfers rotational power from the drive mechani

An improved two-wheel-drive bicycle having, in certain preferred forms, a chain-driven front-drive mechanism having a gearing arrangement attached to the fork assembly, whereby the gear arrangement, using fixed-axis and variable-axis turning members, transfers rotational power from the drive mechanism along and around the steering axis to the front sprocket. Certain preferred embodiments include particular gearing arrangements and particular ways of getting bicycle power to the fixed-axis turning members,

대표청구항 ▼

1. In a two-wheel-drive bicycle including a frame having front and rear portions and a center portion with upper and lower ends, a fork assembly attached to the front portion and pivotable about a steering axis, a front wheel on the fork assembly and having a front sprocket, a rear wheel on the rear

1. In a two-wheel-drive bicycle including a frame having front and rear portions and a center portion with upper and lower ends, a fork assembly attached to the front portion and pivotable about a steering axis, a front wheel on the fork assembly and having a front sprocket, a rear wheel on the rear portion and having a rear sprocket, and a drive mechanism including a main-drive sprocket at the lower end of the center portion, the improvement comprising a chain-driven front-drive mechanism having a gear arrangement attached to the fork assembly, whereby the gear arrangement transfers rotational power from the drive mechanism along the steering axis to the front sprocket.