Patent ID: 6029990
Filing Date: 2000-02-29
Classification: B62K,B62M

Abstract:
A direct drive bicycle comprising:a main frame;a rear assembly attached to the main frame and comprising:a pair of swing arms pivotally connected to the main frame;a pair of drop-outs disposed on respective ones of the swingarms;a rear wheel rotatable connected to the drop-outs;a bell crank pivotally connected to the main frame;a shock absorber pivotally connected to and extending between the bell crank and the main frame; anda pair of chain stays pivotally connected to and extending between the bell crank and respective ones of the drop-outs;a variable rate transmission unit mounted within the main frame and having rotatable input and output hubs, the output hub being mechanically coupled to the rear wheel in a manner wherein the rotation of the output hub facilitates the rotation of the rear wheel; anda chain wheel rotatably connected to the main frame, said chain wheel being mechanically coupled to the input hub in a manner wherein the rotation of the chain wheel facilitates the rotation of the input hub.