Direct drive bicycle
First Claim
Patent Images
1. 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; and
a 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; and
a 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.
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Abstract
A direct drive bicycle comprising a main frame. Rotatably mounted within the main frame is a variable rate transmission unit having rotatable input and output shafts. Rotatably connected to the main frame is a chain wheel. The chain wheel is mechanically coupled to the input shaft of the transmission unit in a manner wherein the rotation of the chain wheel facilitates the rotation of the input shaft.
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Citations
23 Claims
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1. A direct drive bicycle comprising:
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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; and a 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; and a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A direct drive bicycle comprising:
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a main frame; a variable rate transmission unit mounted within the main frame and having rotatable input and output hubs; a chain wheel rotatably connected to the main frame and mechanically coupled to the input hub in a manner wherein the rotation of the chain wheel facilitates the rotation of the input hub; a rear assembly attached to the main frame and including a pair of swingarms pivotally connected to the main frame at a swingarm pivot; a rear wheel rotatably connected to the rear assembly; and an output chain extending between the output hub and the rear wheel along one of the swingarms above and below the swingarm pivot for mechanically coupling the output hub to the rear wheel in a manner wherein the rotation of the output hub facilitates the rotation of the rear wheel; the spacing of the output chain above the swingarm pivot being substantially equal to the spacing of the output chain below the swingarm pivot. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A direct drive bicycle, comprising:
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a main frame; a variable rate transmission unit mounted within the main frame; a rear assembly attached to the main frame and including at least one swingarm pivotally connected to the main frame at a swingarm pivot; a rear wheel rotatably connected to the rear assembly; and an output chain mechanically coupling the transmission unit to the rear wheel and extending along the swingarm above and below the swingarm pivot. - View Dependent Claims (21, 22, 23)
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Specification