Direct drive bicycle
First Claim
Patent Images
1. A direct drive bicycle comprising:
- a bicycle frame having a seat tube which defines opposed ends and a pivoting rear assembly which extends rearwardly from the seat tube;
a rear wheel rotatably connected to the rear assembly;
a housing attached to one of the ends of the seat tube and disposed forwardly of the rear wheel;
a variable rate transmission unit rotatably mounted within the housing, the transmission unit having input and output shafts which are simultaneously rotatable at differing rotational speeds;
a crank axle rotatably mounted within the housing; and
a chain wheel attached to the crank axle;
said chain wheel being mechanically coupled to the input shaft and the output shaft being mechanically coupled to the rear wheel such that the rotation of the chain wheel facilitates the rotation of the rear wheel.
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Accused Products
Abstract
A direct drive bicycle comprising a bicycle frame having a housing attached thereto. Rotatably mounted within the housing is a variable rate transmission unit having rotatable input and output shafts. Rotatably connected to the housing 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.
163 Citations
13 Claims
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1. A direct drive bicycle comprising:
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a bicycle frame having a seat tube which defines opposed ends and a pivoting rear assembly which extends rearwardly from the seat tube; a rear wheel rotatably connected to the rear assembly; a housing attached to one of the ends of the seat tube and disposed forwardly of the rear wheel; a variable rate transmission unit rotatably mounted within the housing, the transmission unit having input and output shafts which are simultaneously rotatable at differing rotational speeds; a crank axle rotatably mounted within the housing; and a chain wheel attached to the crank axle; said chain wheel being mechanically coupled to the input shaft and the output shaft being mechanically coupled to the rear wheel such that the rotation of the chain wheel facilitates the rotation of the rear wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A direct drive bicycle comprising:
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a bicycle frame having a seat tube which defines opposed ends and a rear assembly which extends rearwardly from the seat tube; a rear wheel rotatably connected to the rear assembly; a housing attached to one of the ends of the seat tube and disposed forwardly of the rear wheel; a variable rate transmission unit rotatably mounted within the housing, the transmission unit having input and output shafts which are simultaneously rotatable at differing rotational speeds; a crank axle rotatably mounted within the housing; and a chain wheel attached to the crank axle; the chain wheel being mechanically coupled to the input shaft and the output shaft being mechanically coupled to the rear wheel such that the rotation of the chain wheel facilitates the rotation of the rear wheel.
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11. A direct drive bicycle comprising:
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a bicycle frame including a seat tube which defines opposed ends and a rear assembly which extends rearwardly from the seat tube; a rear wheel rotatably connected to the rear assembly; a housing directly attached to one of the ends of the seat tube and disposed forwardly of the rear wheel, the housing including a transmission bore which extends laterally therethrough; and a variable rate transmission unit rotatably mounted within the transmission bore of the housing via at least one bearing member. - View Dependent Claims (12, 13)
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Specification