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US 6,347,803 B1Granted
Bicycle with two chain driven differentials
OwnerOscar L. Bergesinventor
Life of this patent
Estimating the term…
Abstract
The invention is directed to a bicycle that has an elevated lower frame surface to allow for continuous pedaling of the bicycle in a tight banked turn. At least one transmission with that has an output rotational speed greater than its input rotational speed is provided. The transmissions and rear wheel are carried by an assembly that is pivotally attached to the bicycle frame and easily detached therefrom. A shock absorber is positioned between the frame and rear wheel assembly to dampen vertical movement there between.
Claims7
A bicycle comprising;
- a frame;
- a steerable front wheel rotatably attached to said frame;
- a first sprocket, said first sprocket carried by said frame and rotatable relative thereto;
- a rear wheel assembly comprising a bracket pivotally attached to said frame and a rear wheel rotatably carried by said bracket;
- a first transmission mounted on said bracket, said first transmission comprising:
- a housing mounted on said bracket
- a first bevel gear secured within said housing
- a second sprocket operatively mounted on said bracket for rotation relative thereto;
- a chain operatively engaging said first and second sprockets;
- a first shaft secured to said second sprocket, extending axially through said second sprocket and rotatable relative thereto;
- a transverse bar fixed to said first shaft and bearing at least one pinon gear in engagement with said first bevel gear;
- a second bevel gear in engagement with said at least one pinon gear;
- a second shaft axially secured at a proximal end to said second bevel gear, rotatable relative to said housing;
- a third sprocket secured to a distal end of said second shaft;
- means to rotate said rear wheel in response to rotation of said third sprocket.
12 more elements
A bicycle comprising;
- a frame;
- a steerable front wheel rotatably attached to said frame;
- a first sprocket, said first sprocket carried by said frame and rotatable relative thereto;
- a rear wheel assembly comprising a bracket pivotally attached to said frame and a rear wheel rotatably carried by said bracket;
- a first transmission mounted at a proximal end of said bracket, said first transmission comprising:
- a first housing mounted on said bracket
- a first bevel gear secured within said housing
- a second sprocket operatively mounted on said bracket for rotation relative thereto;
- a chain operatively engaging said first and second sprockets;
- a first shaft secured to said second sprocket, extending axially through said second sprocket and rotatable relative thereto;
- a transverse bar fixed to said first shaft and bearing at least one pinon gear in engagement with said first bevel gear;
- a second bevel gear in engagement with said at least one pinon gear;
- a second shaft axially secured at a proximal end to said second bevel gear, rotatable relative to said housing;
- a second transmission mounted at a distal end of said bracket, said second transmission comprising:
- a second housing mounted on said bracket;
- a third bevel gear secured within said housing
- a third sprocket operatively mounted on said bracket for rotation relative thereto;
- a chain operatively engaging said second and third sprockets;
- a third shaft secured to said third sprocket, extending axially through said third sprocket and rotatable relative thereto;
- a transverse bar fixed to said second shaft and bearing at least one pinon gear in engagement with said third bevel gear;
- a fourth bevel gear in engagement with said at least one pinon gear;
- a fourth shaft axially secured at a proximal end to said fourth bevel gear, rotatable relative to said housing;
- and
- said third shaft operatively connected to said rear wheel to cause said rear wheel to rotate with said third shaft.
21 more elements
Dependencies are inferred from the claim text.