Fixed gear bicycle hub
OwnerScott Hanseninventor
Life of this patent
Estimating the term…
Abstract
A fixed bicycle hub assembly for changing (removing and replacing) the hub (rear) gear on a fixed gear bicycle hub so that another gear can be used; comprising a chain, a molded unitary hub having molded keys protruding from the hubs faces and threaded bolt holes on both faces, a single speed chain disc received by the molded unitary hub having a cog ring comprising integral keyways and bolt holes, a plurality of locking keys and arcuate keyways and fastening bolts for changing (removing and replacing) the hub (rear) gear on a fixed gear bicycle hub so that another gear can be used.
Claims9
In a fixed gear bicycle having a frame and a chain drive sprocket, a hub assembly for use with conventional tools for changing a rear sprocket gear so that another gear can be employed comprising:
- a hub axle having a center axis extending between a first frame mounting end and a second frame mounting end;
- a chain extending between a front chain drive sprocket and a rear cog comprising a sprocket gear;
- a hub unit having a hub shell of unitary molded construction having two hub faces comprising;
- threaded bolt holes on both faces;
- a plurality of molded arcuate locking keys protruding from each of the hub faces associated with locking keyways of a chain disc;
- a rear cog comprising a single speed chain disc to be received by a selected hub face of the hub shell, comprising;
- A plurality of integral arcuate locking keyways;
- non-threaded bolt holes;
- and
- having a peripheral cog ring for receiving the drive chain;
- and
- a plurality of cog bolts in association with the non-threaded bolt holes;
- wherein said cog bolts can be employed for changing (removing and replacing) the rear sprocket gear with standard tools so that another gear can be used.
A method for changing a fixed bicycle gear employing a plurality of locking keys and arcuate keyways and fastening bolts for changing (removing and replacing) the hub (rear) gear on a fixed gear bicycle hub so that another gear can be used comprising the steps of
- A) employing a 6 mm Allen (hex key wrench), loosen the two axle bolts and remove the bicycle wheel from the bicycle dropouts of the frame;
- B) employing a T25 (torx wrench) (star wrench) completely remove the cog retaining bolts;
- C) loft cog off of the “Knuckles”;
- D) place new cog over the “Knuckles” so that the bolt holes line up;
- and
- E) insert the torx (star) bolts and tighten the bolts a couple of turns at a time to insure the cogs go on evenly.
A bicycle hub assembly with freewheel comprising:
- A) a hub axle having a center axis extending between a first frame mounting end and a second frame mounting end;
- B) a hub unit having a hub body, a first spoke mounting portion located adjacent a first end of said hub body, a second spoke mounting portion located adjacent a second end of said hub body and an interior passageway extending through said hub body with said hub axle being rotatably supported therein;
- C) a freewheel operatively coupled to said first end of said hub body, said freewheel including a driving member, a driven member and a unidirectional transmission mechanism, said driven member is non-rotatably coupled to said hub body, said unidirectional transmission mechanism being operatively coupled between said driving member and said driven member;
- and a sprocket assembly including a base portion with a unitary cog said base portion, said base portion being coupled to said driving member of said freewheel, said base portion of said sprocket assembly having an inner portion recessed within a recess of said first spoke mounting portion.
Dependencies are inferred from the claim text.