Sprocket assembly and a method for preventing ingress of dirt in a bearing of a sprocket assembly
AssigneeCeramicSpeed Sport A/S
InventorsJacob Csizmadia, Anders Pedersen
Life of this patent
Estimating the term…
Abstract
A sprocket assembly includes a sprocket including a center orifice and a bearing located in the center orifice with an outer part of the bearing fixed in relation to the sprocket. The sprocket assembly also includes a dust cover fixed in relation to an inner part of the bearing. An outer cover diameter of the dust cover is bigger than an outer bearing diameter of the bearing, so that an outer periphery of the dust cover extends radially past the outer part. The sprocket also includes an impeller arranged at the outer periphery of the dust cover. The impeller is fixed in relation to the sprocket.
Claims15
A sprocket assembly comprising,
- a sprocket including a center orifice,
- a bearing located in said center orifice with an outer part of said bearing fixed in relation to said sprocket,
- a dust cover fixed in relation to an inner part of said bearing, wherein an outer cover diameter of said dust cover is bigger than an outer bearing diameter of said bearing, so that an outer periphery of said dust cover is extending radially past said outer part, and
- an impeller arranged at said outer periphery of said dust cover, wherein said impeller is fixed in relation to said sprocket.
A method for preventing ingress of dirt in a bearing of a sprocket assembly, said method comprises steps of:
- placing said bearing in a center orifice of a sprocket of said sprocket assembly,
- fixating an outer part of said bearing in relation to said sprocket,
- fixating a dust cover of said sprocket assembly in relation to an inner part of said bearing, wherein an outer cover diameter of said dust cover is bigger than an outer bearing diameter of said bearing, so that said dust cover is extending radially past said outer part,
- fixating an impeller of said sprocket assembly in relation to said sprocket at said outer cover diameter of said dust cover, and
- rotating said sprocket and said impeller, so that said impeller deflects dirt away from said sprocket.
A pulley wheel system of a derailleur system for a bicycle, the pulley wheel system comprising:
- a sprocket assembly including:
- a sprocket including a center orifice,
- a bearing located in the center orifice with an outer part of the bearing fixed in relation to the sprocket,
- a dust cover fixed in relation to an inner part of the bearing, an outer cover diameter of the dust cover being bigger than an outer bearing diameter of the bearing such that an outer periphery of the dust cover extends radially past the outer part of the bearing, and
- an impeller arranged at the outer periphery of the dust cover, the impeller being fixed in relation to the sprocket.
Dependencies are inferred from the claim text.