Guide sprocket wheel, more particularly for the gear shift devices of bicycles and the like
AssigneeLe Simplex
InventorHenri Juy
Life of this patent
Estimating the term…
Abstract
Guide sprocket wheel comprising a plurality of teeth corresponding to the pitch of the chain, the tops of the teeth being chamfered on bevelled on the periphery and on the lateral faces of the wheel. The angles of incidence of the teeth are cut off by further chamfers or bevels around the profile of the teeth, which gradually reduce the thickness of the teeth from the base to the tops thereof.
Claims7
A guide sprocket wheel adapted for engagement with the rolls of a chain, comprising a plurality of teeth corresponding to the pitch of the chain to be engaged, the tops of the teeth being chamfered or bevelled on the periphery and on the lateral faces of the wheel;
- wherein on the lateral faces of the wheel, the angles formed on the tops of the teeth and on the side of the recesses between the teeth are cut off by further bevels around the profile of the teeth, gradually reducing the thickness of the teeth from the base to the tops thereof;
- the bevels extending between a central peripheral bevel to the bottom of the recesses between two successive teeth such that the thickness of the wheel is not modified at the bottom of the recesses of the teeth.
Dependencies are inferred from the claim text.