Method for manufacturing a single chainring
AssigneeSr Suntour Inc.
InventorYoshihisa Iwasaki
Life of this patent
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Abstract
A method for manufacturing a single chainring (1) which prevents a chain (3) from easily falling off and is low-cost is provided. The method for manufacturing a single chainring (1) comprises a step of forming neutral teeth (A) having a thickness allowing the neutral teeth (A) to be smoothly insertable into an inner link gap of a chain (3) and further comprises one or both of a step of forming outward teeth (B) by bending a part of the neutral teeth (A) outwardly in such a manner that the outward teeth (B) are insertable into an outer link gap of the chain (3) and a step of forming inward teeth (C) by bending a part of the neutral teeth (A) inwardly in such a manner that the inward teeth (C) are insertable into the outer link gap of the chain (3).
Claims7
A method for manufacturing a single chainring (1) comprising:
- a step of preparing a single chainring blank which comprises a single chainring body and a plurality of teeth formed around an outer circumference of the single chainring body and positioned in a same plane;
- the method further comprising one or both of an outward tooth forming step for forming a plurality of outward teeth (B) in such a manner that tooth tips of at least a part of the plurality of teeth are bent outwardly and an inward tooth forming step for forming a plurality of inward teeth (C) in such a manner that tooth tips of at least a part of the plurality of teeth are bent inwardly;
- wherein the teeth which are not bent are treated as neutral teeth (A).
Dependencies are inferred from the claim text.