Chainring

Patent metadata

Field	Value
Publication number	US-12060929-B2
Application number	US-202217839333-A
Country	US
Kind code	B2
Filing date	Jun 13, 2022
Priority date	Dec 18, 2018
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A chainring is disclosed. The chainring includes a plurality of teeth about the outer perimeter of the chainring; and a chain retention feature at a root of one or more of the plurality of teeth and traversing at least a portion of a circumference of the chainring, the chain retention feature to align with at least a portion of a roller chain and assist in a retention of the roller chain on the chainring.

First claim

What is claimed is:

1. A chainring comprising:
a plurality of teeth about an outer perimeter of the chainring; and
a chain retention feature at a root of one or more of the plurality of teeth and traversing at least a portion of a circumference of the chainring, and said chain retention feature beginning at the root of one or more of the plurality of teeth and being radially beveled, such that it is thicker toward a center of the chainring and thinner toward a tip of the plurality of teeth.

2. The chainring of claim 1 , further comprising:
said chain retention feature at the root of each of the plurality of teeth, the chain retention feature traversing an entire circumference of the chainring.

3. The chainring of claim 1 , wherein said chain retention feature is a beveled chain retention feature.

4. The chainring of claim 1 , wherein the chain retention feature is configured to align with at least a portion of a roller chain, said chain retention feature assisting in retention of said roller chain on said chainring, and wherein the roller chain comprises a plurality of narrower links interspersed between a plurality of wider links, and said chain retention feature is shaped to mirror the plurality of narrower links of the roller chain.

5. The chainring of claim 4 , wherein the chain retention feature does not need to be clocked with respect to said roller chain as said chain retention feature only mirrors the shape of the plurality of narrower links of the roller chain.

6. The chainring of claim 4 , wherein the roller chain comprises a plurality of narrower links interspersed between a plurality of wider links, and said chain retention feature is shaped to mirror the plurality of wider links of the roller chain.

7. The chainring of claim 1 , further comprising:
an opening in a center of said chainring, the opening for fixedly coupling said chainring with a crank arm to form a drive side of a crank assembly.

8. The chainring of claim 1 , wherein the chainring comprises a single material selected from the group consisting of: aluminum, titanium, composite, and steel.

9. The chainring of claim 1 , wherein the chainring comprises a combination of material selected from the group consisting of: aluminum, titanium, composite, and steel.

Assignees

• Fox Factory Inc

Inventors

• Klawer Paul
• Allinger Wesley E
• Kennett Jason

Classifications

• F16H55/08

  Profiling · CPC title

• F16G13/06

  with links connected by parallel driving-pins with or without rollers {so-called open links} · CPC title

• B62M9/105

  involving front sprocket chain-wheels engaged by the chain, belt or the like · CPC title

• F16H55/30 Primary

  Chain-wheels · CPC title

• B62M9/10 Primary

  involving different-sized wheels, {e.g. rear sprocket chain wheels} selectively engaged by the chain, belt, or the like {(bicycle hubs rotatably arranged on axle B60B27/023)} · CPC title