Cinch direct mount 2X ring system

Patent metadata

Field	Value
Publication number	US-11999439-B2
Application number	US-202117326170-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	Apr 28, 2017
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A cinch direct mount 2 X ring system is disclosed. One embodiment discloses a chainring assembly having a drive side crank arm with a chainring assembly interface including a plurality of splines, a circumference, and an axial length. The chainring assembly includes a first chainring having a first outer diameter and a first center assembly shape. The chainring assembly includes a second chainring having a second outer diameter and a second center assembly shape, the second outer diameter being different than the first outer diameter. The chainring assembly also includes a fastener to couple the first chainring and the second chainring with the chainring assembly interface, such that at least one of the first center assembly shape or the second center assembly shape engages with the plurality of splines.

First claim

What is claimed is:

1. A chainring comprising:
a first chainring having a first outer diameter and a first center shape;
a second chainring having a second outer diameter and a second center shape, the second outer diameter being different than the first outer diameter;
a fastener to couple the first chainring and the second chainring with a chainring interface, such that at least one of the first center shape or the second center shape engages with a plurality of splines of said chainring interface;
the first center shape configured to engage with the plurality of splines about a circumference of the chainring interface over a first portion of an axial length of said chainring interface;
the second center shape configured to engage with the plurality of splines about the circumference of the chainring interface over a second portion of the axial length of said chainring interface; and
the first center shape comprising:
an inner diameter configured to engage with the plurality of splines about the circumference of the chainring interface over an entirety of the axial length;
an outer diameter comprising a second plurality of splines about the circumference of the first center shape, the second plurality of splines having a second axial length; and
the second center shape configured to engage with the second plurality of splines about the circumference of the first center shape over an entirety of the second axial length.

2. The chainring of claim 1 , wherein the fastener is selected from the group consisting of: a single central fastener and a plurality of radially located fasteners.

3. The chainring of claim 1 , wherein the first chainring and the second chainring comprise a material selected from the group consisting of: aluminum, a titanium, and steel.

4. The chainring of claim 1 , wherein the first chainring is comprised of a first material and the second chainring is comprised of a second material different than the first material.

Assignees

• Fox Factory Inc

Inventors

• Choltco-Devlin Evan Michael
• Kennett Jason
• Edwards David Robert

Classifications

• B62M9/105 Primary

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

• B62M1/36

  with rotary cranks, e.g. with pedal cranks (B62M1/34 takes precedence; combined with reciprocating levers B62M1/26; cranks which can be immobilised as foot rests B62M5/00) · CPC title

• B62M3/00

  Construction of cranks operated by hand or foot · CPC title

• F16H55/30

  Chain-wheels · CPC title