# US 2019/0111996 A1 · Cycle crankset with self-positioned floating chainring

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- Number: US 2019/0111996 A1
- Document ID: US20190111996A1
- Status: Published application
- Kind: A1
- Application number: 16/091,218
- Filed: 2017-04-04
- Published: 2019-04-18
- Earliest claimed: 2016-04-04
- Assignees: C3B
- Applicants: C3B
- Inventors: Jacques CERDAN
- Web page: https://patentgrep.com/patent/US20190111996A1

## CPC

- B62M 3/06: with elliptical or other non-circular rotary movement
- B62M 3/00: Construction of cranks operated by hand or foot
- B62M 9/08: involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
- B62M 9/085: {involving eccentrically mounted driving or driven wheel}
- B62M 2003/006: {Crank arrangements to overcome dead points}
- B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16)

## Abstract

A cycle crankset, comprising independent cranks articulated around a crank axis and each having a pedal axis, a cam pivotably mounted about the crank axis, and a chainring assembly pivotably mounted about the cam about an axis parallel to the crank axis, the cranks being connected to the chainring assembly via connecting rods, the articulation point between each of the cranks and one of the connecting rods being located on the portion of the crank opposite the pedal axis relative to the crank axis.

## Claims

### Claim at position 1

1-8. (canceled)

### Claim 9

A cycle crankset for a cycle, comprising:
independent cranks articulated around a crank axis and each with a pedal axis,
a cam pivotably mounted about said crank axis, and
a chainring assembly pivotably mounted about the cam, about an axis parallel to the crank axis,
the cranks being connected at articulation points to the chainring assembly via connecting rods,
each articulation point between one of said cranks and one of said connecting rods being located on a portion of the crank opposite the pedal axis relative to the crank axis.

### Claim 10 (depends on 9)

The cycle crankset according to claim 9, wherein said articulation point is located on each of said cranks in a plane passing through the crank axis and forming an angle between 0 and 90° with a plane passing through the pedal axis and the crank axis.

### Claim 11 (depends on 9)

The cycle crankset according to claim 9, wherein said articulation point is located on each of said cranks in a plane passing through the pedal axis and the crank axis.

### Claim 12 (depends on 9)

The cycle crankset according to claim 9, further comprising means for limiting the pivoting of the cam about said crank axis.

### Claim 13 (depends on 12)

The cycle crankset according to claim 12, wherein said means for limiting pivoting comprise at least one stop configured to rest on part of the cycle.

### Claim 14 (depends on 12)

The cycle crankset according to claim 12, wherein said means for limiting pivoting block a rotation of the cam around the crank axis.

### Claim 15 (depends on 9)

The cycle crankset according to claim 9 wherein the cam is left free to pivot about said crank axis.

### Claim 16 (depends on 9)

The cycle crankset according to claim 9, wherein said cam comprises a threaded portion, adapted to be screwed inside a housing of the cycle to be able to pivot around the crank axis.