# US 11,906,023 B2 · System and methods for a gear reducer

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- Number: US 11,906,023 B2
- Document ID: US11906023B2
- Status: Granted
- Kind: B2
- Application number: 18/116,422
- Filed: 2023-03-02
- Published: 2023-09-07
- Granted: 2024-02-20
- Earliest claimed: 2022-03-02
- Applicants: Herbert Thomas Baumgartner
- Inventors: Herbert Thomas Baumgartner
- Web page: https://patentgrep.com/patent/US11906023B2

## CPC

- F16H 7/06: with chains
- F16H 37/041: {for conveying rotary motion with constant gear ratio}
- B60K 7/0007: {the motor being electric}
- B60K 2007/0061: {the motor axle being parallel to the wheel axle}
- B60K 2007/0092: {the motor axle being coaxial to the wheel axle}
- F16H: GEARING
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

A gear reducer with a first center sprocket having a first number of teeth and second center sprocket having a second number of teeth are mechanically coupled by a rotor including a plurality of sprockets, wherein minimal inertial mass is overcome while changing the direction of a driven sprocket.

## Claims

### Claim 1

A gear reducer comprising:
a center shaft configured to rotate a propeller;
a first center sprocket positioned on a first side of the propeller, the first center sprocket being coupled to a fixed shaft;
a second center sprocket positioned on a second side of the propeller, the second center sprocket being coupled to an outer shaft;
a first orbiting sprocket being coupled to the propeller via a first arm, the first orbiting sprocket having a first set of teeth, the first orbiting sprocket being mechanically coupled to the first center sprocket;
a second orbiting sprocket being coupled to the propeller via the first arm, the second orbiting sprocket having a second set of teeth, the second orbiting sprocket being mechanically coupled to the second center sprocket, wherein the first set of teeth have a different number of teeth than the second set of teeth.

### Claim 2 (depends on 1)

The gear reducer of claim 1, wherein the first arm mechanically couples the first orbiting sprocket with the second orbiting sprocket so that there is no relative movement between the first orbiting sprocket and the second orbiting sprocket.

### Claim 3 (depends on 1)

The gear reducer of claim 1, wherein a first number of teeth of the first orbiting sprocket is greater than or less than a second number of teeth of the second orbiting sprocket by one.

### Claim 4 (depends on 1)

The gear reducer of claim 1, wherein the outer shaft radially encompasses the center shaft, and the outer shaft is positioned between the propeller and a motor along a longitudinal axis of the gear reducer.

### Claim 5 (depends on 4)

The gear reducer of claim 4, wherein the outer shaft is configured to rotate responsive to the second center sprocket being rotated by the second orbiting sprocket.

### Claim 6 (depends on 5)

The gear reducer of claim 5, wherein the outer shaft is coupled to a driving sprocket, wherein the driving sprocket is positioned between the propeller and the motor along the longitudinal axis of the gear reducer.

### Claim 7 (depends on 6)

The gear reducer of claim 6, wherein the motor is configured to supply rotational energy towards the propeller in a first direction along the longitudinal axis, and the second center sprocket is configured to supply rotational energy towards the driving sprocket in a second direction along the longitudinal axis, wherein the first direction and second direction are opposite directions.

### Claim 8 (depends on 1)

The gear reducer of claim 1, wherein a first rotations per minute of the second center sprocket is lower than a second rotations per minute of the center shaft.

### Claim 9 (depends on 1)

The gear reducer of claim 1, wherein the first center sprocket is coupled to the first orbiting sprocket via a first chain, and the second center sprocket is coupled to the second orbiting sprocket via a second chain.

### Claim 10 (depends on 9)

The gear reducer of claim 9, wherein a first number of links on the first chain is different than a second number of links on the second chain.