# US 11,439,889 B1 · Skateboard with inertial enhancement

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- Number: US 11,439,889 B1
- Document ID: US11439889B1
- Status: Granted
- Kind: B1
- Application number: 17/737,275
- Filed: 2022-05-05
- Granted: 2022-09-13
- Earliest claimed: 2022-05-05
- Applicants: Robert Anton Pasic
- Inventors: Robert Anton Pasic
- Web page: https://patentgrep.com/patent/US11439889B1

## CPC

- A63C 17/26: with special auxiliary arrangements, e.g. illuminating, marking, or push-off devices
- A63C 17/0046: {with shock absorption or suspension system}
- A63C 17/012: {with a truck, i.e. with steering mechanism comprising an inclined geometrical axis to convert lateral tilting of the board in steering of the wheel axis}
- A63C 17/015: {with wheels arranged in two pairs}
- A63C 17/223: {Wheel hubs}
- A63C 2203/20: Shock or vibration absorbing
- A63C: SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE (water skis B63B32/00, B63B34/00)

## Abstract

A skateboard truck that includes an inertia drive attached to a wheel. The inertia drive causes an inertial mass (i.e. flywheel) to turn at a higher speed then the wheel. During “pumping” of the skateboard the wheels accelerate and an inertia drive helps propel the skateboard given its inertia combined with the wheel inertia. The inertia drive may be configured to maintain skateboard stability at high speeds.

## Claims

### Claim 1

A skateboard truck comprising;
a hanger,
a wheel having a first rotational axis and a periphery rotationally attached to the hanger,
an inertial mass having a second rotational axis rotationally attached to the hanger,
a drive device attached to the hanger configured to rotate the inertial mass at a greater rotational speed than the wheel.

### Claim 2 (depends on 1)

The skateboard truck of claim 1, wherein the first rotational axis and the second rotational axis are collinear.

### Claim 3 (depends on 1)

The skateboard truck of claim 1, wherein the first rotational axis and the second rotational axis are parallel.

### Claim 4 (depends on 1)

The skateboard truck of claim 1, wherein the first rotational axis and the second rotational axis are perpendicular.

### Claim 5 (depends on 1)

The skateboard truck of claim 1, where in the drive device includes;
a shaft having a third rotational axis positioned parallel to the first rotational axis, and configured to contact the wheel and further configured to rotate the inertial mass.

### Claim 6 (depends on 5)

The skateboard truck of claim 5, wherein the shaft is round and is smaller in diameter than the wheel, and is further configured to contact the periphery of the wheel, and
the second rotational axis is collinear with the third rotational axis, the inertia mass being operatively attached to the shaft and configured to rotate about the third rotational axis.

### Claim 7 (depends on 1)

The skateboard truck of claim 1, wherein the drive device includes;
a first gear operatively attached to the wheel, and
a second gear configured to provide torque to the inertial mass.

### Claim 8 (depends on 1)

The skateboard truck of claim 1, wherein the drive device comprises;
a first pulley operatively attached to the wheel,
a second pulley operatively attached to the inertial mass, and
a belt configured to provide torque between the first pulley to the second pulley.

### Claim 9 (depends on 8)

The skateboard truck of claim 8, wherein the first pulley is rigidly attached to the wheel.

### Claim 10 (depends on 8)

The skateboard truck of claim 8, wherein the second pulley is rigidly attached to the inertial mass.

### Claim 11 (depends on 9)

The skateboard truck of claim 9, wherein the second pulley is rigidly attached to the inertial mass.

### Claim 12 (depends on 1)

The skateboard truck of claim 1, wherein the drive device is outboard of the wheel.

### Claim 13 (depends on 1)

The skateboard truck of claim 1, wherein the drive device is inboard of the wheel.

### Claim 14 (depends on 1)

The skateboard truck of claim 1, wherein the drive device is rearward of the wheel.

### Claim 15 (depends on 1)

The skateboard truck of claim 1, wherein the drive device is forward of the wheel.

### Claim 16

A method of adjusting the wheel inertia of a skateboard truck, wherein the skateboard includes;
a wheel having a first rotational axis and a periphery,
an inertial mass having mass and a second rotational axis configured to transfer torque to the wheel, and
a drive device configured to rotate the inertial mass at a greater rotational speed than the wheel,
comprising;
adjusting the rotational speed of the inertial mass, and
pumping the skateboard truck to get a desired response from the skateboard truck.

### Claim 17 (depends on 16)

The method of claim 16 further comprising;
adjusting the mass of the inertial mass.

### Claim 18

A skateboard comprising;
a hanger,
a wheel rotationally supported on the hanger,
an inertial mass rotationally supported on the hanger, and
a drive device supported on the hanger configured to rotate the inertial mass at a speed greater than wheel speed and further configured to stabilize the skateboard.

### Claim 19 (depends on 18)

The skateboard of claim 18 wherein, the wheel rotates around a first axis and the inertia mass rotates around a second axis, and first and second axis are parallel.

### Claim 20 (depends on 18)

The skateboard of claim 18 wherein, the wheel rotates around a first axis and the inertia mass rotates around a second axis, and first and second axes are perpendicular.