Systems and methods for threaded fasteners with grounding brush endpoints

Patent metadata

Field	Value
Publication number	US-12095316-B2
Application number	US-202117505391-A
Country	US
Kind code	B2
Filing date	Oct 19, 2021
Priority date	Oct 26, 2020
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

Systems and methods to mitigate electrical voltage on a rotating plate are disclosed. An example grounding pen brush includes two or more bundles of conductive filaments that are separated from the others by a threshold distance.

First claim

What is claimed is:

1. A grounding pen brush to mitigate electric current on a rotating plate, the pen brush comprising:
a body including a plurality of external threads for securing the pen brush in a threaded opening of the rotating plate; and
a grounding brush assembly including three or more bundles of conductive filaments, each conductive filament bundle being substantially parallel and separated from each other conductive filament by a threshold distance and configured to extend from the opening when the pen brush is secured to the rotating plate, the conductive filaments making electrical contact with a conductive element during rotational movement of the rotating plate.

2. The grounding pen brush as defined in claim 1 , further comprising a base to secure the three or more bundles of conductive filaments, wherein each of the three or more bundles of conductive filaments are separated at the base of the grounding brush assembly by the threshold distance.

3. The grounding pen brush as defined in claim 1 , wherein the three or more bundles of conductive filaments comprises a first bundle, a second bundle and a third bundle of conductive filaments, the grounding brush assembly further comprising one or more retainers configured to separate the first bundle from the second bundle and the third bundle of conductive filaments.

4. The grounding pen brush as defined in claim 3 , wherein the one or more retainers or the three or more bundles of conductive filaments are secured to the grounding brush assembly by a fastener oriented at a non-zero angle relative to the orientation of the three or more bundles of conductive filaments.

5. The grounding pen brush as defined in claim 3 , wherein the one or more retainers or the three or more bundles of conductive filaments are secured to the grounding brush assembly by an adhesive.

6. The grounding pen brush as defined in claim 3 , wherein the one or more retainers comprises a dielectric material.

7. The grounding pen brush as defined in claim 3 , wherein the one or more retainers comprises a conductive material.

8. The grounding pen brush as defined in claim 3 , wherein the conductive filaments of the first bundle are a first length, and the conductive filaments of the second bundle are a second length greater than the first length.

9. The grounding pen brush as defined in claim 3 , wherein the first bundle comprises a first number of conductive filaments, and the second bundle comprises a second number of conductive filaments greater than the first number.

10. The grounding pen brush as defined in claim 1 , wherein one or more conductive filaments comprises at least one of a composite fiber, carbon fiber, nickel, stainless steel, a woven fiber, or a conductive plastic.

11. The grounding pen brush as defined in claim 1 , wherein the rotating plate is arranged in a motor.

12. The grounding pen brush as defined in claim 1 , wherein the rotating plate is arranged in a wind turbine.

13. A grounding pen brush to mitigate electric current on a moving plate, the pen brush comprising:
a body including a plurality of external threads for securing the pen brush in a threaded opening of the moving plate; and
a grounding brush assembly including three or more substantially parallel bundles of conductive filaments each separated by at least a minimum threshold distance and configured to extend from the opening when the pen brush is secured to the moving plate, the conductive filaments making electrical contact with a conductive element during movement of the moving plate.

14. The grounding pen brush as defined in claim 13 , further comprising a base to secure the three or more bundles of conductive filaments, wherein each of the three or more bundles of conductive filaments are separated at a base of the grounding brush assembly by a threshold distance.

15. The grounding pen brush as defined in claim 13 , wherein one or more of the moving plate or the conductive element is a gear.

16. The grounding pen brush as defined in claim 13 , wherein the conductive element comprises a plate in a position fixed relative to movement of the moving plate.

17. The grounding pen brush as defined in claim 13 , wherein the conductive element is arranged on a plate in a position fixed relative to movement of the moving plate.

18. The grounding pen brush as defined in claim 13 , wherein the moving plate comprises one or more threaded openings to receive the grounding pen brush.

19. The grounding pen brush as defined in claim 18 , further comprising a head portion configured to drive the grounding pen brush into or out from the one or more threaded openings of the moving plate.

20. A grounding pen brush to mitigate electric current on a rotating plate, the pen brush comprising:
a body including a plurality of external threads for securing the pen brush in a threaded opening of the rotating plate; and
a grounding brush assembly including:
three or more bundles of conductive filaments, each conductive filament being separated from each other conductive filament by a threshold distance and configured to extend from the opening when the pen brush is secured to the rotating plate, the conductive filaments making electrical contact with a conductive element during rotational movement of the rotating plate; and
one or more retainers comprising a dielectric material, the one or more retainers configured to separate the three or more bundles of conductive filaments.

Assignees

• Illinois Tool Works

Inventors

• Nye Richard Francis
• Roman Mathew

Classifications

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• H01R2201/10

  for dynamoelectric machines · CPC title

• H02K11/40 Primary

  Structural association with grounding devices · CPC title

• H01R39/20

  characterised by the material thereof · CPC title

• H01R39/385 Primary

  Means for mechanical fixation of the brush holder · CPC title