# US 11,992,847 B2 · System for reducing dust emissions resulting from tire abrasion

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- Number: US 11,992,847 B2
- Document ID: US11992847B2
- Status: Granted
- Kind: B2
- Application number: 17/432,300
- Filed: 2020-03-17
- Published: 2022-06-02
- Granted: 2024-05-28
- Earliest claimed: 2019-04-03
- Assignees: Technische Universitaet Dresden
- Applicants: Technische Universitaet Dresden
- Inventors: Matthias Lange
- Web page: https://patentgrep.com/patent/US11992847B2

## CPC

- B03C 1/0332: {using permanent magnets}
- B03C 1/0335: {using coils}
- B03C 1/035: Open gradient magnetic separators, i.e. separators in which the gap is unobstructed, characterised by the configuration of the gap
- B03C 1/10: with cylindrical material carriers (B03C1/247 takes precedence)
- B03C 1/14: with non-movable magnets
- B03C 1/30: Combinations with other devices, not otherwise provided for
- B60C 19/00: Tyre parts or constructions not otherwise provided for
- B60R 19/00: Wheel guards; Radiator guards, {e.g. grilles}; Obstruction removers; Fittings damping bouncing force in collisions ({reinforcement elements for side doors B60J5/0412; } mudguards B62D)
- B62D 25/161: {Mud-guards made of non-conventional material, e.g. rubber, plastics}
- B03C 2201/20: Magnetic separation of bulk or dry particles in mixtures
- B03C 2201/24: for measuring or calculating of parameters, e.g. efficiency
- B03C 2201/30: for use in or with vehicles
- B60R 2019/002: {Wheel guards}
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

A system for reducing dust emissions resulting from tire abrasion, comprising a collecting unit (1), arranged at a distance from the tread (4) of a tire (5) and has at least one first electromagnet and/or permanent magnet (2). At least the material with which the tread (4) of the tire (5) is formed is magnetic or is ferromagnetically, ferrimagnetically or anti-ferromagnetically magnetisable, so that the tire abrasion particles (6) created as a result of abrasion of the tread (4) are magnetic or are ferromagnetically, ferrimagnetically or anti-ferromagnetically magnetisable. The at least one first electromagnet and/or permanent magnet (2) is designed to magnetise tire abrasion particles (6) and to accumulate the magnetized tire abrasion particles (6) detached from the material of the tread (4) in a collection point (3), arranged on a vehicle.

## Claims

### Claim 1

A system for reducing dust emissions due to tire abrasion comprising a capturing unit having at least one first electromagnet and/or permanent magnet, wherein
the capturing unit is arranged at a distance from tread of a tire; and
at least material by which the tread of the tire is formed is magnetic or is ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable so that tire abrasion particles arising due to abrasion of the tread of the tire are magnetic or are ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable; and
the at least one first electromagnet and/or permanent magnet is configured to magnetize the magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable tire abrasion particles and to accumulate the magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable tire abrasion particles that are released from the tread at a collection site that is arranged on a vehicle.

### Claim 2 (depends on 1)

The system in accordance with claim 1, wherein the system has a filter, a deposition chamber, or a container releasably connected to the system, at or in which the collection site is arranged and the magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable tire abrasion particles can be accumulated.

### Claim 3 (depends on 1)

The system in accordance with claim 1, wherein the system has a release device by which the accumulated tire abrasion particles can be mechanically and pneumatically released from the collection site and/or can be released by means of a flushing agent.

### Claim 4 (depends on 1)

The system in accordance with claim 1, wherein the at least one first electromagnet and/or permanent magnet is configured and/or arranged in the capturing unit to form a magnetic field that is aligned at an angle of 0° to 90° to a surface normal of the tread in the region of the smallest distance between the first electromagnet and/or permanent magnet and the tread of the tire.

### Claim 5 (depends on 1)

The system in accordance with claim 1, wherein the at least one first electromagnet and/or permanent magnet is configured and/or arranged in the capturing unit to form a magnetic field that directs the tire abrasion particles to the collection site.

### Claim 6 (depends on 1)

The system in accordance with claim 1, wherein the system has a suction device and/or a flow channel that is configured to conduct the magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable tire abrasion particles in the direction of the at least one electromagnet and/or permanent magnet and/or to the collection site during driving.

### Claim 7 (depends on 1)

The system in accordance with claim 1, wherein the at least one first electromagnet and/or permanent magnet is configured and/or arranged to form a magnetic field that has magnetic fields sectionally oriented in reverse to one another at the tread and its flow circuit is closed via a non-magnetizable substructure of the tread that has a higher magnetic permeability than the tread.

### Claim 8 (depends on 1)

The system in accordance with claim 1, wherein at least material by which the tread of the tire is formed has a rubber mixture that comprises at least 1 volume % of soft magnetically ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable particles.

### Claim 9 (depends on 1)

The system in accordance with claim 1, wherein the system has at least one sensor that is configured to detect amount of accumulated tire abrasion particles at the collection site.

### Claim 10

A method of reducing fine dust due to tire abrasion,
a tire is provided that which has at least one tread that is formed by material that is magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetizable so that tire abrasion particles created due to abrasion of the tread during driving are magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetized by means of at least one first electromagnetic and/or permanent magnet; and accumulating
the magnetic or ferromagnetically, ferrimagnetically, or antiferromagnetically magnetized tire abrasion particles by means of the at least one first electromagnetic and/or permanent magnet at a collection site that is arranged on a vehicle.