# US 12,763,536 B2 · Grounding brush assembly

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- Number: US 12,763,536 B2
- Document ID: US12763536B2
- Status: Granted
- Kind: B2
- Application number: 18/607,710
- Filed: 2024-03-18
- Published: 2024-09-26
- Granted: 2026-10-13
- Earliest claimed: 2023-03-24
- Assignees: Aktiebolaget Skf
- Applicants: Aktiebolaget Skf
- Inventors: Benoit Arnault; Emmanuel Benevise
- Web page: https://patentgrep.com/patent/US12763536B2

## CPC

- H01R 39/24: Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
- H01R 4/64: Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
- H01R 39/385: {Means for mechanical fixation of the brush holder}
- H01R 39/39: wherein the brush is fixedly mounted in the holder
- H01R 39/64: Devices for uninterrupted current collection
- H02K 11/40: Structural association with grounding devices
- H05F 3/02: by means of earthing connections
- H01R 2201/10: for dynamoelectric machines
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H05F: STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY

## Abstract

A grounding brush assembly includes a grounding brush having a support and a plurality of conductive fibers fitted inside the support. A brush fitting plate is connected with the support of the brush and includes a plurality of retention tongues configured to retain the support of the brush, a radial portion, an annular flange extending from the radial portion and spaced radially outwardly from the retention tongues. The fitting plate also includes a plurality of through-openings, which each extend through the radial portion and through the flange, and at least one local deformation formed on the flange of the fitting plate and extending radially inwardly.

## Claims

### Claim 1

A grounding brush assembly comprising:
a grounding brush including a support and a plurality of conductive fibers fitted inside the support; and
a brush fitting plate connected with the support of the brush and including a plurality of retention tongues configured to retain the support, a radial portion, an annular flange extending from the radial portion and offset radially outwardly from and axially overlapping the plurality of retention tongues, the annular flange having an outer surface defining the outer diameter of the fitting plate and centering the fitting plate within a bore of a housing, a plurality of through-openings which each extend through the radial portion and through the flange, and at least one local deformation formed on the flange, extending radially inwardly and being engageable by a tool to push the grounding brush axially during installation within the bore of the housing.

### Claim 2 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation is disposed circumferentially between two of the plurality of through-openings of the fitting plate.

### Claim 3 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation extends axially from the free end of the flange of the fitting plate.

### Claim 4 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation is formed on a portion of an axial length of the flange of the fitting plate.

### Claim 5 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation is formed on an entire axial length of the flange of the fitting plate.

### Claim 6 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation is axially spaced from a free end of the flange of the fitting plate.

### Claim 7 (depends on 1)

The assembly according to claim 1, wherein the at least one local deformation includes a plurality of local deformations formed on the flange of the fitting plate, each one of the plurality of local deformations extending radially inwardly and the plurality of local deformations being circumferentially spaced apart.

### Claim 8 (depends on 1)

The assembly according to claim 1, wherein the plurality of retention tongues of the fitting plate extend from the radial portion of the fitting plate.

### Claim 9 (depends on 1)

The assembly according to claim 1, wherein the radial portion of the fitting plate is supported axially against the support of the brush.

### Claim 10 (depends on 1)

An electric motor comprising:
a housing;
a shaft; and
at least one grounding brush assembly according to claim 1 fitted radially between the housing and the shaft, the conductive fibers of the brush of the grounding brush assembly being in contact with the shaft.