# US 12,763,537 B2 · Grounding brush assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,537 B2 - Document ID: US12763537B2 - Status: Granted - Kind: B2 - Application number: 18/440,105 - Filed: 2024-02-13 - Published: 2024-08-22 - Granted: 2026-10-13 - Earliest claimed: 2023-02-20 - Assignees: Aktiebolaget Skf - Applicants: Aktiebolaget Skf - Inventors: Benoit Arnault; Emmanuel Benevise; Thomas Perrotin; Anthony Simonin - Web page: https://patentgrep.com/patent/US12763537B2 ## CPC - H01R 39/385: {Means for mechanical fixation of the brush holder} - H02K 13/10: Arrangements of brushes or commutators specially adapted for improving commutation - 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}) ## Abstract A grounding brush assembly includes a brush and a brush mounting plate, the brush being provided with a plurality of conductive fibers and a support inside which the conductive fibers are housed, the mounting plate being secured to the support and provided with at least one radial portion extending radially outwardly with respect to the support. At least one centering portion extends at least axially from the radial portion and is spaced radially apart from and partially surrounding the support. Further, at least one orifice is formed in the centering portion, the orifice being spaced a distance apart from the proximal end of the centering portion and a distance apart from the distal end of the centering portion. ## Claims ### Claim 1 A grounding brush assembly mountable between a casing having a bore and a shaft disposed within the bore, the grounding brush assembly comprising: a grounding brush including a support and a plurality of conductive fibers housed within the support; and a brush mounting plate secured to the support and including at least one radial portion extending radially outwardly with respect to the support and at least one centering portion extending axially from the radial portion and being spaced apart radially from and at least partly surrounding the support, the centering portion bearing radially against the bore of the casing and having a proximal end connected to the radial portion and a distal end, the proximal and distal ends delimiting an axial dimension of the centering portion and the centering portion being sized to extend axially outside of the casing, and at least one orifice formed in the centering portion and spaced a distance apart from the proximal end and a distance apart from the distal end, being axially offset outwardly with respect to the casing and configured to enable insertion of a tool for dismantling the assembly from the bore of the casing. ### Claim 2 (depends on 1) The assembly according to claim 1, wherein the centering portion of the mounting plate has an inner surface and an outer surface and the at least one orifice is formed as a blind hole extending from the inner surface or from the outer surface. ### Claim 3 (depends on 1) The assembly according to claim 1, wherein the at least one orifice is formed as a through hole extending through a thickness of the centering portion of the mounting plate. ### Claim 4 (depends on 1) The assembly according to claim 1, wherein the centering portion of the mounting plate is annular. ### Claim 5 (depends on 1) The assembly according to claim 1, wherein the centering portion of the mounting plate is of circumferentially corrugated form, the at least one orifice being formed in a zone of a small diameter section of the corrugated centering portion. ### Claim 6 (depends on 5) The assembly according to claim 5, wherein the corrugated centering portion includes a plurality of the small diameter sections alternating with a plurality of large diameter sections, each small diameter section being located between and connected with each one of two large diameter sections by a separate one of two connecting sections. ### Claim 7 (depends on 1) The assembly according to claim 1, wherein the mounting plate includes a plurality of centering portions circumferentially spaced apart from each other. ### Claim 8 (depends on 1) The assembly according to claim 1, further comprising a bent-back portion extending radially inwardly from the distal end of the centering portion of the mounting plate. ### Claim 9 (depends on 1) The assembly according to claim 1, wherein the mounting plate further includes at least one reinforcing folded-down portion extending from the distal end of the centering portion of the mounting plate and bearing against the centering portion so as to form a ply and locally providing a double thickness of material. ### Claim 10 (depends on 9) The assembly according to claim 9, wherein the longitudinal dimension of the reinforcing folded-down portion has a thickness and a longitudinal dimension at least three times greater than the thickness. ### Claim 11 (depends on 1) An electric motor comprising: a casing; a shaft; and a grounding brush assembly according to claim 1, the grounding brush assembly being mounted at least partly radially between the casing and the shaft, the conductive fibers of the assembly being in contact with the shaft. ### Claim 12 A grounding brush assembly mountable between a casing having a bore and a shaft disposed within the bore, the grounding brush assembly comprising: a grounding brush including a support and a plurality of conductive fibers housed within the support; and a brush mounting plate secured to the support and including at least one radial portion extending radially outwardly with respect to the support and at least one centering portion extending axially from the radial portion and being spaced apart radially from and at least partly surrounding the support, the centering portion having a proximal end connected to the radial portion and a distal end, the proximal and distal ends delimiting an axial dimension of the centering portion, the centering portion including alternating small diameter sections and large diameter sections connected by connecting sections, the large diameter sections being disposable against the bore of the casing and the small diameter sections being spaced axially inwardly from the bore, and at least one orifice formed in at least one of the small diameter sections of the centering portion and spaced a distance apart from the proximal end and a distance apart from the distal end and configured to enable insertion of a tool for dismantling the assembly from the bore of the casing.