# US 6,724,123 B2 · Dynamo electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,724,123 B2 - Document ID: US6724123B2 - Status: Granted - Kind: B2 - Application number: 10/356,397 - Filed: 2003-01-31 - Published: 2003-09-18 - Granted: 2004-04-20 - Earliest claimed: 2002-01-31 - Assignees: Goodrich Corporation - Inventors: Gregory A Raye; Gordon W Brunson - Web page: https://patentgrep.com/patent/US6724123B2 ## CPC - H02K 15/50: Disassembling, repairing or modifying dynamo-electric machines (repairing of cooling fluid boxes H02K15/38) - H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers - H02K 5/14: Means for supporting or protecting brushes or brush holders - H02K 5/148: {Slidably supported brushes} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A brush replacement kit for use with a dynamo electric machine of the kind having a yoke, apertures in the yoke through which brushes of the machine are accessible, and a brush holder assembly for supporting the brushes in a predetermined alignment in relation to a commutator or slip-ring assembly of the machine, the kit comprising replacement brushes of a length exceeding the length of the conventional brushes for the machine, and a cover component comprising a cylindrical band for attachment around the exterior of the yoke to close said brush access apertures in use, said band including radially outwardly extending protrusions to be positioned over said apertures of the yoke in use and thereby to accommodate the additional length of the replacement brushes. ## Claims ### Claim 1 A brush replacement kit for use with a dynamo electric machine of the kind having a yoke, apertures in the yoke through which brushes of the machine are accessible, and a brush holder assembly for supporting the brushes in a predetermined alignment in relation to a commutator or slip-ring assembly of the machine, the kit comprising replacement brushes of a length exceeding the length of the conventional brushes for the machine, and a cover component comprising a cylindrical band for attachment around the exterior of the yoke to close said brush access apertures in use, said band including radially outwardly extending protrusions to be positioned over said apertures of the yoke in use and thereby to accommodate the additional length of the replacement brushes. ### Claim 2 (depends on 1) A kit as claimed in claim 1 further including replacement springs for attachment to respective brush holders and engagable in use with outer ends of respective replacement brushes to urge the brushes radially inwardly of the machine in use throughout the increased wear length of the replacement brushes. ### Claim 3 (depends on 2) A kit as claimed in claim 2 wherein said replacement springs comprise constant force springs together with clip means for anchoring the constant force springs to a respective brush holder. ### Claim 4 (depends on 3) A kit as claimed in claim 3 further including replacement brush holders shaped to receive said replacement springs and said replacement brushes. ### Claim 5 (depends on 1) A dynamo electric machine fitted with a kit of the kind defined in claim 1. ### Claim 6 A brush replacement kit for use with a dynamo electric machine of the kind having a yoke, apertures in the yoke through which brushes of the machine are accessible, and a brush holder assembly for supporting the brushes in a predetermined alignment in relation to a commutator or slip-ring assembly of the machine, the kit comprising replacement brushes of a length exceeding the length of the conventional brushes for the machine, replacement springs for attachment to respective brush holders and engagable in use with outer ends of respective replacement brushes to urge the brushes radially inwardly of the machine in use throughout the increased wear length of the replacement brushes, said replacement springs comprising constant force springs together with clip means for anchoring the constant force springs to a respective brush holder, replacement brush holders shaped to receive said replacement springs and said replacement brushes, and a cover component comprising a cylindrical band for attachment around the exterior of the yoke to close said brush access apertures in use, said band including radially outwardly extending protrusions to be positioned over said apertures of the yoke in use and thereby to accommodate the additional length of the replacement brushes. ### Claim 7 A dynamo electric machine of the kind having a yoke, apertures in the yoke through which brushes of the machine are accessible, a brush holder assembly for supporting the brushes in a predetermined alignment in relation to a commutator or slip-ring assembly of the machine, brushes of a length exceeding the length of the conventional brushes for the machine, spring arrangements attached to respective brush holders and engaging with outer ends of respective brushes to urge the brushes radially inwardly of the machine in use throughout the increased wear length of the brushes, and a cover component comprising a cylindrical band for attachment around the exterior of the yoke to close said brush access apertures in use, said band including radially outwardly extending protrusions to be positioned over said apertures of the yoke in use and thereby to accommodate the additional length of the brushes. ### Claim 8 (depends on 7) A dynamo electric machine as claimed in claim 7 wherein, said spring arrangements comprise constant force springs together with clip means for anchoring the constant force springs to a respective brush holder, and said brush holders being shaped to receive said constant force springs together with clip means, and said brushes.