Electric motor having brush holder with axial movement limiting armature contact member protector
US6800982B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jul 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/148
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor provides a carbon contact member of a commutator from colliding with a brush holder. A projection is formed in the brush holder so that it projects toward an end face of a resin mold of an armature. An end face of this projection, which is opposed to the end face of the resin mold of the armature, is positioned in the axial direction so as to form a clearance between the contact members and the brush holder when the armature is moved toward the brush holder by an external force and the end face comes in contact with the end face. As a result, if shock is applied to the fuel pump and the armature moves toward the brush holder, the contact members of the commutator are prevented from colliding with the brush holder. It thereby becomes possible to prevent the carbon contact members from being damaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.