Motor
US6713915B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2002 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Sep 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/1732
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor has a stator assembly, a rotor assembly having a rotary shaft, a bearing unit that rotatably supports the rotary shaft with respect to the stator assembly, and a case body that generally houses the stator assembly and the rotor assembly. The case body includes a bottom surface section, a recessed concave section that is located radially inside the bottom surface section and concaves inwardly in an axial direction at an area opposing an excitation coil of the stator assembly, and a bearing retaining section that is formed radially inside the recessed concave section, wherein at least one part of the bearing retaining section is located more interior in the axial direction than the bottom surface section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.