Motor, fan, electric vacuum cleaner, and hand drier
US11588386B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Nov 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/03
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A rotor has magnetic poles and a stator has the same number of teeth. Each tooth has first and second side portions in first and second directions in a circumferential direction, and a tooth tip facing the rotor. First and second protruding portions protrude in the first and second directions from the first and second side portions on the tooth tip side. The tooth tip has a first end having a gap G1 with the rotor and a second end having a gap G2 (>G1) with the rotor. A reference line passes through a rotation axis and perpendicular to a radial straight line passing through a middle position between both side portions. From the reference line, a distance D1 a border between the first protruding portion and the first side portion is longer than a distance D2 to a border between the second protruding portion and the second side portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.