Impeller, impeller blade wheel, air-blowing device, and method of manufacturing air-blowing device
US11149749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Apr 9, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2260/966
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An impeller that rotates about a central axis extending vertically includes a base portion and blades. The base portion spreads perpendicularly to the central axis. The blades are on an upper surface of the base portion at intervals in a circumferential direction. The base portion includes an irregular portion that is radially outward and in which irregularities are repeated in the circumferential direction. The irregular portion includes one or more first irregular regions and a second irregular region. The first irregular regions include first recesses with a same shape and first projections with a same shape, the first recesses and projections being alternately arranged one by one. The second irregular region is positioned between the first irregular regions and includes at least one among a second recess with a different shape from the first recesses and a second projection with a different shape from the first projections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.