Blower
US10495114B2 · kind B2 · utility
0Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2015 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Apr 12, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/526
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blower fan includes a plurality of blades radially extending from a boss provided at a rotary center and spaced apart from each other in the rotational direction, and a ring portion connecting outer peripheral ends of the blades in a ring shape. A radially outer end part at an end on an air-flow upstream side of the ring portion is positioned outward in a radial direction of a rotary shaft in the blower fan, as toward the air-flow upstream side. Thus, the blower can prevent the backflow air from being swirled, thereby reducing noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.