Propeller for ventilator, with a variable chord length
US9970453B2 · kind B2 · utility
6Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2011 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | May 4, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blower wheel comprises a hub, a guide and blades extending radially between the hub and the guide, each blade comprising a root at its junction with the hub and a head at the junction with the guide, each blade having a leading edge and a trailing edge between which, at each flattened cross section, a chord is defined. For each blade, between the root and the head, the length of the chord varies and the variation in the length of chord between the root and the head has a point of inflexion between two levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.