Cooling fan with variable blade surface area
US9410557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/20136
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan module including a first fan, a second fan and an actuator is provided. The first fan has a first pivot portion and a plurality of first fan blades. Each first fan blade has a first blade face. The second fan has a second pivot portion and a plurality of second fan blades corresponding to the first fan blades. Each second fan blade has a second blade face. The second pivot portion is slidably disposed at a containing cavity of the first pivot portion. The actuator is adapted to drive the first fan to rotate. The first fan is adapted to drive the second fan to rotate. When the second pivot portion protrudes out of the containing cavity, a part of each of the second blade faces does not overlap with the corresponding first blade face along a direction perpendicular to the corresponding first blade face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.