Ceiling fan structure
US12173719B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 7, 2024 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Feb 7, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/384
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A ceiling fan structure has a mounting bracket unit, a down rod connected to the mounting bracket unit, a spindle connected below the down rod, a plurality of first fan blades arranged around the spindle and driven to rotate around the spindle, and a plurality of second fan blades. Each first fan blade forms an airflow guide ring. The second fan blade is located in the airflow guide ring. Each first fan blade has a first windward face. Each second fan blade has a second windward face opposite to the first windward face. When the first fan blades are rotated, airflows output by the first windward faces of the first fan blades act on the second windward faces of the second fan blades to push the second fan blades to rotate in a reverse direction relative to the respective first fan blades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.