Room air filtering and freshening device
US6511531B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Feb 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/89
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An air filtering and freshening device comprising a filter element within the intake of the device housing, a motorized fan mounted within the device housing which draws contaminated air into the device, and forces air out of the device through an outlet having separate exhaust and scent discharge passages. The exhaust passage including a plurality of arcuate vanes radiating outwardly from the interior of the device, and being disposed across the exhaust passage to promote efficient operation by reducing the pressure drop through the passage and minimizing operational noise. The scent discharge passage includes a scent element producing a freshening scent. The scent element is removably positioned adjacent the scent discharge passage, which carries high velocity, high pressure filtered air from the motorized fan, picks up the concentrated freshening scent, and discharges in an effective and efficient manner, a continuous stream of freshening scent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.