Timed aerosol fragrance dispenser for forced-air duct installation
US7854394B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Jun 21, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A timed aerosol fragrance dispenser includes a housing containing a programmable microprocessor, a low-voltage DC power source, a piezoelectric assembly for spraying timed bursts of fragrance, and circuitry for activating the piezoelectric assembly, and a magnetic reed switch air flow detector. A fragrance-containing reservoir attaches to the housing, which incorporates a clip which allows the dispenser to be secured to a heating and air conditioning vent register. When the air flow detector senses air flow from the vent register, the microcontroller in combination with other circuitry generates current pulses having a voltage sufficiently high to activate the piezoelectric assembly. Intervals between pulses are switch selectable. In addition, the normal programming can be overridden to spray fragrance for a set period even in the absence of air flow from the vent register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.