Diffusion device
US7840123B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01M1/2077
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A diffusion device includes a housing and an opening in the housing adapted for insertion of a container having an active material therein and a wick extending therefrom. The device further includes a heater disposed in a rear portion of the housing and spaced from the wick when a container is inserted into the housing. A vent is disposed in a front portion of the housing. An active material diffusion-interference member is disposed directly above and axially aligned with the wick when the container is inserted into the device, wherein the diffusion-interference member inhibits diffusion of the active material from the housing such that heat generated by the heater is trapped around the wick, thus increasing volatilization and dispersion of the active material from the diffusion device as compared to a diffusion device that does not have a diffusion-interference member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.