Patent ID: 7731102

Claim:
An air freshener device that emits fragrance through the evaporation of a fragrance-containing fluid comprising: a container, comprising a particular volume of the fragrance-containing fluid having a fluid level within the container; a wick disposed partially in, and partially out of the fragrance-containing fluid, the wick having an immersion section immersed in the fluid so as to displace a displacement volume of fluid and a non-immersion section extending outward from a surface of the fluid, the immersion and non-immersion sections being disposed on opposite lateral ends of the wick; the wick further comprising a displacement portion and a wicking portion, the displacement portion being configured so that when the immersion section is immersed in the fluid, the displacement portion displaces a desired first volume of fluid and the wicking portion being configured to wick a second volume of fluid from the immersion section to the non-immersion section, the displacement portion and the wicking portion being designed to achieve a ratio between the displaced first volume of fluid and the wicked second volume of fluid in a range of about 0.95 and 1.05 whereby the fluid level remains substantially unchanged after immersion of the immersion section in the fluid, wherein the displacement portion is impervious to the fragrance-containing fluid.