Fluid sprinkling – spraying – and diffusing – Slow diffusers – With support for porous or apertured encasing means
Patent
1979-05-23
1981-03-24
Reeves, Robert B.
Fluid sprinkling, spraying, and diffusing
Slow diffusers
With support for porous or apertured encasing means
220 70, 239 60, A61L 904
Patent
active
042575583
ABSTRACT:
A dispenser is designed to provide a visual indication whenever the remaining quantity of contents to be dispensed is less than a predetermined amount. The dispenser is particularly suitable for dispensing vaporizable material such as room deodorants or insecticides. The dispenser is made of lightweight plastic material and has internal space to hold the vaporizable material and air openings for permitting the material to slowly dissipate into the surroudning environment. It is designed, however, to be physically unstable in the absence of a predetermined weight of the vaporizable material. Thus, when the dispenser is full, or partially full, it will stand up, but when the vaporizable material is almost depleted, that is, below the predetermined weight, the dispenser will not stand and falls over, indicating to the user that either a refill is needed or the dispenser must be replaced. The dispenser includes a housing and a supporting base. The housing contains the vaporizable material to be dispensed and has air outlets through which the vapors can pass. The structure of the housing is such that when the weight of the material contained therein is less than a predetermined weight, the center of gravity of the housing and the contents is not above the supporting base, but when the weight of the contents is greater than the predetermined value, the center of gravity of the housing and the contents is shifted above the supporting base.
REFERENCES:
patent: 2707930 (1955-05-01), Miles
patent: 3239145 (1966-03-01), Russo
patent: 3805995 (1974-04-01), Lebel et al.
patent: 4040568 (1977-08-01), Mason et al.
Church Gene A.
Reeves Robert B.
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