Electric resistance heating devices – Heating devices – Vaporizer
Reexamination Certificate
2000-02-29
2001-08-14
Walberg, Teresa (Department: 3742)
Electric resistance heating devices
Heating devices
Vaporizer
C422S125000
Reexamination Certificate
active
06275651
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an apparatus for emitting scents.
BACKGROUND OF THE INVENTION
An apparatus is known (German utility model 93 08 368) for emitting scents. The known apparatus has an approximately waist-high column-shaped housing which is placed on the floor. The metering pump is formed by a hose pump connected via hoses with the storage vessel and evaporation dish. Such a hose pump is also provided in German utility model 298 13 461 having an elongate housing to be fastened to a wall or ceiling.
Known scent emitting apparatuses have proven useful by and large but they are rather voluminous. In addition, the scent solutions are sometimes quite aggressive so that the hose pump and hoses can be damaged with time.
SUMMARY OF THE INVENTION
The object of the invention is to provide a space-saving, robust, simply constructed scent emitting apparatus.
In the inventive apparatus, a metering pump is formed by a conveying or screw spindle driven by an electric motor and rotating in a tubular housing, the tube extending from the storage vessel into the bottom of the evaporation dish. The conveying spindle and the tube can thus be made of robust materials, such as metal, or a wear-resistant plastic stable to the scent solution. One can thus dispense completely without hoses coming in contact with the scent solution.
Since an electric motor with low power and thus small overall volume suffices to convey scent solution with the screw spindle, the electric motor for driving the screw spindle is preferably disposed between the evaporation dish and the fan.
The storage vessel can thus be disposed directly, or at least at a small distance, below the evaporation dish. The housing of the inventive apparatus thus has low height.
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patent: 4603030 (1986-07-01), McCarthy
patent: 5071621 (1991-12-01), Tokuhiro et al.
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patent: 6050025 (2000-04-01), Wilbanks
patent: 6090349 (2000-07-01), Hirano
patent: 6134826 (2000-10-01), Mah
patent: 93 08 368.8 U (1993-09-01), None
patent: 298 13 461.6 U (1998-07-01), None
patent: 993 884 (1965-06-01), None
patent: 956770 (1997-03-01), None
Fastovsky Leonid
Flynn ,Thiel, Boutell & Tanis, P.C.
Walberg Teresa
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