Electric resistance heating devices – Heating devices – Vaporizer
Reexamination Certificate
1999-12-22
2001-08-21
Paik, Sang (Department: 3742)
Electric resistance heating devices
Heating devices
Vaporizer
C392S395000, C261SDIG006
Reexamination Certificate
active
06278840
ABSTRACT:
OBJECT OF THE INVENTION
The present invention refers to an evaporator device of volatile products, be they environmental products or insecticide products, of the type which use electroheating resistors to improve the evaporation or volatilization of the product, and of those which use a wick which absorbs said product from the corresponding container vessel up to the area of influence of the electroheating resistor.
BACKGROUND OF THE INVENTION
Evaporators of volatile products which are provided with a vessel in which the product in question is housed are well known, whether dealing with an environmental product or with an environmental insecticide, a wick being extended between the bottom of said vessel and the electroheating resistor through which said product rises to reach the area of influence of the resistor.
In this type of devices and as is obvious, the intensity of the evaporation or diffusion of the product is constant, whilst product exists in the container vessel.
However, in practice, it may be desirable to decrease or increase as desired, in specific moments, the intensity of the environmental supply of the product. In this sense, a solution is known which is included in Utility Model 9002819, according to which, the electroheating resistor is assembled with floating nature in the centre of the device, in such a manner, that by means of guides and of a manual activating mechanism, it is capable of moving axially, varying its level of confrontation to the upper end of the wick and, consequently, varying its effectiveness as heating element and a level of diffusion of the product.
However, this solution results to be structurally complex since it requires a resistor assembled on a special support, moveable, which must be related to the plug socket through flexible cables, which permit its axial movement, all of which, increases the difficulty and makes its constructive process expensive.
DESCRIPTION OF THE INVENTION
The device proposed by the invention solves in a totally satisfactory manner the previously indicated problem, based on a completely different concept, specifically based in maintaining static the electroheating resistor and to achieve the displacement of the vessel, and consequently the wick which is associated to the same.
More specifically, it has been provided, that said vessel presents at least one revolution sector in which a helicoidal groove is established which determines a large pitch thread, whilst in the casing of the device, holder of unmoveable nature of the electroheating resistor, at least one pair of opposed teeth are established, functioning as complementary threads, which determine, for the container vessel, an accused axial displacement, when a rotational movement is administered to the same.
According to another of the characteristics of the invention, said helicoidal groove of the vessel may present closed ends, in such a manner that they constitute rotation restricting stops in one and another direction, which establish the two limit positions of the maximum and minimum intensity of evaporation, at the same time that said opposed attachment and displacement teeth of the vessel as regards the casing, are assembled on elastically deformable arms which, with a specific effort, permit the assembly and disassembly of said vessel when it is necessary to replace the same. However, said rotation restricting stops may be obtained by other means, such as for example, by means of a hook acting on a lip of the vessel
Given that the container vessel is generally constructed into a bottle provided with a screw stopper for a sealed closure during the storage prior to its consumption, it has been foreseen that, optionally, it may be the actual thread corresponding to the stopper of the container, which replaces the previously indicated helicoidal groove, coupling the teeth of the casing to said thread, in which case, the same effect is obtained as in the previous case, though with a slower axial movement, which requires a wider rotational movement, requiring the existence of complementary means to prevent the total accidental uncoupling of the vessel as regards the casing. It is also possible that the helicoidal large pitch groove shall be superposed on the actual thread of the stopper.
In any case, it is achieved that as from a fixed casing in which a resistor or set of also fixed electroheating resistors are established, the intensity of evaporation can be adjusted as desired, with only the supplying of a rotational movement to the container vessel of the product, which additionally is more easily coupled and uncoupled in the centre of said casing.
According to another of the characteristics of the invention it has been provided that the device include indicating means of the level of intensity of evaporation, which act depending on the relative position between the casing of the device and the body of the container, either detecting the axial position of the latter, or else its angular positioning, in any case, as regards the fixed casing.
REFERENCES:
patent: 3966082 (1976-06-01), Hopkins
patent: 4032028 (1977-06-01), Reiss et al.
patent: 4298129 (1981-11-01), Stull
patent: 5038394 (1991-08-01), Hasegawa et al.
patent: 5222186 (1993-06-01), Schimanski et al.
patent: 0362397 (1990-04-01), None
patent: 0420144 (1991-04-01), None
patent: 0736248 (1996-10-01), None
patent: 2194442 (1988-03-01), None
patent: 9819526 (1998-05-01), None
DBK Espana S.A.
Paik Sang
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