Fluid sprinkling – spraying – and diffusing – Including supply holder for material – Moving solid surface engages material to be sprayed
Patent
1990-01-05
1992-09-15
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including supply holder for material
Moving solid surface engages material to be sprayed
239337, B05B 9043
Patent
active
051470870
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a manually operable discharging apparatus for media.
SUMMARY OF THE INVENTION
Attempts have already been made in the most varied ways to bring about a very fine atomization of media, particularly liquids, in such discharging apparatuses, whose complete operating energy is to be applied by manual operation. It has been found that it has not been possible hitherto therewith to bring about such a fine atomization as can e.g. be achieved by discharging apparatuses filled with a propellant gas charge.
An object of the invention is to provide a manually operable discharging apparatus, which permits a much finer atomization than hitherto, particularly an atomization with droplet sizes below 50 to 70 .mu.m.
For achieving this object a manually operable discharging apparatus is inventively characterized by an at least two-stage atomizer for the additional and therefore further and finer atomization of a preatomized medium flow with a nozzle air flow or a separate gas flow in the vicinity of the discharge nozzle.
As a result the preatomized medium can be subject to such a great acceleration, that its droplets can be broken down into even finer droplets under the energies which occur. If e.g. use is made of the Laval effect, an acceleration to supersonic speed is possible, which permits an extremely fine atomization or nebulization of the medium.
The compressed air is appropriately conveyed through the discharge nozzle at least a very short time prior to the medium, after which the medium is supplied in preatomized form by means of a separate pipe in the vicinity of the discharge nozzle of the already flowing compressed air. It is correspondingly also advantageous towards the end of the atomization process to break off firstly the flow of the medium and then, e.g. after cleaning the discharge nozzle by blowing free, also the flow of compressed air.
For assisting the atomizing or nebulizing action in one or both nozzle stages are provided corresponding nozzle profiles, whirling or swirling means and in the discharge direction narrower and/or wider-becoming pipe or duct sections, as well as similar measures.
A particularly advantageous further development of the invention comprises providing a manually operable compressed air pump associated with the discharge nozzle and which is connected by means of a compressed air duct to said discharge nozzle, the two pumps being constructable in such a way that they can be operated separately with two hands or preferably together with one hand and are constructionally combined. This leads to a very compact and operationally reliable discharging apparatus, which in the case of high discharge energy ensures an ultrafine atomization of the medium.
In a different construction, it is also conceivable to substantially only atomize the liquid by the compressed air flow, instead of or in scarcely preatomized form.
BRIEF DESCRIPTION OF THE DRAWINGS
These and further features of preferred further developments of the invention can be gathered from the claims, description and drawings, whereby the individual features can be realized either alone or in the form of combinations in an embodiment of the invention and in other fields and can in themselves represent advantageous constructions, for which protection is here claimed. Embodiments of the invention are described hereinafter relative to the drawings, wherein:
FIG. 1 shows an inventive discharging apparatus in elevation.
FIG. 2 shows an axial section through part of the discharging apparatus according to FIG. 1 on a larger scale.
FIG. 3 shows a detail of FIG. 2 on a larger scale, but in a different piston unit position.
FIG. 4 shows a detail in the vicinity of the discharge nozzle of FIG. 3 on a still larger scale.
FIG. 5 shows another embodiment in a representation corresponding to FIG. 4.
FIG. 6 shows another embodiment in a representation corresponding to FIG. 4.
FIG. 7 shows a further discharge nozzle in axial section.
FIG. 8 shows a section roughly along line VIII--VIII of F
REFERENCES:
patent: 2593884 (1952-04-01), Ifield
patent: 3945574 (1976-03-01), Polnauer et al.
patent: 4179049 (1979-12-01), Umstead
patent: 4203552 (1980-05-01), Hayes
Ing. Erich Pfeiffer GmbH & Co. KG
Kashnikow Andres
Morris Lesley D.
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