Fluid sprinkling – spraying – and diffusing – Liquid sprayer for transparent panel
Patent
1996-07-12
1999-02-02
Morris, Lesley D.
Fluid sprinkling, spraying, and diffusing
Liquid sprayer for transparent panel
B05B 110
Patent
active
058653767
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a nozzle housing for a spraying device of a windshield washer system with multiple nozzles.
BACKGROUND OF THE INVENTION
DE-OS 39 07 980 discloses a windscreen washer system with a spraying device comprising several nozzles made of elastic material. Because the direction of the jet coming from the nozzle elements should be adjustable, they are contained in movable nozzle units arranged in a common nozzle housing. The movability of the nozzle elements requires a relatively complicated structure of the nozzle housing.
DE-OS 35 03 496 discloses a nozzle housing with a nozzle that is achieved by a simple bore through the wall of the nozzle housing, the bore being then connected to a central channel. The execution of the bores requires a considerable expenditure e of time and work. Furthermore, the bores must have a certain diameter and it is difficult to clean them when they are clogged.
DE-OS 18 00 013 discloses a nozzle housing made of elastic material so that the nozzle can expand under the pressure of the cleaning liquid to eject dirt particles. The function of this nozzle housing is similar to that described in DE-OS 30 07 980, but is applicable for a single nozzle.
According to U.S. Pat. No. 3,940,068 the nozzles for a spraying device are formed by inserting a cover-type nozzle element into the nozzle housing which represents the completing part of the channel walls being provided as open channels on the surface of the nozzle housing. The advantage of this configuration is in particular, that the channels can be executed in a comparatively simple manner and that it is possible to clean the outlets of the nozzles without difficulty by simply removing the nozzle element for a short time. A disadvantage of the nozzle housing known from U.S. Pat. No. 3,940,068 is that the nozzles have a fixed diameter and that it is not possible to clean them when the nozzle element is fastened in the nozzle housing in order to prevent an inadvertent removal.
Aim of the present invention is to create a nozzle by simple means the aperture of which depends on the pressure of the sprayed cleaning liquid. The particular advantage of such nozzles is that they are self-cleaning since the obstructing particles can be ejected through the opening nozzle due to the increasing pressure of the obstructing particles. Furthermore, such nozzles can be configured in such a way that they are closed in normal conditions so that the antifreeze cannot evaporate and any ice formations which form thereon are blown off under the pressure of the cleaning liquid by means of the movable nozzle element.
The present invention consists of a part of the nozzle being formed by the housing itself, while the movable part of the nozzle is formed by a section of the elastic member deforming under the pressure of the cleaning liquid. Thus it is possible to form one or even several nozzles only by means of a single elastic member, preferably an elastic seal, which abuts on a surface, particularly the edge of the aperture of the nozzle housing, and opens the way for the liquid by deforming under the pressure of the cleaning liquid.
With this embodiment of the present invention, the same effect as described in DE-OS 39 07 980 with regard to the duckbill-type nozzle elements is achieved by simple means. If a major surface shall be moistened with liquid for the washing procedure it is known to arrange several nozzles at a certain distance from each other on the nozzle housing (see, for example, DE-OS 39 07 980).
Thus, a single elastic member, preferably in a flat seal, forms a part of all side walls of all desired nozzles. According to the present invention, several nozzles can therefore be formed by means of a single seal which results in a relatively simple and cheap construction of a multiple nozzle unit.
The single nozzles can be distributed circularly on the circumference of a nozzle element. A particularly simple construction is achieved by the present invention due to the cylindrical shape, the nozzle eleme
REFERENCES:
patent: 3940068 (1976-02-01), Mohnach et al.
patent: 5074471 (1991-12-01), Baumgarten et al.
Krizek Oldrich
Langenfelder Frank
Oehler Gerhard
Schmid Eckhardt
ITT Automotive Europe GmbH
Lewis J. Gordon
Morris Lesley D.
Twomey Thomas N.
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