Fluid sprinkling – spraying – and diffusing – Terminal outlet formed between parts mounted for relative... – Axially movable outlet part
Patent
1996-05-02
1997-11-11
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Terminal outlet formed between parts mounted for relative...
Axially movable outlet part
239524, B05B 132
Patent
active
056854897
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a shower head as disclosed in the preamble of the succeeding claim 1.
For several years shower heads have been developed with a view to low water consumption ("saving showers"), in the range of 6 to 10 l/min. This consumption is usually based on normal water pressures, which are 3 to 5 kp/cm.sup.2. As the consumption is at a "saving level" already at such normal pressures, a lower pressure will cause that the consumption will be lower than desired at low pressures. The water consumption is reduced to below the "limit of comfort" and causes negative attitudes to such shower heads.
Shower heads able to cause pulsating spray have been known for a long time. These are based on the use of a propeller-like rotor inside the shower head. Such shower heads can usually be converted between a normal condition for an even shower and the pulsating shower.
Such shower heads are usually designed for a high water consumption, and they are complicated.
In the development of shower heads for low water consumption, the aim has been to achieve low water consumption and has not considered other factors. No accounting has been taken of the consequences with respect to effect, comfort and the nature of the water flowing out of the shower heads. This has, on the one hand, in most of the cases caused low water velocities and a less favourable water structure and on the other hand designs which may cause clogging due to impurities or lime in the water.
The present invention brings about a shower head which causes a low water consumption at normal water pressure, which in a less degree than known "saving showers" reduces the water consumption at low water pressure and which additionally can be converted between a normal condition for showering and a condition for pulsating showering ("massage showering"), whereby the latter condition is achieved without any rotating element in the shower head.
The shower head according to the invention is characterized by the features appearing from the succeeding claim 1.
When the mouthpiece has been screwed approximately to a maximum into the support and the deflector element, consequently, is approximately in its greatest distance from the mouth of the channel, relatively large water drops having a relatively large mutual distance and a large velocity are formed, which leave the deflector element in a conical surface. Some of the water hits the wall in the cavity, and the water is reflected from the wall and leaves the mouthpiece and forms a relatively homogeneous structure.
When the mouthpiece is screwed further from the support, so that the deflector element is closer to the mouth of the channel, an increased choking will take place at the deflector element, but this position is well suited for low water pressures, in that a relatively larger water consumption and a comfortably feeling water velocity is achieved. When the mouthpiece is screwed approximately to its terminal position away from the support, and the deflector element, consequently, is in a maximum proximity to the mouthpiece, instability of the water will occur, and it will flow out in a pulsating manner, i.e. that the drops will flow out in "clusters".
That the surface surrounding the deflector element mainly is conical and converges outwardly from the bottom surface in the mouthpiece is of importance to the mode of flow past the deflector element.
In an embodiment of the invention a feature has been developed which has been found to be particularly advantageous, this being that the stem is conical, at least in the portion situated remote from the deflector element. That the stem is conical has a direct influence on the cross section of the water flow at the top of the channel. This cross section will be at a minimum when the mouthpiece has been screwed maximally into the support. At the same time the deflector element is in its maximum distance from the mouth of the channel. Hence, the major part of the choking will take place at the top of the channel. The effect of this is the above mentioned re
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patent: 3826427 (1974-07-01), Rutherford
patent: 4095747 (1978-06-01), Anderson
patent: 4221335 (1980-09-01), Shames et al.
patent: 4342426 (1982-08-01), Gagliardo
Bloom Leonard
Ganey Steven J.
Kashnikow Andres
Norwec A/S
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