WO2001032317A1 - Spray technology improvement - Google Patents

Spray technology improvement Download PDF

Info

Publication number
WO2001032317A1
WO2001032317A1 PCT/GB2000/004252 GB0004252W WO0132317A1 WO 2001032317 A1 WO2001032317 A1 WO 2001032317A1 GB 0004252 W GB0004252 W GB 0004252W WO 0132317 A1 WO0132317 A1 WO 0132317A1
Authority
WO
WIPO (PCT)
Prior art keywords
members
orifice
meeting
spray
nozzle
Prior art date
Application number
PCT/GB2000/004252
Other languages
French (fr)
Inventor
Keith Peter Laidler
Original Assignee
Incro Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Incro Limited filed Critical Incro Limited
Priority to AU11619/01A priority Critical patent/AU1161901A/en
Publication of WO2001032317A1 publication Critical patent/WO2001032317A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/525Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles by increasing the cross section of the discharge openings

Definitions

  • This invention relates to a spray nozzle and to a method of forming a spray nozzle, especially, but not exclusively, to self-cleaning spray nozzles.
  • Existing technology to produce a spray from spray nozzles or aerosol nozzles and similar devices have orifices that are uniform, for example a round orifice or an orifice with the shape of an eye.
  • An example of a prior art spray nozzle is a one piece moulding of plastics material having a uniform orifice, commonly used in a car wash.
  • the dimensions of the orifice can be small and may require a pin to create the orifice when the spray nozzle is moulded. This pin is of correspondingly small dimensions and may be susceptible to damage.
  • a spray nozzle may consist of a number of components, for example a ceramic insert may be placed into a plastics material outer body to combine the various physical properties for some technological or financial benefit.
  • An additional example is a self-cleaning spray nozzle, which have a number of surfaces that come together to form the orifice. In some self cleaning spray nozzles these surfaces need to be repeatedly brought together and separated, thus cleaning the spray nozzle. It is sometimes a problem to accurately align the surfaces that come together in such self cleaning spray nozzles. Such misalignment causes the spray produced by the nozzle to become mis-shaoen. A further problem is that it is difficult to make two shapes identical. This is particularly so with curves of a slight radius (for example elliptical, or eye shaped curves) . Problems arise in prior art spray nozzles due to mismatch of machined recesses, which are brought together to provide a spray orifice. These mismatches cause deformation of the shape of the spray and also cause hard edges and side sprays .
  • a spray nozzle having a spray orifice formed by meeting surfaces of at least first and second members, the meeting surfaces of the members being so shaped that the shape of the orifice formed by their meeting is substantially constant despite any misalignment of the members during their mutual approach.
  • An advantage of such a spray nozzle is that it provides a spray of constant properties and shape that is not affected, or affected as much, by misalignment of the members, and is easier to fabricate than prior art spray nozzles.
  • the spray pattern from such spray nozzles should be totally uniform. This in conventional technology is partly achieved by producing an accurate uniform orifice. As the flow rates reduce, the inaccuracies become more of a problem. It is more difficult to produce uniform orifices if they are small.
  • the tools necessary to engineer the product influence the design. For example a cutting tool will have a physical size and that size will leave a radius. With small orifices, the radius created by the cutting tool used to produce the orifice become greater than the size of the corners required in an orifice such as an eye shape. This is only one example of the difficulty of engineering smaller orifices and this invention is not restricted to this only.
  • the spray nozzle is of the self-cleaning variety in which the first and second contact members are arranged to temporarily come together and form the orifice.
  • Such a nozzle is advantageous because it has a reduced susceptibility to misalignment of the members.
  • the members of the spray nozzle are arranged to substantially remain in contact with one another.
  • a nozzle is advantageous because it may be easier to fabricate than prior art nozzles . For instance it may not be necessary to require a pin to form the orifice during moulding, which as discussed above is susceptible to damage when of small dimensions.
  • the members may be adhered to one another so that they cannot be readily separated from one another.
  • the members may be adhered by any one or more of the following: welding, adhesive, by being mechanically fastened together, etc.
  • One of the members may have a substantially even meeting surface, and the other member may have a meeting surface with a recess therein arranged to provide the orifice in combination with the even surface.
  • An even surface is advantageous since it is easy to fabricate, and provides a surface along which lateral displacement of a recess in the other surface does not matter.
  • Even is intended to mean a surface having a constant curvature, which may be substantially zero curvature.
  • Even may cover any one of the following shapes: substantially flat, substantially planar, substantially elliptical, substantially circular, or any other arc.
  • the provision of a substantially flat surface produces a useful spray shape, and offers a practical way of making small holes.
  • each of the meeting surfaces may be fabricated from a number of even surfaces.
  • one of the meeting surfaces may be fabricated from two or more substantially flat surfaces, two or more planar surface, or two or more curved surfaces.
  • One or more of the meeting surfaces may be shaped such that a self- centering action is provided as the surfaces meet. This is convenient since it helps to prevent misalignment of the orifice forming meeting- surfaces and so helps to alleviate the problems discussed hereinbefore.
  • the orifice formed by the coming together of meeting surfaces may be provided substantially at an external surface of the spray nozzle. Alternatively, or additionally, the orifice may be provided at an internal region of the spray nozzle.
  • the spray nozzle may be formed from a plastics type material.
  • polypropylene is used, however, many different types of plastics material may be suitable.
  • the spray nozzle may be arranged to spray many different types of liquid, including, but not limited to, any of the following: water, cleaners, paints, aerosols (for example air freshener, anti-perspirant, etc.) , solutions of any of the following.
  • a method of forming a spray nozzle spray orifice comprising forming at least two members, and bringing the members together to meet, each member having a meeting surface shaped such that when they meet, the shape of the orifice is substantially unaffected by misalignment of the members as they are brought together.
  • Such a method is advantageous because it is easier to fabricate the nozzle than prior art methods, and it will generally provide a more predictably shaped spray.
  • the method may comprise shaping the members such that they align relative to one another as they are brought together to meet.
  • the method comprises providing one of the members with an even meeting surface, and may comprise providing a recess in the meeting surface of the other member.
  • This structure is advantageous since the shape of the spray orifice is unaffected by alignment of the recess along the even surface.
  • the method may comprise adhering the first and second members to one another such that they are substantially permanently, (or may be releaseably) connected to one another.
  • the method may comprise temporarily bringing the first and second members together to temporarily form the orifice.
  • Figure 1 shows a prior art spray orifice within a spray nozzle
  • Figure 2 shows a spray orifice according to the invention within a spray nozzle
  • Figure 3 shows one embodiment of the present invention in which an orifice is formed from two members coming together, the members being shown separated from one another;
  • Figure 4 shows the embodiment of Figure 3 but with the members in contact with one anther
  • Figures 5 and 6 show a second embodiment of the present invention with the members separated and in contact respectively;
  • Figures 7 and 8 show a third embodiment of the present invention with the members separated and in contact respectively;
  • Figures 7a and 8a show a variation of the embodiment shown in Figures 7 and 8;
  • Figures 9 and 10 show a fourth embodiment of the present invention with the members separated and in contact respectively;
  • Figures 10 and 11 show a fifth embodiment of the present invention with the members separated and in contact respectively;
  • Figure 13 shows a sectional plan view of a spray nozzle showing possible locations for the orifice
  • Figure 14 schematically shows an arrangement for providing members that can be brought together to form the orifice
  • Figure 15 schematically shows one arrangement for providing the embodiment of Figure 13;
  • Figure 16 shows a further embodiment of a spray orifice provided by the present invention.
  • Figure 1 shows a portion of a prior art spray nozzle in which there is an orifice 2 at a central region.
  • the orifice 2 has an elliptical or eye shape . It has been found that changing the shape of the orifice 4 to that shown in Figure 2 (an ellipse divided in half along its major axis having one planar side) , does not detrimentally affect the spray produced by the spray nozzle and indeed provides a useful spray shape and offers a practical way of producing small holes.
  • the orifice 4 shown in Figure 2 is formed by the bringing together of first 6 and second members 8.
  • Each of these members 6, 8 has a meeting surface 10, 12, which comes into contact with the meeting surface of the other member when the members are brought together.
  • the first member 6 has an even (or substantially flat) , planar, meeting surface 12, whilst the second member 8 has a recess 14 therein.
  • the recess 14 is semi-circular such that when the two members are brought together a semi-circular orifice 16 is formed.
  • the two members 6, 8 are adhered together such that a permanent (or semi-permanent) spray orifice 16 is formed.
  • the arrangement is used in a self-cleaning spray nozzle in which fluid pressure is arranged to bring the first 6 and second 8 members together. Thus, when the fluid pressure is released the first 6 and second 8 members separate once again.
  • FIG. 14 One particular arrangement 17 for providing the first 6 and second 8 members in a spray nozzle is shown in Figure 14.
  • Each of the first 6 and second 8 members are connected to an annular plate 18 by an arm 20, 22. Fluid is arranged to flow through the hole 24 in the annular plate such that a force f is exerted on the arrangement.
  • a housing is provided for the arrangement that has sloped walls that cause the first 6 and second 8 members to come together as the force f causes the arrangement 17 to move relative to the housing. When the fluid pressure is removed the resilient nature of the material from which the arrangement is fabricated causes the first 6 and second 8 members to separate.
  • the recess 14 can be seen in the second member 8.
  • the spray orifice can be provided in different locations of the spray nozzle 25, examples of which are shown in Figure 13. It is possible to provide a spray orifice 26 substantially on an external surface of the spray nozzle 25, or an orifice 27 can be provided at an internal region 28 of the spray nozzle 25. As can be seen from Figure 13 the internal spray orifice 27 provides an entry to a chamber 30, which has an exit to the orifice 26 substantially on an external surface. Either of, or both of the orifices 26, 27 could be provided according to the invention.
  • fluid passes along a bore 32 in a direction up out of the page.
  • a channel 34 connects this bore 32 to the internal orifice 27.
  • One way of providing the internal orifice as shown in Figure 13 is via the arrangement shown in Figure 15.
  • Two separable portions 36, 38 provide the spray nozzle 35, which when brought together form the channel 34, the chamber 30, the internal orifice 27 and the external orifice 26.
  • the nozzle 35 if fabricated from a plastics material and the two portions 36, 38 are hingedly attached to one another. In other embodiments it would be possible to provide the two portions separately.
  • Figures 3 and 4 show a semi-circular spray orifice 16 that is formed by the bringing together of two members 6, 8. It is possible to form other shapes of orifice.
  • Figures 5 and 6 show an orifice having the same shape as the half eye shape of Figure 2.
  • the recess 14 in the second member 8 is an ellipse that has been halved along its major axis (or half and eye shape) .
  • Figures 7 and 8 show another example of how the first 6 and second 8 members can be shaped.
  • the first member 6 has even surface, but the meeting surface 10 has a concave curvature rather than planar as in Figures 3 to 6. (The curvature could also of course be convex) .
  • the meeting surface 12 is curved in a complementary manner so that members 6 and 8 can engage one another.
  • the recess 16 in the second member 8 can be any shape to provide the necessary spray characteristics.
  • Figure 8 shows the arrangement of Figure 7 such that the first and second members are in contact.
  • Figures 7a and 8a show a slight modification to the embodiment shown in Figures 7 and 8 wherein the meeting surfaces have a much greater curvature.
  • Figures 9 and 10 show yet another embodiment.
  • the meeting surface 10 of the first member 6 comprises two planar surface portions 40, 42 that meet at a central region 44 of the meeting surface 10. There is no recess in these planar portions.
  • the planar surface portions 40, 42 are arranged in a concave manner with respect to the first member 6, but could equally be arranged in a convex manner.
  • the meeting surface 12 of the second member is again arranged in a complementary manner to the meeting surface 10.
  • the recess 16 in the second member 8 could be of any shape, but in the Figures a semi-circle has been shown.
  • Figure 10 shows the embodiment of Figure 9 in a closed arrangement.
  • FIG. 11 A further embodiment is shown in Figure 11.
  • the meeting surface 12 of the first member 6 comprises three planar portions 46,48,50, and the meeting surface 12 of the second member is complementarily shaped.
  • the meeting surface 12 is concave it could equally well be a convex surface.
  • Figures 7 to 12 provide a spray orifice 16 of substantially constant shape even though there may be misalignment of the first 6 and second 8 members, they may also provide a self centring action due to the angular nature of the meeting surfaces. That is, as the first 6 and second 8 members come in to contact, the angled meeting surfaces cause lateral forces to be produced that tend to align the first 6 and second 8 surfaces.
  • more than two members can be brought together to form the spray orifice.
  • three members 52, 54, 56 come together to form the spray orifice 58.
  • each of the members 52, 54, 56 have even, planar, meeting surfaces, they could equally have even, curved, or uneven surfaces as described in relation to Figures 7 to 12.
  • the invention may comprise an improvement to spray technology with a new shape orifice which has one side of the orifice as a flat surface.
  • the invention may comprise providing an improvement to self- cleaning spray nozzles by utilising a flat surface on one side of the orifice to remove problem of accurately locating the interacting surfaces which must align to create the spray producing orifice.

Landscapes

  • Nozzles (AREA)

Abstract

A spray nozzle having a spray orifice (16) formed by meeting surfaces (10, 12) of at least first (6) and second (8) members, the meeting surfaces (10, 12) of the members being so shaped that the shape of the orifice (16) formed by their meeting is substantially constant despite any misalignment of the members (6, 8) during their mutual approach. Such a nozzle is particularly applicable to self-cleaning spray nozzles in which the members (6, 8) temporarily come together, but is applicable to embodiments in which the members are adhered to one another.

Description

SPRAY TECHNOLOGY IMPROVEMENT
This invention relates to a spray nozzle and to a method of forming a spray nozzle, especially, but not exclusively, to self-cleaning spray nozzles.
Existing technology to produce a spray from spray nozzles or aerosol nozzles and similar devices have orifices that are uniform, for example a round orifice or an orifice with the shape of an eye. An example of a prior art spray nozzle is a one piece moulding of plastics material having a uniform orifice, commonly used in a car wash. The dimensions of the orifice can be small and may require a pin to create the orifice when the spray nozzle is moulded. This pin is of correspondingly small dimensions and may be susceptible to damage.
Occasionally a spray nozzle may consist of a number of components, for example a ceramic insert may be placed into a plastics material outer body to combine the various physical properties for some technological or financial benefit.
It is also possible to include devices internal to a spray nozzle that cause the dispensed fluid to spin prior to exiting the spray nozzle. Thus, the internal device changes the nature of the produced spray.
An additional example is a self-cleaning spray nozzle, which have a number of surfaces that come together to form the orifice. In some self cleaning spray nozzles these surfaces need to be repeatedly brought together and separated, thus cleaning the spray nozzle. It is sometimes a problem to accurately align the surfaces that come together in such self cleaning spray nozzles. Such misalignment causes the spray produced by the nozzle to become mis-shaoen. A further problem is that it is difficult to make two shapes identical. This is particularly so with curves of a slight radius (for example elliptical, or eye shaped curves) . Problems arise in prior art spray nozzles due to mismatch of machined recesses, which are brought together to provide a spray orifice. These mismatches cause deformation of the shape of the spray and also cause hard edges and side sprays .
It is an object of the current invention to provide a spray nozzle that reduces some of the problems of the prior art.
According to a first aspect of the invention there is provided a spray nozzle having a spray orifice formed by meeting surfaces of at least first and second members, the meeting surfaces of the members being so shaped that the shape of the orifice formed by their meeting is substantially constant despite any misalignment of the members during their mutual approach.
An advantage of such a spray nozzle is that it provides a spray of constant properties and shape that is not affected, or affected as much, by misalignment of the members, and is easier to fabricate than prior art spray nozzles.
Further, there are several commercial advantages to this invention. The spray pattern from such spray nozzles should be totally uniform. This in conventional technology is partly achieved by producing an accurate uniform orifice. As the flow rates reduce, the inaccuracies become more of a problem. It is more difficult to produce uniform orifices if they are small. The tools necessary to engineer the product influence the design. For example a cutting tool will have a physical size and that size will leave a radius. With small orifices, the radius created by the cutting tool used to produce the orifice become greater than the size of the corners required in an orifice such as an eye shape. This is only one example of the difficulty of engineering smaller orifices and this invention is not restricted to this only.
When several surfaces are required to interact, such as two surfaces coming together in self-cleaning nozzles to create a uniform orifice, there are similar engineering problems. In addition there is a further problem in that the two surfaces must lineup exactly. Whilst this is applicable to small and large orifices, the smaller they become, the larger the problem.
Conveniently, the spray nozzle is of the self-cleaning variety in which the first and second contact members are arranged to temporarily come together and form the orifice. Such a nozzle is advantageous because it has a reduced susceptibility to misalignment of the members.
In an alternative embodiment the members of the spray nozzle are arranged to substantially remain in contact with one another. Such a nozzle is advantageous because it may be easier to fabricate than prior art nozzles . For instance it may not be necessary to require a pin to form the orifice during moulding, which as discussed above is susceptible to damage when of small dimensions.
For example the members may be adhered to one another so that they cannot be readily separated from one another. The members may be adhered by any one or more of the following: welding, adhesive, by being mechanically fastened together, etc. One of the members may have a substantially even meeting surface, and the other member may have a meeting surface with a recess therein arranged to provide the orifice in combination with the even surface. An even surface is advantageous since it is easy to fabricate, and provides a surface along which lateral displacement of a recess in the other surface does not matter. Even is intended to mean a surface having a constant curvature, which may be substantially zero curvature. Even may cover any one of the following shapes: substantially flat, substantially planar, substantially elliptical, substantially circular, or any other arc.
Advantageously, the provision of a substantially flat surface produces a useful spray shape, and offers a practical way of making small holes.
Alternatively, or additionally, each of the meeting surfaces may be fabricated from a number of even surfaces. For example one of the meeting surfaces may be fabricated from two or more substantially flat surfaces, two or more planar surface, or two or more curved surfaces.
One or more of the meeting surfaces may be shaped such that a self- centering action is provided as the surfaces meet. This is convenient since it helps to prevent misalignment of the orifice forming meeting- surfaces and so helps to alleviate the problems discussed hereinbefore.
The orifice formed by the coming together of meeting surfaces may be provided substantially at an external surface of the spray nozzle. Alternatively, or additionally, the orifice may be provided at an internal region of the spray nozzle.
There may be more than two members that come together to provide the spray orifice. In particular 3,4,5,6,7, or more members may come together to form the spray orifice. Conveniently, the spray nozzle may be formed from a plastics type material. In one embodiment polypropylene is used, however, many different types of plastics material may be suitable.
The spray nozzle may be arranged to spray many different types of liquid, including, but not limited to, any of the following: water, cleaners, paints, aerosols (for example air freshener, anti-perspirant, etc.) , solutions of any of the following.
According to a second aspect of the invention there is provided a method of forming a spray nozzle spray orifice comprising forming at least two members, and bringing the members together to meet, each member having a meeting surface shaped such that when they meet, the shape of the orifice is substantially unaffected by misalignment of the members as they are brought together.
Such a method is advantageous because it is easier to fabricate the nozzle than prior art methods, and it will generally provide a more predictably shaped spray.
The method may comprise shaping the members such that they align relative to one another as they are brought together to meet.
Conveniently, the method comprises providing one of the members with an even meeting surface, and may comprise providing a recess in the meeting surface of the other member. This structure is advantageous since the shape of the spray orifice is unaffected by alignment of the recess along the even surface. The method may comprise adhering the first and second members to one another such that they are substantially permanently, (or may be releaseably) connected to one another.
Alternatively, the method may comprise temporarily bringing the first and second members together to temporarily form the orifice.
There now follows by way of example only a detailed description of embodiments of the invention with reference to the drawings of which:
Figure 1 shows a prior art spray orifice within a spray nozzle;
Figure 2 shows a spray orifice according to the invention within a spray nozzle;
Figure 3 shows one embodiment of the present invention in which an orifice is formed from two members coming together, the members being shown separated from one another;
Figure 4 shows the embodiment of Figure 3 but with the members in contact with one anther;
Figures 5 and 6 show a second embodiment of the present invention with the members separated and in contact respectively;
Figures 7 and 8 show a third embodiment of the present invention with the members separated and in contact respectively;
Figures 7a and 8a show a variation of the embodiment shown in Figures 7 and 8; Figures 9 and 10 show a fourth embodiment of the present invention with the members separated and in contact respectively;
Figures 10 and 11 show a fifth embodiment of the present invention with the members separated and in contact respectively;
Figure 13 shows a sectional plan view of a spray nozzle showing possible locations for the orifice;
Figure 14 schematically shows an arrangement for providing members that can be brought together to form the orifice;
Figure 15 schematically shows one arrangement for providing the embodiment of Figure 13; and
Figure 16 shows a further embodiment of a spray orifice provided by the present invention.
Figure 1 shows a portion of a prior art spray nozzle in which there is an orifice 2 at a central region. The orifice 2 has an elliptical or eye shape . It has been found that changing the shape of the orifice 4 to that shown in Figure 2 (an ellipse divided in half along its major axis having one planar side) , does not detrimentally affect the spray produced by the spray nozzle and indeed provides a useful spray shape and offers a practical way of producing small holes.
In one embodiment of the invention, shown in Figures 3 and 4, the orifice 4 shown in Figure 2 is formed by the bringing together of first 6 and second members 8. Each of these members 6, 8 has a meeting surface 10, 12, which comes into contact with the meeting surface of the other member when the members are brought together. The first member 6 has an even (or substantially flat) , planar, meeting surface 12, whilst the second member 8 has a recess 14 therein. In this embodiment the recess 14 is semi-circular such that when the two members are brought together a semi-circular orifice 16 is formed.
In some embodiments the two members 6, 8 are adhered together such that a permanent (or semi-permanent) spray orifice 16 is formed. In other embodiments the arrangement is used in a self-cleaning spray nozzle in which fluid pressure is arranged to bring the first 6 and second 8 members together. Thus, when the fluid pressure is released the first 6 and second 8 members separate once again.
One particular arrangement 17 for providing the first 6 and second 8 members in a spray nozzle is shown in Figure 14. Each of the first 6 and second 8 members are connected to an annular plate 18 by an arm 20, 22. Fluid is arranged to flow through the hole 24 in the annular plate such that a force f is exerted on the arrangement. A housing is provided for the arrangement that has sloped walls that cause the first 6 and second 8 members to come together as the force f causes the arrangement 17 to move relative to the housing. When the fluid pressure is removed the resilient nature of the material from which the arrangement is fabricated causes the first 6 and second 8 members to separate.
The recess 14 can be seen in the second member 8.
In different embodiments the spray orifice can be provided in different locations of the spray nozzle 25, examples of which are shown in Figure 13. It is possible to provide a spray orifice 26 substantially on an external surface of the spray nozzle 25, or an orifice 27 can be provided at an internal region 28 of the spray nozzle 25. As can be seen from Figure 13 the internal spray orifice 27 provides an entry to a chamber 30, which has an exit to the orifice 26 substantially on an external surface. Either of, or both of the orifices 26, 27 could be provided according to the invention.
In the embodiment shown in Figure 13 fluid passes along a bore 32 in a direction up out of the page. A channel 34 connects this bore 32 to the internal orifice 27.
One way of providing the internal orifice as shown in Figure 13 is via the arrangement shown in Figure 15. Two separable portions 36, 38 provide the spray nozzle 35, which when brought together form the channel 34, the chamber 30, the internal orifice 27 and the external orifice 26. In the embodiment shown in Figure 15 the nozzle 35 if fabricated from a plastics material and the two portions 36, 38 are hingedly attached to one another. In other embodiments it would be possible to provide the two portions separately.
Figures 3 and 4 show a semi-circular spray orifice 16 that is formed by the bringing together of two members 6, 8. It is possible to form other shapes of orifice.
For example Figures 5 and 6 show an orifice having the same shape as the half eye shape of Figure 2. In this example the recess 14 in the second member 8 is an ellipse that has been halved along its major axis (or half and eye shape) .
Figures 7 and 8 show another example of how the first 6 and second 8 members can be shaped. In this embodiment the first member 6 has even surface, but the meeting surface 10 has a concave curvature rather than planar as in Figures 3 to 6. (The curvature could also of course be convex) . The meeting surface 12 is curved in a complementary manner so that members 6 and 8 can engage one another. The recess 16 in the second member 8 can be any shape to provide the necessary spray characteristics. Figure 8 shows the arrangement of Figure 7 such that the first and second members are in contact.
Figures 7a and 8a show a slight modification to the embodiment shown in Figures 7 and 8 wherein the meeting surfaces have a much greater curvature.
Further embodiments are possible, and Figures 9 and 10 show yet another embodiment. In this embodiment the meeting surface 10 of the first member 6 comprises two planar surface portions 40, 42 that meet at a central region 44 of the meeting surface 10. There is no recess in these planar portions. The planar surface portions 40, 42 are arranged in a concave manner with respect to the first member 6, but could equally be arranged in a convex manner. The meeting surface 12 of the second member is again arranged in a complementary manner to the meeting surface 10. The recess 16 in the second member 8 could be of any shape, but in the Figures a semi-circle has been shown. Figure 10 shows the embodiment of Figure 9 in a closed arrangement.
A further embodiment is shown in Figure 11. In this embodiment the meeting surface 12 of the first member 6 comprises three planar portions 46,48,50, and the meeting surface 12 of the second member is complementarily shaped. Although the meeting surface 12 is concave it could equally well be a convex surface.
Although the embodiments of Figures 7 to 12 provide a spray orifice 16 of substantially constant shape even though there may be misalignment of the first 6 and second 8 members, they may also provide a self centring action due to the angular nature of the meeting surfaces. That is, as the first 6 and second 8 members come in to contact, the angled meeting surfaces cause lateral forces to be produced that tend to align the first 6 and second 8 surfaces.
In yet another embodiment, as shown in Figure 16 more than two members can be brought together to form the spray orifice. In the example shown three members 52, 54, 56 come together to form the spray orifice 58. Although each of the members 52, 54, 56 have even, planar, meeting surfaces, they could equally have even, curved, or uneven surfaces as described in relation to Figures 7 to 12.
The invention may comprise an improvement to spray technology with a new shape orifice which has one side of the orifice as a flat surface.
Further, the invention may comprise providing an improvement to self- cleaning spray nozzles by utilising a flat surface on one side of the orifice to remove problem of accurately locating the interacting surfaces which must align to create the spray producing orifice.

Claims

1. A spray nozzle having a spray orifice formed by meeting surfaces of at least first and second members, the meeting surfaces of the members being so shaped that the shape of the orifice formed by their meeting is substantially constant despite any misalignment of the members during their mutual approach.
2. A nozzle according to claim 1 wherein one or more of the members have a substantially even meeting surface.
3. A nozzle according to claim 1 or 2 wherein one or more of the meeting surfaces have a recess therein.
4. A nozzle according to any one of claims 1 to 3 wherein one or more of the meeting surfaces are substantially flat (planar).
5. A nozzle according to any one of claims 1 to 3 wherein one or more of the meeting surfaces are curved.
6. A nozzle according to claim 1 wherein one or more of the meeting surfaces are fabricated from two or more even surfaces.
7. A nozzle according to any one of the preceding claims wherein one or more of the meeting surfaces is shaped such that a self-centering action is provided as the surfaces meet.
8. A nozzle according to any one of the preceding claims wherein an orifice formed by the coming together of the meeting surfaces is provided substantially at an external surface of the spray nozzle.
9. A nozzle according to any one of the preceding claims wherein an orifice formed by the coming together of the meeting surfaces is provided at an internal region of the spray nozzle.
10. A nozzle according to any one of the preceding claims wherein the first and second contact members are arranged to temporarily come together and form the orifice.
11. A nozzle according to claim 10 wherein the nozzle is of the self- cleaning variety.
12. A nozzle according to any one of claims 1 to 9 wherein the first and second members of the spray nozzle are arranged to substantially remain in contact with one another.
13. A nozzle according to claim 12 wherein the first and second members are adhered to one another.
14. A method of forming a spray nozzle spray orifice comprising forming at least two members, and bringing the members together to meet, each member having a meeting surface shaped such that when they meet, the shape of the orifice is substantially unaffected by misalignment of the members as they are brought together.
15. A method according to claim 14 comprising shaping the members such that they align relative to one another as they are brought together to meet.
16. A method according to claim 14 or 15 comprising providing one of the members with an even meeting surface.
17. A method according to claim 16 comprising providing one or more of the members with a substantially flat (planar) meeting surface.
18. A method according to any one of claims 14 to 17 comprising providing a recess in one or more of the meeting surfaces of the members.
19. A method according to any one of claims 14 to 18 comprising adhering the first and second members to one another such that they are substantially permanently connected to one another.
20. A method according to any one of claims 14 to 18 comprising arranging the first and second members such that they are releasably connected to one another.
21. A method according to any one of claims 14 to 18 comprising temporarily bringing the first and second members together to temporarily form the orifice.
PCT/GB2000/004252 1999-11-05 2000-11-06 Spray technology improvement WO2001032317A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11619/01A AU1161901A (en) 1999-11-05 2000-11-06 Spray technology improvement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9926143.0 1999-11-05
GBGB9926143.0A GB9926143D0 (en) 1999-11-05 1999-11-05 Spray technology improvement

Publications (1)

Publication Number Publication Date
WO2001032317A1 true WO2001032317A1 (en) 2001-05-10

Family

ID=10863959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/004252 WO2001032317A1 (en) 1999-11-05 2000-11-06 Spray technology improvement

Country Status (3)

Country Link
AU (1) AU1161901A (en)
GB (1) GB9926143D0 (en)
WO (1) WO2001032317A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004001222A1 (en) * 2004-01-07 2006-03-30 Rational Ag Nozzle unit for cooking appliance has openings perpendicular to and parallel to axis of symmetry and each connected to chamber into which pipe opens eccentrically
WO2013010930A1 (en) * 2011-07-18 2013-01-24 Voith Patent Gmbh Self-cleaning nozzle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR984214A (en) * 1949-04-05 1951-07-03 Nozzle for spray watering lance and other spraying devices
FR2622814A1 (en) * 1987-11-05 1989-05-12 Collard Catherine Water spray (diffuser) characterised by the possibility of rapid cleaning without interruption of the water jet
US5472143A (en) * 1992-09-29 1995-12-05 Boehringer Ingelheim International Gmbh Atomising nozzle and filter and spray generation device
US5497946A (en) * 1992-12-05 1996-03-12 Incro Limited Self-cleaning/unblocking spray nozzle
US5743468A (en) * 1995-04-06 1998-04-28 Incro Limited Spraying apparatus and nozzle devices
US5803371A (en) * 1994-07-29 1998-09-08 Toyota Jidosha Kabushiki Kaisha Injection nozzle
US5803364A (en) * 1993-07-02 1998-09-08 Martin; Javier Axially separable self-cleaning nozzle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR984214A (en) * 1949-04-05 1951-07-03 Nozzle for spray watering lance and other spraying devices
FR2622814A1 (en) * 1987-11-05 1989-05-12 Collard Catherine Water spray (diffuser) characterised by the possibility of rapid cleaning without interruption of the water jet
US5472143A (en) * 1992-09-29 1995-12-05 Boehringer Ingelheim International Gmbh Atomising nozzle and filter and spray generation device
US5497946A (en) * 1992-12-05 1996-03-12 Incro Limited Self-cleaning/unblocking spray nozzle
US5803364A (en) * 1993-07-02 1998-09-08 Martin; Javier Axially separable self-cleaning nozzle
US5803371A (en) * 1994-07-29 1998-09-08 Toyota Jidosha Kabushiki Kaisha Injection nozzle
US5743468A (en) * 1995-04-06 1998-04-28 Incro Limited Spraying apparatus and nozzle devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004001222A1 (en) * 2004-01-07 2006-03-30 Rational Ag Nozzle unit for cooking appliance has openings perpendicular to and parallel to axis of symmetry and each connected to chamber into which pipe opens eccentrically
DE102004001222B4 (en) * 2004-01-07 2006-08-03 Rational Ag Nozzle unit for cooking appliance has openings perpendicular to and parallel to axis of symmetry and each connected to chamber into which pipe opens eccentrically
WO2013010930A1 (en) * 2011-07-18 2013-01-24 Voith Patent Gmbh Self-cleaning nozzle

Also Published As

Publication number Publication date
AU1161901A (en) 2001-05-14
GB9926143D0 (en) 2000-01-12

Similar Documents

Publication Publication Date Title
EP1513711B1 (en) Multiple spray devices for automotive and other applications
RU2350401C2 (en) Method of production of drop-like spray cone and device for its realisation
JP3579426B2 (en) Method for producing perforated discs
KR100478540B1 (en) Heaven Park Board Manufacturing Method
JP2532323Y2 (en) nozzle
US11801521B2 (en) Main body for a spray gun, spray guns, spray gun set, method for producing a main body for a spray gun and method for converting a spray gun
CA1209104A (en) Plural component dispensing device
US20040050970A1 (en) Swirl nozzle and method of making same
US20130186972A1 (en) Adjustable trajectory spray nozzles
SE510977C2 (en) Ways of producing jet diffusers
EP0904849A3 (en) Adhesive dispensing nozzles for producing partial spray patterns and method
EP0601822B1 (en) Spray nozzle with recessed deflector surface
WO2007014172A2 (en) Washer nozzle and system and method for making a washer nozzle
US20210346895A1 (en) Nozzle assembly for delivering an oscillating spray pattern
JP3790722B2 (en) Packaging and dispenser device
JPH02180658A (en) Nozzle accessory for adhesive spray gun
WO2001032317A1 (en) Spray technology improvement
DE2127964A1 (en) Valve actuation button for pressure packs
US4367847A (en) One-piece mechanical break up (MBU)
JP2017213541A (en) nozzle
DE60237931D1 (en) Perforated plate of a spray nozzle
CA2408384A1 (en) External mixing nozzle
EP2583807A1 (en) Metal mold positioning and fixing device
JP2544718Y2 (en) Spouting part of liquid spouting tool
WO2007052869A1 (en) Extension nozzle for molding plastics buffing thermal expansion

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase