US3567129A

US3567129A - Spraying devices

Info

Publication number: US3567129A
Authority: US
Inventors: Wesley David Martin
Original assignee: G G BENJAMIN AND CO Pty Ltd
Current assignee: G G BENJAMIN AND CO Pty Ltd
Priority date: 1969-06-23
Filing date: 1969-06-23
Publication date: 1971-03-02
Anticipated expiration: 1988-03-02

Abstract

This invention relates to a combined jet nozzle and control valve assembly for particular use in devices using fluid pressure for aspirating a liquid or powder from a container and directing it from the jet nozzle. By combining the jet nozzle and control valve in the manner of the invention a mechanically simpler and more easily operable device than previously known ones is obtained. The device of the invention comprises a jet nozzle and control valve assembly including a housing adapted to be detachably secured to a container and having an aperture for communication with the interior of said container, a passage through said housing having said aperture communicating therewith and adapted to be connected at one end to a source of fluid pressure, a jet nozzle located in the other end of said passage and having a fluid passage therethrough in communication with said source of fluid pressure, and a further passage in communication between said fluid passage and said aperture, a control valve located in a valve passage in said housing adjacent said one end of the first-named said passage, said control valve comprising a member slidable in said valve passage and having a hole formed therethrough for alternative movement into and out of coaxial register with and between said fluid passage and said source of fluid pressure and having a flat portion thereon engageable with a resilient sealing member on the adjacent end of said jet nozzle in all slidable positions of said control valve.

Description

United States Patent [72] Inventor Wesley David Martin New South Wales, Australia [21] Appl. No. 835,409 [22] Filed June 23, 1969 [45] Patented Mar. 2, 1971 [73] Assignee G. G. Benjamin & Company Pty, Limited New South Wales, Australia [54] SPRAYING DEVICES 10 Claims, 11 Drawing Figs. [52] US. Cl 239/318, 239/346, 239/369, 239/375, 25 l/325, 137/604 [51] Int. Cl B05b 7/30 [50] Field of Search 239/302, 310, 318, 337, 340, 346, 369, 375; 251/324, 325; 137/604; 222/402.16

[56] References Cited UNITED STATES PATENTS 3,034,731 5/1962 Chapin 239/318 Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Michael Y. Mar Att0meyWenderoth, Lind & Ponack ABSTRACT: This invention relates to a combined jet nozzle and control valve assembly for particular use in devices using fluid pressure for aspirating a liquid or powder from a container and directing it from the jet nozzle. By combining the jet nozzle and control valve in the manner of the invention a mechanically simpler and more easily operable device than previously known ones is obtained. The device of the invention comprises a jet nozzle and control valve assembly including a housing adapted to be detachably secured to a container and having an aperture for communication with the interior of said container, a passage through said housing having said aperture communicating therewith and adapted to be connected at one end to a source of fluid pressure, a jet nozzle located in the other end of said passage and having a fluid passage therethrough in communication with said source of fluid pressure, and a further passage in communication between said .fluid passage and said aperture, a control valve located in a valve passage in said housing adjacent said one end of the first-named said passage, said control valve comprising a member slidable in said valve passage and having a hole formed therethrough for alternative movement into and out of coaxial register with and between said fluid passage and said source of fluid pressure and having a flat portion thereon engageable with a resilient sealing member on the adjacent end of said jet nozzle in all slidable positions of said control valve.

PATENTED MAR 2 I97! SHEET 1 OF 2 WESLEY DAVID MARTIN,Inventor Attorneys H z I WESLEY DAVID MARTIN Invent FIGJO 62 LMMMXMLMWM/L SPRAYING DEVICES This invention relates to improvements in spraying devices and in particular to devices using fluid pressure for aspirating a liquid or powder from a container and directing it in the form of a jet or spray to a desired place or area.

Whilst not confined to such a limited use, such devices are suitable for directing insecticidal liquids on vegetation, in which case the fluid pressure can be supplied by connecting the device to a hose coupled to a mains watersupply. When used for aspirating a powder, it may be similarly connected so that the powder is mixed with the water and directed as a suspension or it may be connected to a gas or air supply so that the powder is directed as such. The device, when connected to a gas or air supply may also be used for spraying paint or oil. It will be obvious from the above that the device has many and varied applications, and the scope of the invention is accordingly not intended to be limited to any specific purpose to which it may be applied.

Devices of a generally similar nature are already known, but suffer from various disadvantages; largely due to difficulties in controlling the ejection of material from the device and in preventing leakages, particularly around the control valve and jet.

One object of the present invention is to provide in such devices a jet and control valve assembly whereby the above disadvantage is eliminated.

A further object is to provide a spraying device including the above jet and control valve assembly.

there is provided in a spraying device, a jet nozzle and control valve assembly including ahousing adapted to be detachably secured to a container and having an aperture for communication with the interior of said container, a passage through said housing having said aperture communicating therewith and adapted to be connected at one end to a source of fluid pressure, a jet nozzle located in the other end of said passage and having a fluid passage therethrough in communication with said source of fluid pressure, and a further passage in communication between said fluid passage and said aperture, a control valve located in a valve 'passage in said housing adjacent said one end of the first-named said passage, said control valve comprising a member slidable in said valve passage and having a hole formed therethrough for alternative movement into and out of coaxial register with and between said fluid passage and said source of fluid pressure and having a flat portion thereon engageable with a resilient sealing member on the adjacent end of said jet nozzle in all slidable positions of said control valve.

According to a further general form of the invention there is provided a spraying device including a jet nozzle andcontrol valve assembly as hereinabove defined, a container detachably secured to said housing, a flexible tubesurrounding said aperture and depending within said container to a point adjacent the base thereof, a handle secured toand projecting from said housing and means for supplying fluid pressure to said one end of said passage through said housing.

A better understanding of the invention may, however, be obtained from the following description of one exemplary form thereof, it being appreciated, however, that this descrip' tion isexemplary only, and that the full scope of the invention is not intended to be limited by any specific terms necessarily used for the purpose of this description.

By way of explanation, it is to be understood that terms of orientation such as upper, lower," horizontal," vertical and so on refer'to the aspect of the various integers when the jet and control valve assembly issecuredto a container which is standing on its base on a horizontal surface. Similarly, the "front of the device is that side from which.the jet or spray is ejected.

One exemplary embodiment of the invention is illustrated in the accompanying drawings, of which:

FIG. v1 is an exploded view, partly in vertical section of the spraying device;

According to one general form of the invention, therefore,

FIG. 2 is a section on the line 2-2 of FIG. 1;

FIG. 3 is an axial section of the jet nozzle;

FIG. 4 is a longitudinal elevation of the jet nozzle of FIG. 3;

FIG. 5 is a side elevation, partly in axial section, of the control valve;

FIG. 6 is a cross section on the line 6-6 of FIG. 5;

FIGS. 7 and 8 are respectively a top plan view and an elevation of the deflector plate, FIG. 8 being taken on the arrow 8 of FIG. 7;

FIG. 9 is a plan view of the nonretum valve; and

FIGS. 10 and 11 are, respectively, an axial section and an endelevation of the pipe socket for the nonretum valve and the valve of FIG. 9, FIG. 11 being taken on the arrow 11 of FIG. 10.

Referring now to the drawings, a container 10 for the present device comprises a substantially frustoconical bottle.having.a closed base 12 and an open upper portion 14 in the form of a cylindrical neck 16 upon the upper end of which is formed rathermore than one turn or helix of coarse thread 18 such as conventional bottle thread. The container 10 may be made of metal such as aluminum, in which case the thread 18 will be formed by rolling in the known manner. Preferably, however, the container 10 is formed from a semitransparent or transparent plastics material such as polypropylene in which case the thread 18 is formed as the container 10 is being molded. Such a plastics material is preferred, as it enables the .user to observe the amount of material available within the container 10 without the need to remove it from the housing 20.

As will be seen hereunder, material from the container 10 is drawn by aspiration from a tube 22 depending into the container and to ensure that the maximum amount of material may be so withdrawn, the center of its base 12 is upwardly recessed to leave an annular peripheral well 24 around the base 12, into which well 24 the tube 22 depends.

The upper threaded portion 18 of the container 10 is engageable with a mating thread 26 formed in the jet nozzle and control valve housing 20 now to be described.

This housing 20 consists of a lower annular member 28 interiorly of which the mating thread 26 is formed. Above the threaded portion 26, the interior of the housing is domed as at 30 in substantially conical form and centrally of the dome 30 is formedan aspirating aperture 32 which leads into a jet nozzle passage 34 formed horizontally into an upward projection 36 of the body of the housing'20 from the front of the housing. For the, greater part of its .depth from the front of the housing 20 the jet nozzle passage 34 is of sufficient diameter to hold the body portion of a jet nozzle, later to be described, butat its rear end the jet nozzle passage 34 is considerably reduced in diameter to form a reduced diameter passage 38 which leads into a chamber 40 which is connected through suitable hose fittings 42, 44 to a flexible hose (not shown) which is connected to a'source of fluid pressure, which latter may be a mains pressure water supply or a supply of compressed air.

The chamber 40 is counterbored to two diameters, the largest diameter section '46 at the outer end of the chamber 40 being internally threaded to take a screw-in nonreturn valve hose fitting 48 and the smaller diameter portion 50, at the inner end of the chamber 40, having a smooth bore and being connectedto the jet nozzle passage 34 through the reduced diameter passage 38. A nonreturn valve 52, preferably of the flap-type, is located-in the chamber-40 to rest on the annular ledge54-formed by the junction of the'counterbores 46 and --As shown particularly in FIGS.9 to 11, the nonretum valve 52-is a rubber or flexible plastics disc having a cruciform incision-'56 formed through its center. The disc abuts against the passages 66 which are normally obstructed by the nonreturn valve disc 52 radially outwardly of the cruciform incision 56. This is best shown in FIG. 11 when associated with FIG. 10. The hose fittings 42, 44, with a sealing washer 68 are secured in the normal way to the fitting 48 by engaging the thread 70 on the nipple 44 with the internal thread 60 of the fitting 48 so that, in the normal manner for such hose couplings, the ring nut 42 can be rotated to screw it on to a normal hose-end fitting (not shown).

The cruciform incision 56 allows fluid under pressure to pass from the fitting 48 to the chamber 40 by flexing the nonreturn valve 52 away from the wall 72 and opening the incision 56. With any reversal of pressure, the flaps formed by the cruciform incision 56 close against the wall 72 and thus prevent any reverse flow of fluid.

Formed at right angles to the jet nozzle passage 34 at its inner end and merging with the adjacent end of the reduced diameter portion 38 of the passage, is a horizontal control valve passage 74 which is open at each end through the body 36 of the housing 20, and in this control valve passage 74 is slidable a generally cylindrical control valve 76 which is longer than the control valve passage 74 so that when slid in the said passage one or other of its ends will project outwardly of the housing body 36.

Approximately midway of its length and extending for some distance on each side of its axial center the control valve 76 has a flattened portion 78 formed on a chord thereof and formed diametrically through the valve 76 so that it emerges through the radial center of the flattened portion 78 in a flow passage 80 of the same diameter as the reduced portion 38 of the jet nozzle passage 34. The flow passage 80 is axially offset to one side of the axial center of the flattened portion 78 in such a manner that when the control valve 76 is moved axially in one direction the flow passage 80 is aligned with the reduced portion 38 of the jet nozzle passage 34 to provide a fluid flow path therethrough, whilst upon movement in the other direction, the passages 34 and 80 are brought out of alignment and the fluid flow is interrupted.

To prevent external leakage past the ends of the control valve 76 and also the provide a resistance to movement of the control valve 76 so that it cannot accidentally be moved or dislodged, it is provided with a peripheral groove 82 (see FIG. at each axial side of the flattened portion 78 and in each groove is located a resilient rubber or plastics O-ring 84.

The flattened portion 78 faces the larger diameter portion of the jet nozzle passage 34 and its flat surface lies normal to the axis of the jet nozzle passage 34. It may be held in this position by the end of a peg engaging in an axial recess (not shown) formed in the periphery of the control valve 76. This is not essential, however, as described hereunder.

The jet nozzle 86 itself is a tight press fit in the jet nozzle passage 34 and consists of a cylindrical member ,which is pressed firmly into the jet nozzle passage 34 from the front thereof until a resilient rubber or plastics O-ring 88 secured in an annular groove 90 at its inner end rests in sealing engagement on the flat portion 78 of the control valve 76.

The jet nozzle 86 is cylindrical throughout its length but at its outer end has an enlarged annular rim 90, which may be peripherally knurled, although this is-not essential.

At a position thereon which, when the jet nozzle 86 is fully pressed into the jet nozzle passage 34, will coincide with the aspirating aperture 32 in the dome of the housing 20, an annular groove 92 is formed in the periphery of the jet nozzle 86 and formed diametrically through this groove 92 is an aspirating passage 94 of the same diameter as the aspirating aperture 32. On each side of this groove 92 is formed a further annular groove 96 and in each of these further grooves 96 is located a resilient rubber or plastics Oring. The O-rings 98 are of such size as to hold the jet nozzle 86 firmly in the jet nozzle passage 34.

Formed coaxially through the jet nozzle 86 is a counterbored spraying (or jetting) bore 100 of two

different diameters

102, 104 which join at the position of the aspirating passage 94. The smaller diameter portion 104 of the bore 100 is of the same diameter as the flow passage through the control valve 76, with which it is aligned in the flow position of the valve. The other, or front, end 102 of the bore is of slightly greater diameter and the change in diameter acts similarly to a venturi when pressure fluid is passed therethrough.

With the above parts in position and a suitable liquid or powder in the container 10, if pressure fluid is directed through the jet nozzle 86 by movementof the control valve 76, there will be a drop in pressure at the junction of the smaller and

larger diameter portions

104, 102 of the jet nozzle bore 100 and this will cause powder or liquid to be aspirated through the tube 22 in the container 10 and to be ejected from the jet nozzle 86,,mixed with the pressure fluid, substantially in the form of a stream or jet.

Such a stream is, in some instances, what is required. In other instances, however, a spray may be needed and means may be provided whereby, at will, the stream may readily be converted to a spray which, itself, may also be adjusted.

For this purpose an adjustable deflector 106 is pivoted to the housing 20 at 108 (FIG. 1) slightly below and in front of the point of emission from the jet nozzle 86.

This deflector 106 consists of a circular flat plate 110 from which a portion has been removed on a chord thereof as at 112. This plate 110 is secured to two angle brackets 114 which are separated to leave a space 116 therebetween. At the angle of these brackets 114, they are pivoted at 108 to the housing body 20 on each side of and below the jet nozzle 86 so that the circular portion of the plate 110-projects in front of, but clear of, the jet nozzle 86. The arms 118 of the two angle brackets 114 extend upwardly, one on each side of the jet nozzle 86 an are connected together at their upper ends by a crossbar 120 which is horizontally stepped or otherwise roughened as at 122 to form a finger plate 124.

If it is desired to change the stream issuing from the jet nozzle 86 into a spray, the finger plate 124 is moved backwards so that the deflector plate 110 is tilted into the path of the stream which, upon striking the deflector plate 110, is transformed into a spray, the intensity and angle of spread of which will vary with the angle of the deflector plate 110 relative to the stream as it leaves the jet nozzle 86.

To the body 20, preferably opposite the jet nozzle 86, is secured an operating handle 126, which may conveniently be of the pistol-grip type.

Whilst the invention is not intended to be limited by any specific material used in its construction, it may be found convenient to manufacture all parts except the jet nozzle 86 hose attachments and pivots or screws from a plastics material such as P.V.C. of polypropylene. This is not essential, however, and any substitution of materials is considered to lie within the scope of the invention.

lclaim:

1. in a spraying device, a jet nozzle and control valve assembly including a housing adapted to be detachably secured to a container and having an aperture for communication with the interior of said container, a passage through said housing having said aperture communicating therewith and adapted to be connected at one end to a source of fluid pressure, a jet nozzle located in the other end ,of said passage and having a fluid passage therethrough in communication with said source of fluid pressure, and a further passage in communication between said fluid passage and said aperture, a control valve located in a valve passage in said housing adjacent said one end of the first-named said passage, said control valve comprising a member slidable in said valve passage and having a hold formed therethrough for alternative movement into and out of coaxial register with and between said fluid passage and said source of fluid pressure and having a flat portion thereon engageable with a resilient sealing member on the adjacent end of said jet nozzle in all slidable positions of said control valve.

2. An assembly accordingto claim J1, wherein the fluid passage through said jet nozzle is of two different diameters with the largest said diameter located at the end of the fluid passage remote from said source of fluid pressure and said aperture is in communication with said fluid passage through said fluid passage through said further passage at the junction of said two different diameters of said fluid passage, whereby said fluid passage is adapted to function as an aspirating ventur1.

3. An assembly according to claim 1, wherein said jet nozzle is cylindrical and includes a peripheral groove in the base of which said further passage is formed diametrically through said jet nozzle.

4. An assembly according to claim 2, wherein said jet nozzle is a press fit in said other end of said passage through said housing and is secured therein by peripheral resilient sealing rmgs.

5. An assembly according to claim 4, wherein said resilient sealing rings are two peripheral O-rings located one in each of two further peripheral grooves located one at each opposite axial side of the first-named said peripheral groove.

6. An assembly according to claim 2, wherein said control valve is cylindrical in form and said flat portion is formed by removing an axial portion of the periphery of said cylindrical control valve on a chord of said periphery.

7. An assembly according to claim ll, wherein said control valve is held in fluidtight slidable engagement within said valve passage by axially spaced resilient sealing rings.

8. An assembly according to claim 7, wherein said resilient sealing rings are two O-rings located one in each of two peripheral grooves in said control valve, one said groove and O-ring being located axially outwards of said flat portion on opposite axial sides thereof.

9. An assembly according to claim 1, wherein the resilient sealing member engageable with the flat portion of said control valve is a resilient O-ring located in an annular grooveformed in said adjacent end of said jet nozzle.

ll). A spraying device including a jet nozzle and control valve assembly as claimed in claim 1, a container detachably secured to said housing, a tube surrounding said aperture and depending within said container to a point adjacent the base thereof, a handle secured to and projecting from said housing and means for supplying fluid pressure to said one end of said passage through said housing.

Claims

1. In a spraying device, a jet nozzle and control valve assembly including a housing adapted to be detachably secured to a container and having an aperture for communication with the interior of said container, a passage through said housing having said aperture communicating therewith and adapted to be connected at one end to a source of fluid pressure, a jet nozzle located in the other end of said passage and having a fluid passage therethrough in communication with said source of fluid pressure, and a further passage in communication between said fluid passage and said aperture, a control valve located in a valve passage in said housing adjacent said one end of the first-named said passage, said control valve comprising a member slidable in said valve passage and having a hold formed therethrough for alternative movement into and out of coaxial register with and between said fluid passage and said source of fluid pressure and having a flat portion thereon engageable with a resilient sealing member on the adjacent end of said jet nozzle in all slidable positions of said control valve.

2. An assembly according to claim 1, wherein the fluid passage through said jet nozzle is of two different diameters with the largest said diameter located at the end of the fluid passage remote from said source of fluid pressure and said aperture is in communication with said fluid passage through said fluid passage through said further passage at the junction of said two different diameters of said fluid passage, whereby said fluid passage is adapted to function as an aspirating venturi.

4. An assembly according to claim 2, wherein said jet nozzle is a press fit in said other end of said passage through said housing and is secured therein by peripheral resilient sealing rings.

7. An assembly according to claim 1, wherein said control valve is held in fluidtight slidable engagement within said valve passage by axially spaced resilient sealing rings.

9. An assembly according to claim 1, wherein the resilient sealing member engageable with the flat portion of said control valve is a resilient O-ring located in an annular groove formed in said adjacent end of said jet nozzle.

10. A spraying device including a jet nozzle and control valve assembly as claimed in claim 1, a container detachably secured to said housing, a tube surrounding said aperture and depending within said container to a point adjacent the base thereof, a handle secured to and projecting from said housing and means for supplying fluid pressure to said one end of said passage through said housing.