WO1999039835A1 - Pulverisateur a aspiration - Google Patents

Pulverisateur a aspiration Download PDF

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Publication number
WO1999039835A1
WO1999039835A1 PCT/US1998/001576 US9801576W WO9939835A1 WO 1999039835 A1 WO1999039835 A1 WO 1999039835A1 US 9801576 W US9801576 W US 9801576W WO 9939835 A1 WO9939835 A1 WO 9939835A1
Authority
WO
WIPO (PCT)
Prior art keywords
bleed
carrier
channel
chemical
sprayer
Prior art date
Application number
PCT/US1998/001576
Other languages
English (en)
Inventor
Donald J. Shanklin
Ronald F. Englhard
Stephen B. Leonard
Kenneth H. Kloet
Original Assignee
S.C. Johnson & Son, Inc.
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 S.C. Johnson & Son, Inc. filed Critical S.C. Johnson & Son, Inc.
Priority to PCT/US1998/001576 priority Critical patent/WO1999039835A1/fr
Priority to CA002319366A priority patent/CA2319366C/fr
Priority to US09/601,302 priority patent/US6345773B1/en
Publication of WO1999039835A1 publication Critical patent/WO1999039835A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2424—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together downstream of the container before discharge

Definitions

  • the present invention relates generally to sprayers and more particularly to aspiration-type sprayers for dispensing chemicals in a carrier fluid.
  • Aspiration-type sprayers are commonly used to dispense liquid-based chemicals, such as washing detergents, fertilizers, or pesticides.
  • the chemical which is generally provided in a container in concentrated form, is diluted and propelled by a carrier fluid.
  • the carrier fluid is water
  • the sprayer is coupled to a garden hose. Water from the hose enters the sprayer through an inlet and flows through an expansion or mixing chamber and out through an outlet.
  • the expansion chamber is configured so that the flow of water creates a pressure drop (venturi effect), which draws the chemical from the container into the expansion chamber, where it mixes with the stream of water.
  • the amount of chemical drawn into the stream of water varies with the amount of pressure drop generated within the expansion chamber and by the size of the passage into the expansion chamber through which the chemical is drawn.
  • the sprayer of the '265 patent provides for two modes of operation— “on” (wherein the valve is positioned to open the carrier fluid passageway and the chemical aspiration passageway) and “off (wherein the valve is positioned to close the carrier fluid passageway and the chemical aspiration passageway).
  • This arrangement is quite suitable for spraying chemicals.
  • U.S. Patent No. 5,007,588, issued to Chow et al., for an "Aspiration-Type Sprayer” shows another sprayer, which includes a nozzle that directs water to flow over an aspiration opening at the top of a passageway through which the contents of a connected container can be drawn.
  • a bleed passage extends from the passageway below the aspiration opening. Opening and closing the bleed passage, as by the operator putting his finger thereover, permits the contents of the container to be selectively drawn through the passageway by the suction created by the flow of water over the aspiration opening.
  • Restricted Orifice and Expansion Chamber Construction discloses another sprayer, which includes a valve mechanism for varying the amount of chemical drawn into a water stream.
  • a passage is formed in an upper portion of the sprayer, connecting a mixing chamber with ambient environment.
  • the passage is selectively restricted by a disk having a plurality of different-sized openings. The disk can be rotated to allow varying amounts of air to pass through the passage and into the mixing chamber, thereby varying the amount of chemical that is drawn into the water stream.
  • the sprayer disclosed in the Gilmour patent permits a variable aspiration rate, a separate valve is required to control the flow of water through the sprayer, thus complicating the manufacture and operation of the sprayer.
  • Another method of varying the aspiration rate is disclosed in U.S. Patent No.
  • the present invention addresses the foregoing needs in the art by providing an aspiration type sprayer in which a bleed line, extending from a chemical supply tube, and a carrier channel can both be controlled by a single control valve.
  • the sprayer head includes (i) a carrier channel having an inlet for receiving a pressurized carrier fluid, an outlet through which the carrier fluid exits, and an expansion chamber in between the inlet and outlet, (ii) a chemical supply channel in flow communication with the expansion chamber of the carrier channel through an aspiration opening, so that a flow of carrier fluid through the carrier channel produces an aspiration flow from the chemical supply channel into the expansion chamber through the aspiration opening, the chemical supply channel having a free end for submersion in the liquid chemical, and (iii) a bleed line extending from the chemical supply channel between the aspiration opening and the liquid chemical, the bleed line connecting the chemical supply channel in flow communication to ambient air.
  • the control valve assembly is seated in the sprayer head to simultaneously engage the carrier channel and the bleed line, the control valve assembly being movable relative to the sprayer head to (i) selectively open and close the carrier channel to selectively permit the carrier fluid to flow therethrough, and (ii) with the carrier channel open, selectively open and close the bleed line to selectively permit ambient air to be drawn into the chemical supply channel in response to the aspiration flow produced by the flow of carrier fluid.
  • the bleed line is dimensioned so that, when pressurized carrier fluid is supplied to the inlet and the control valve assembly is positioned to open both the carrier channel and the bleed line, sufficient ambient air is drawn through the bleed line into the chemical supply channel so that no liquid chemical is drawn by the aspiration flow into the expansion chamber.
  • the bleed line is dimensioned so that, when pressurized carrier fluid is supplied to the inlet and the control valve assembly is positioned to open both the carrier channel and the bleed line, ambient air is drawn through the bleed line into the chemical supply channel at a flow rate sufficient to partially counterbalance the aspiration flow, so that liquid chemical is drawn into the expansion chamber in smaller proportions than when carrier fluid is supplied to the inlet and the control valve is positioned to open the carrier channel and close the bleed line.
  • the liquid chemical comprises two batches of liquid chemical
  • the chemical supply channel comprises (i) a first chemical passage in flow communication with the expansion chamber and having a free end for submersion in one of the batches of liquid chemical and (ii) a second chemical passage in flow communication with the expansion chamber and having a free end for submersion in the other of the batches of liquid chemical
  • the bleed line comprises a first bleed passage and a second bleed passage, each of the bleed passages connecting a corresponding one of the chemical passages in flow communication with ambient air
  • the control valve assembly with the carrier channel open, selectively opens and closes each of the bleed passages.
  • Figure 1 is an elevational cross section of an aspiration-type sprayer according to an embodiment of the present invention.
  • Figure 2 A is an elevational view of a control valve of the sprayer illustrated in Figure 1.
  • Figure 2B is an elevational view of the control valve shown in Figure 2 A, rotated 90°.
  • Figure 2C is a cross section taken along the line C-C in Figure 2A.
  • Figure 2D is a cross section taken along the line D-D in Figure 2B.
  • Figure 3 is a schematic of a sprayer according to another embodiment of the present invention.
  • Figure 4A is a schematic of a sprayer according to yet another embodiment of the present invention.
  • Figure 4B is a perspective view of an insert of the sprayer illustrated in Figure 4A.
  • Figure 5 A is an elevational cross section of a sprayer according to a further embodiment of the present invention.
  • Figure 5B is a perspective view of a control valve of the sprayer illustrated in Figure 5A.
  • FIGS 1 and 2A-2D show a preferred embodiment of an aspiration-type sprayer 1 of the present invention, two major components of which are a sprayer head 10 and a control valve 20.
  • the sprayer head 10 is connectable to both a chemical source and a carrier fluid source.
  • the chemical source will be a container C -6-
  • the carrier fluid source will be a water hose.
  • this embodiment of the aspiration-type sprayer 1 will often be described for use in a washing application in which the carrier fluid is water and the chemical is liquid detergent or surfactant.
  • the sprayer could easily be adapted for use with other carrier fluids and chemicals.
  • the sprayer head 10 includes a carrier inlet 12 and outlet 14. Between the inlet 12 and outlet 14 is a carrier channel 30 which includes an expansion chamber 32.
  • a chemical supply channel 50 depends from the expansion chamber 32, and has a free end for submersion in the chemical.
  • a bleed line 60 extends from the chemical supply channel 50.
  • a bore 80 intersects both the carrier channel 30 and the bleed line 60.
  • the control valve 20 sits in the bore 80 of the sprayer head 10. The valve 20 is moveable to selectively open and close the carrier channel 30 and the bleed line 60.
  • a vent 70 exposes the mouth of the container C to the outside of the sprayer head 10.
  • the sprayer head 10 is preferably formed of a polypropylene copolymer. This material is chosen because, compared to other plastics such as polypropylene homopolymer, polypropylene copolymer is soft and pliable, facilitating assembly of the sprayer. However, almost any plastic, such as polyethylene, acetal, or the like, would be suitable for these purposes.
  • the carrier channel 30 includes an input chamber 31 at the inlet 12.
  • a conventional threaded hose nut 19, with the accompanying hardware, is snap fit onto the end of the sprayer head 10 for coupling with a water hose H.
  • the input chamber is tapered downstream and feeds into an upstream carrier passage 34.
  • the upstream carrier passage 34 empties into the upstream side of the bore 80, which is generally cylindrical in shape.
  • the downstream carrier passage 38 in turn empties into the expansion chamber 32.
  • At the downstream end of the expansion chamber 32 is the outlet 14 to the sprayer head 10. Press fit through the outlet into the expansion chamber 32 is conventional sprayer metering jet hardware. Many commercially available metering jets can be used, and those skilled in the art will recognize that the hardware selected will aid in controlling the spray pattern and aspiration rate of the sprayer 1.
  • the metering jet hardware includes a metering jet insert 40 and a metering jet cartridge 42.
  • the insert 40 and cartridge 42 are separately molded and fit together to facilitate production.
  • the insert and cartridge are dimensioned to fit snugly within the expansion chamber 32, with the insert 40 upstream of the cartridge 42.
  • the downstream carrier passage 38 empties into the metering jet insert 40, which has a cylindrical bore 44 therethrough with a flared upstream end, and an approximately 2.6mm diameter.
  • the downstream end of the generally cylindrical outer surface of the insert 40 is tapered and rounded.
  • the metering jet cartridge 42 has a mouth dimensioned to receive the downstream end of the jet insert 40.
  • the insert 40 empties into a cylindrical chamber 46 in the upstream end of the cartridge 42.
  • This chamber 46 has a diameter of approximately 5.6mm.
  • the chamber 46 steps down in diameter and then tapers at its downstream end into a cylindrical passage 48 having a diameter of approximately 3.0mm.
  • an aspiration opening 49 approximately 0.5mm in diameter, extends down through the wall of the metering jet cartridge 42.
  • the aspiration opening 49 is formed through the base of a depression in the outer surface of the cartridge 42.
  • the chemical supply channel 50 depends from the expansion chamber 32.
  • a neck 54 At the upper end of the chemical supply channel 50 is a neck 54, at the top of which is an opening 56 into the expansion chamber 32. This opening 56 is considerably larger than and mates with the aspiration opening 49 in the metering jet.
  • a dip tube 52 for submersion in the chemical.
  • the neck 54 is integrally molded with the sprayer head 10, and the dip tube 52 is separately formed and press fit into the neck 54.
  • a vent 70 through the skirt 16 permits ambient air into the container, avoiding the creation of a vacuum in the chamber, which would undermine the aspiration process.
  • This vent 70 could alternately be provided as an integral feature of the container.
  • the bleed line 60 which will be discussed in more detail below, extends between the chemical supply channel 50 and the bore 80.
  • An inlet 62 to the bleed line 60 is aligned longitudinally on the wall of the bore 80 with the inlet 36 to the downstream carrier passage 38.
  • the control valve 20 of the illustrated embodiment is also preferably formed of a polypropylene copolymer, but could be formed of any of the alternate materials discussed above in connection with the sprayer head 10.
  • the control valve 20 has a generally cylindrical overall shape and is longitudinally segregated by a pair of O-rings 23a, 23b, which are seated in circumferential grooves on the outer surface of the control valve 20.
  • the O-rings are preferably formed of rubber or the like to provide a tight seal against the inside of the bore 80.
  • the control valve 20 can rotate freely on its longitudinal axis within a range of motion determined by the circumferential length of a groove 83 at the base of the top peripheral seat 81.
  • a projection 25 on the underside of the top flange 21 sits in the groove 83 and prevents the valve 20 from rotating beyond its bounds.
  • the valve 20 can be configured to move differently.
  • the valve 20 can be configured to rotate on an axis more or less parallel to the flow of carrier fluid, as opposed to rotating generally perpendicular, or to slide longitudinally rather than rotate within the bore 80. Any of a number of conventional valve motion limiters can be used as well.
  • the carrier control section 26 is sealed between the O-rings 23a, 23b.
  • a carrier duct 27 passes completely through the carrier control section 26.
  • the stopper pad 29a sits in a depression and, when the control valve 20 is in the bore 80, fits tightly against the inside of the bore 80.
  • the stopper pad is preferably formed of a suitable silicon, rubber or plastic which will deform slightly when compressed in the bore to provide a - 9 -
  • Thermoplastic elastomers such as KratonTM TPE, available from Shell Oil Company of Houston, Texas, have proven to be suitable.
  • the stopper pad should have an arcuate outer surface to facilitate a tight fit with the inside of the bore.
  • a boss 24a at the bottom of the depression mates with a receiving hole on the underside of the stopper pad 29a, preventing the stopper pad 29a from sliding circumferentially with respect to the control valve 20.
  • the control valve 20 is rotated to selectively position either the carrier duct 27 or the stopper pad 29a in the path of the carrier channel 30.
  • the control valve 20 is positioned so that the carrier duct 27 of the carrier control section 26 is aligned with the upstream and downstream carrier passages 34, 38 of the sprayer head 10, carrier fluid can flow freely through the carrier channel 30.
  • the control valve 20 is positioned so that the stopper pad 29a of the carrier control section 26 is aligned with the inlet 36 to the downstream carrier passage 38, the flow of carrier fluid is blocked.
  • the bleed control section 28 of the control valve 20 includes a pair of stopper pads 29b, 29c, which, like the stopper pad 29a of the carrier control section 26, are situated in depressions on the surface of the control valve.
  • stopper pads 29b, 29c also fit tightly against the inside of the bore 80 when the control valve 20 is in the bore.
  • a boss 24b, 24c, respectively, at the bottom of each depression mates with a receiving hole on the underside of each stopper pad 29b, 29c to prevent circumferential slippage.
  • the stopper pads 29b, 29c of the bleed control section 28 are circumferentially spaced, with a gap 64 separating them.
  • control valve 20 has an approximately 90° range of rotation, representing three operational settings.
  • the stopper pad 29a of the carrier control section 26 and one of the stopper pads 29b of the bleed control section 28 are aligned longitudinally on the control valve 20, so as to be simultaneously engageable (in the first operational setting) with the inlets 36, 62 to the downstream carrier passage 38 and the bleed line 60, respectively.
  • the mouth of the carrier duct 27 is elongated so that both the other stopper pad 29c and the gap 64 between the stopper pads 29b, 29c of the bleed control section 28 are longitudinally in line with part of the mouth of carrier duct 27.
  • either the other stopper pad 29c or the gap 64 can be aligned with the bleed line 60 when the carrier duct 27 is aligned with the carrier channel 30.
  • the carrier duct 27 is aligned with the carrier channel 30, and the gap 64 is aligned with bleed line inlet 62.
  • the carrier duct remains aligned with the carrier channel, but the other stopper pad 29c of the bleed control section is aligned with the bleed line inlet 62. Therefore, the three operational settings are: (i) carrier channel 30 and bleed line 60 closed, (ii) carrier channel 30 and bleed line 60 open, and (iii) carrier channel 30 open and bleed line 60 closed.
  • the bleed line 60 of the embodiment shown in Figure 1 is tubular and approximately 2.6mm in diameter. This is more than sufficiently large to permit enough air to flow therethrough to counteract the aspiration flow through the aspiration opening 49, when the bleed line 60 is open. That is, rather than drawing the chemical from the container through the dip tube 52, the aspiration flow caused by the pressure drop in the expansion chamber 32 will simply cause ambient air to flow into the neck 54 of the chemical supply channel 50 through the bleed line 60. Because sufficient air can pass through the bleed line 60, the pressure at the top of the chemical supply channel 50 will remain essentially equal to the pressure on the top of the chemical in the container, and no chemical will flow through the chemical supply channel 50.
  • any water that enters the sprayer head 10 at the inlet 12 will exit the sprayer head 10 at the outlet 14 without drawing any chemical with it.
  • the size of the bleed line 60 it is possible to vary the above-noted affect.
  • the size of the bleed line 60 is reduced sufficiently, the flow of ambient air into the chemical supply channel 50 through the bleed line 60 can only partially compensate for the aspiration flow through the aspiration opening 49 due to the carrier flow through the expansion chamber 32.
  • chemical will be drawn through the dip tube 52.
  • the diameter of the bleed line 60 is reduced to approximately 0.5- 1.0mm at an integrally-molded constriction 66.
  • the illustrated constriction 66 is achieved by integrally molding a taper proximate the chemical supply channel 50, which narrows as the bleed line 60 approaches chemical supply channel 50. This is done to facilitate molding.
  • the constriction can be located anywhere along the bleed line 60, and can be formed by tapering the bleed line 60 in the opposite direction or by any other shape. In fact, the bleed line 60 can have a uniform, small cross section.
  • the sprayer can be configured so that a select, reduced amount of the chemical is drawn into the expansion chamber 32 for mixing with the carrier when the bleed line 60 is open.
  • the expansion chamber 32, including the metering jet, of a hose end sprayer of an embodiment of the present invention can be selected to achieve a desired ratio of water to soap on the order of about 40: 1 to about 80:1, when the bleed line 60 is closed.
  • a constricted bleed line 60 can be used to create a "pre-wash” or “rinse” mode in which trace amounts of soap (for example, on the order of 1 part soap to approximately 300-600 parts water) are drawn into the flow of water, when the bleed line 60 is open.
  • trace amounts of soap for example, on the order of 1 part soap to approximately 300-600 parts water
  • the variations in the soap/air mixture (when the constricted bleed line 60 is open) will compound the variations in soap concentration that occur when the bleed WO 99/39835 _ ⁇ 2 _ PCT/US98/01576
  • a separately molded insert 58 can be provided to create the desired reduction in size of the bleed line 60, as shown in Figures 4 A and 4B. This separately molded insert fits into the neck 54 of the chemical supply channel
  • the insert 58 is hollow, with an open top and bottom, and is shaped to closely match the inside of the neck 54 of the chemical supply channel 50.
  • a tapered hole 59 mates with the opening of the bleed line 60 to effectively constrict the opening of the bleed line 60.
  • the insert 58 can be formed of polypropylene, acetal, polyethylene or any other suitable material. Once the insert 58 is fabricated, it can simply be press fit into the neck 54 of the chemical supply channel 50. The use of a separate insert 58 facilitates production, as compared to producing an integrally-molded bleed line 60 of such small dimensions. Using an insert, rather than attempting to produce a bleed line 60 of sufficiently small size, also allows more precise manufacturing, resulting in better control of mixing rates. Inserts can be produced with varying sizes of hole 59, increasing the flexibility to produce varying chemical/water ratios with the same design of sprayer head 10.
  • a similar effect can be achieved by reducing the size of the gap 64 between the stopper pads 29b, 29c in the bleed control section 28 of the valve 20. If the pads 29b, 29c are placed closely together, they will partially obstruct the inlet 62 to the bleed line 60 when the gap 64 between the pads 29b, 29c is aligned with the inlet 62.
  • the bleed control section 28 of the valve 20 could be provided with three stopper pads, rather than two, circumferentially arranged so that two differently sized gaps between these pads are aligned with the carrier duct 27.
  • a large gap such as that shown in the embodiment illustrated in Figures 2A and 2B, can be provided between two of the stopper pads. When this large gap is aligned with the -13-
  • the inlet to the bleed line 60 sufficient air can flow through the bleed line 60 so that no chemical is drawn through the chemical supply channel 50.
  • the other gap can be smaller so that, when aligned with the inlet to the bleed line 60, it would still partially close the bleed line 60, resulting in trace amounts of chemical being drawn into the carrier flow in the manner discussed above.
  • the sprayer head 10 can be provided with a pair of chemical supply channels 150a, 150b depending from the expansion chamber 32 for submersion into separate chemical containing chambers.
  • One of the chemical supply channels 150b is not visible in this view because it is hidden behind the other.
  • Two bleed lines 160a, 160b can be provided, one leading from each of the chemical supply channels 150a, 150b to the bore 80 in which the control valve 20 sits.
  • the control valve 20 can be arranged to selectively close either bleed line 160a or 160b while opening the carrier channel 30, in which case chemical is drawn into the carrier flow from the corresponding one of the separate container chambers.
  • the bleed lines 160a, 160b are shaped so that the inlets to the bleed lines are aligned and spaced longitudinally in the bore 80.
  • the carrier control section 26 of the control valve 20 is essentially similar to that in the embodiment illustrated in Figures 1 and 2A-2D.
  • the bleed control section 128 of the control valve 20 is longitudinally bifurcated into separate levels 128a, 128b for engagement with these separate bleed lines 160a, 160b. Each of these levels 128a, 128b has two stopper pads 129al, 129a2 and 129bl, 129b2, respctively.
  • stopper pads like the stopper pad 29a of the carrier control section 26, are situated in depressions on the surface of the control valve 20 and fit tightly against the inside of the bore 80 when the control valve 20 is in the bore 80. Again, a boss at the bottom of each depression mates with a receiving hole on the underside of each stopper pad to prevent circumferential slippage.
  • the stopper pads of each level 128a, 128b of the bleed control section 128 are circumferentially spaced, with a gap 164a, 164b, respectively, separating them.
  • the control valve 20 When the control valve 20 is positioned so that one of these gaps 164a or 164b between the stopper pads is aligned with the inlet to its corresponding bleed line 160a or 160b, the corresponding chemical supply channel 150a or 150b is in communication with the ambient air through the bleed line. On the other hand, when either of the stopper pads of a level 128a or 128b of the bleed control section 128 is aligned with the inlet to its corresponding bleed line 160a or 160b, that bleed line will be closed. In this embodiment, like the first, the control valve 20 has an approximately
  • the additional bleed line and bleed control section level permit at least one additional operational mode.
  • the sprayer 10 of this embodiment has four operational settings.
  • the stopper pad 29a of the carrier control section 26 and one of the stopper pads 129al, 129bl, respectively, of each level 128a, 128b of the bleed control section 128 are aligned longitudinally on the control valve
  • the mouth of the carrier duct 27 is elongated so that the other stopper pads 129a2, 129b2, and the gaps 164a, 164b between the stopper pads of each level, respectively, of the bleed control section 128 are all longitudinally in line with part of the mouth of the carrier duct 27.
  • either the other stopper pad 129a2 or 129b2, or the gap 164a or 164b, respectively can be aligned with the corresponding bleed line 60 when the carrier duct 27 is aligned with the carrier channel 30.
  • the other stopper pads 129a2, 129b2 of the respective levels of the bleed control section 28, however, are not longitudinally aligned with one another.
  • the carrier duct 27 when the carrier duct 27 is aligned with the carrier channel 30, representing the second through fourth operational settings, either or neither, but not both, of the other stopper pads 129a2, 129b2 can be aligned with the inlet of its respective bleed line 160a, 160b.
  • each of the gaps 164a, 164b is aligned with the inlets to its respective bleed line 160a, 160b.
  • the other stopper pad 129a2 of the upper level 128a is aligned with its bleed line 160a, while the gap 164b of the lower level is still aligned with its bleed line 160b.
  • valve 20 can be configured to move differently.
  • the valve 20 can be configured to rotate on a different axis, or to slide longitudinally rather than rotate, as will be appreciated by those skilled in the art.
  • the separate container chambers can be provided with different chemicals or different concentrations of the same chemical.
  • one chamber can be provided with a cleaning agent in a concentration that is suitable for spray washing.
  • the other chamber can be provided with a rinsing agent in a concentration suitable for pre-washing and/or rinsing.
  • the four operational settings would then correspond to "off,” “water only,” “cleaning agent and water mixed,” and “rinsing agent and water mixed,” respectively.
  • a sprayer of the present invention is particulary applicable to hose-end sprayers.
  • the sprayer can be used in conjunction with fertilizers, pesticides, and the like, but is best suited for use with soaps.
  • the carrier fluid in most cases tap water, can be used, with no soap or only trace amounts thereof, to soak and/or rinse the object to be washed. By simply turning the control valve, the sprayer can be turned off or set to spray water or a mixture of soap and water.

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Abstract

L'invention concerne une tête de pulvérisation à aspiration de produits chimiques qui comprend un canal (30) porteur présentant une entrée (12), une sortie (14) à travers laquelle s'écoule le fluide porteur et une chambre d'expansion (32) entre l'entrée et la sortie. Le pulvérisateur comprend également un canal d'alimentation en produits chimiques en communication fluidique avec la chambre d'expansion du canal porteur à travers une ouverture d'aspiration (49) et une conduite de purge (60) s'étendant du canal d'alimentation en produits chimiques entre l'ouverture d'aspiration et le produit chimique liquide, la conduite de purge étant connectée au canal d'alimentation en produits chimiques en communication fluidique avec l'air ambiant. Une soupape de commande (20) se trouve dans la tête de pulvérisation pour mettre simultanément en contact le canal porteur et la conduite de purge avec le canal porteur ouvrant et fermant sélectivement la conduite d'alimentation pour permettre à l'air ambiant de pénétrer de manière sélective dans le canal d'alimentation en produits chimiques en réaction à l'écoulement d'aspiration produit par l'écoulement du fluide porteur.
PCT/US1998/001576 1998-02-06 1998-02-06 Pulverisateur a aspiration WO1999039835A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/US1998/001576 WO1999039835A1 (fr) 1998-02-06 1998-02-06 Pulverisateur a aspiration
CA002319366A CA2319366C (fr) 1998-02-06 1998-02-06 Pulverisateur a aspiration
US09/601,302 US6345773B1 (en) 1998-02-06 1998-02-06 Aspiration-type sprayer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/001576 WO1999039835A1 (fr) 1998-02-06 1998-02-06 Pulverisateur a aspiration

Publications (1)

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WO1999039835A1 true WO1999039835A1 (fr) 1999-08-12

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PCT/US1998/001576 WO1999039835A1 (fr) 1998-02-06 1998-02-06 Pulverisateur a aspiration

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WO (1) WO1999039835A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719704A (en) * 1954-12-20 1955-10-04 Leslie V Anderson Chemical mixing nozzle and water shut-off valve
US2724583A (en) * 1953-06-19 1955-11-22 Targosh Ted Hose apparatus with liquid mixing nozzle
US3563468A (en) * 1969-06-23 1971-02-16 Jo Anne Tallcouch Mixing faucet
US3610535A (en) * 1969-09-03 1971-10-05 Mite Corp Liquids mixing and selective delivery system
US3764074A (en) * 1972-01-20 1973-10-09 D James Shower head and liquid agent dispensing attachment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724583A (en) * 1953-06-19 1955-11-22 Targosh Ted Hose apparatus with liquid mixing nozzle
US2719704A (en) * 1954-12-20 1955-10-04 Leslie V Anderson Chemical mixing nozzle and water shut-off valve
US3563468A (en) * 1969-06-23 1971-02-16 Jo Anne Tallcouch Mixing faucet
US3610535A (en) * 1969-09-03 1971-10-05 Mite Corp Liquids mixing and selective delivery system
US3764074A (en) * 1972-01-20 1973-10-09 D James Shower head and liquid agent dispensing attachment

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Publication number Publication date
CA2319366A1 (fr) 1999-08-12
CA2319366C (fr) 2005-01-04

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