Field of the Invention
The present invention relates to spray nozzles configured for use when spraying consumer goods such as cleaning fluids or personal care products. More particularly, this invention relates to a nozzle assembly for use with low-pressure, trigger spray or “product only” (meaning propellantless) applicators and in preferred embodiments to a modular spray nozzle assembly having multiple interchangeable fluidic circuit components.
Discussion of the Prior Art
Generally, a trigger dispenser for spraying consumer goods is a relatively low-cost pump device which is held in the hand and which has a trigger operable by squeezing or pulling the fingers of the hand to pump liquid from a container and through a nozzle at the front of the dispenser.
Such dispensers may have a variety of features that have become common and well known in the industry. For example, the dispenser may be a dedicated sprayer that produces a defined spray pattern for the liquid as it is dispensed or issued from the nozzle, but it is also known to provide dispensers with adjustable spray patterns so that with a single dispenser the user may select a spray pattern that is in the form of either a stream or a substantially conical spray of liquid droplets.
Many substances are currently sold and marketed as consumer goods in dispensers having containers with trigger sprayers. Examples of such substances include air fresheners, window cleaning solutions, personal care products and many other materials for other general spraying uses. Consumer goods using these dispensers are typically packaged as a container such as a bottle that carries a spray head, which typically includes a manually actuated pump, which a user aims at a desired surface or in a desired direction. The operating pressures of such manual pumps are generally in the range of 30-40 psi and typically emit conical sprays that are typically very sloppy, and which spray an irregular pattern of small and large drops.
Dispensers recently have been introduced into the marketplace which have battery operated pumps in which the operator only has to press the trigger once to initiate a pumping action that continues until pressure on the trigger is released. These devices typically operate at lower pressures than manually operated trigger sprayers, usually in the range of 5-15 psi. They also suffer from the same deficiencies as noted for manual pumps; plus, due to their lower operating pressures they appear to have even less variety in or control of the spray patterns that can be generated.
The sprayer heads for prior art dispensers typically incorporate nozzles of the one-piece molded “cap” variety, incorporating channels corresponding to either the offered “spray” or “stream” patterns that can be lined up with a feed channel coming out of a sprayer head assembly (see, e.g., Calmar's nozzle cap 28 as illustrated and described in U.S. Pat. No. 6,126,090, or nozzle member 24 as illustrated and described in U.S. Pat. No. 8,864,052 and shown in Prior Art FIGS. 1 and 2 herein). These nozzles traditionally include a “spin chamber” or “swirl cup” and the spray generated by such prior art nozzles (see, e.g., Calmar's nozzle as illustrated and described in U.S. Pat. No. 4,706,888) is generally “swirled” within the nozzle assembly to form a spray (as opposed to a stream) having droplets scattered across a wide angle, producing droplets of varying sizes and velocities.
The manually actuated sprayer of U.S. Pat. No. 6,793,156 to Dobbs, et al illustrates an improved swirl cup, or orifice cup, mounted within the discharge passage of a manually actuated hand-held sprayer. The cup is held in place by press fitting its cylindrical side wall within the wall of a circular bore. Dobbs' cup includes “spin mechanics” in the form of a spin chamber, wherein spinning or tangential flows are formed on the inner surface of a circular base wall of the orifice cup. Upon manual actuation of the sprayer, pressures are developed as the liquid product is forced through a constricted discharge passage and through the spin mechanics before issuing through the discharge orifice in the form of a traditional conical spray. If no spin mechanics are provided or if the spin mechanics feature is immobilized, the liquid issues from the discharge orifice in the form of a stream.
Typical orifice cups are molded with a cylindrical skirt wall, and have an annular retention bead that projects radially outwardly of the side of the cup near the front or distal end thereof. The orifice cup is typically force fitted within a cylindrical bore at the terminal end of a sprayer discharge passage in tight frictional engagement between the cylindrical side wall of the cup and the cylindrical bore wall. The annular retention bead is designed to project into the confronting cylindrical portion of the pump sprayer body, serving to assist in retaining the orifice cup in place within the bore as well as in acting as a seal between the orifice cup and the bore of the discharge passage. The spin mechanics feature is formed on the inner surface of the base of the orifice cup to provide a swirl cup which functions to swirl the fluid or liquid product and break it up into a substantially conical spray pattern.
In some prior art dispensers the traditional swirl nozzle geometry is integrated into the trigger sprayer's body, for example on a sealing post, and is completed by the exit aperture geometry (hole) contained on the nozzle cap. If the swirl geometry is not integrated into the sprayer's body, then it is typically in the back side of the trigger nozzle cap.
Typical prior art nozzle assemblies such as the foregoing are not satisfactory for users who want precisely patterned sprays of uniformly sized droplets. All of these nozzle assembly or spray-head structures with swirl chambers are configured to generate substantially conical atomized or nebulized sprays of fluid or liquid in a continuous flow over the entire spray pattern, but in fact the droplet sizes are poorly controlled, often generating “fines” or nearly atomized droplets. Other spray patterns (e.g., a narrow oval which is nearly linear) are possible, but the control over the spray's pattern is limited. None of these prior art swirl chamber nozzles can generate an oscillating spray of liquid or provide precise sprayed droplet size control or spray pattern control.
Oscillating fluidic sprays, such as those described in commonly owned U.S. Pat. No. 7,354,008, have many advantages over conventional, continuous sprays, and can be configured to generate an oscillating spray of liquid or to provide a precise sprayed droplet size control or precisely customized spray pattern for a selected liquid or fluid. The applicants have been approached by liquid product makers who want to produce dispensers with these advantages, but prior art fluidic nozzle assemblies have not been configured for incorporation with disposable, manually actuated sprayers like those described above.
In prior art fluidic circuit nozzle configurations, a fluidic nozzle is constructed by assembling a planar fluidic circuit or insert into a housing having a cavity that receives and aims the fluidic insert and seals the flow passage. A good example of a fluidic oscillator equipped nozzle assembly as used in the automotive industry is illustrated in commonly owned U.S. Pat. No. 7,267,290 (see, e.g., FIG. 3 of the '290 patent), which shows how a planar fluidic circuit insert is received within and aimed by the housing. Another example is found in FIGS. 3A and 3B of applicants' PCT/US12/34293, entitled Cup-shaped Fluidic Circuit, Nozzle Assembly and Method (now WIPO Pub. WO 2012/145537), the entire disclosure of which is incorporated herein by reference. In this application, a fluidic cup is configured as a one-piece fluidic nozzle which does not require a multi-component insert and housing assembly, and which incorporates fluidic oscillator features or geometry molded directly into the cup, which is then affixed to the nozzle. This fluidic cup conforms to the actuator stem used in typical aerosol sprayers and trigger sprayers and so replaces the prior art “swirl cup” that goes over the actuator stem. This fluidic cup is useful with both hand-pumped trigger sprayers and propellant filled aerosol sprayers and can be configured to generate different sprays for different liquid or fluid products.
Fluidic circuit generated sprays could be very useful in disposable, manually actuated sprayers, but adapting the fluidic circuits and fluidic circuit nozzle assemblies of the prior art would cause additional engineering and manufacturing process changes to the currently available disposable, manually actuated sprayers, thus making them too expensive to produce at a commercially reasonable cost.
There is a need, therefore, for a commercially feasible and inexpensive, disposable, manually actuated sprayer or nozzle assembly which provides the advantages of fluidic circuits and oscillating sprays, including precise sprayed droplet size control and precisely defined and controlled custom spray patterns for a selected liquid or fluid product.
Accordingly, it is an object of the present invention to overcome the above mentioned difficulties by providing a commercially feasible, inexpensive, disposable, manually actuated fluid dispenser, or sprayer, incorporating a nozzle assembly which provides the advantages of fluidic circuits and oscillating sprays, including precise sprayed droplet size control and precisely defined and controlled custom spray patterns for a selected liquid or fluid product.
In accordance with the present invention, a new and improved modular nozzle assembly overcomes the disabilities of prior fluid dispenser spray assemblies by the provision of one or more fluidic plates, each configured to selectively create a corresponding precise 2-D or 3-D spray pattern of a liquid product. Existing trigger spray nozzles for use in spraying consumer goods are reconfigured to include snap-on features that enable a user to change their outputs from a traditional spray (swirl) type to a selected fluidic plate having a desired fluidic-circuit generated output spray configuration. To accomplish this, a modular spray head assembly incorporates a nozzle cap having first and second opposed slots or snap openings on opposite sides of a central flow supply opening. These slots are configured to receive and support ‘snap on’ features such as mounting tabs on a modular fluidic plate component. This new “snap-on” fluidic plate is configured for installation on the face of a nozzle cap, with the mounting tabs engaging the slots, or snap openings, on the cap, and is easily configured to fit pre-existing or new similarly designed trigger spray nozzle caps with attachment features.
The modular snap on fluidic plate is preferably configured as a planar generally disc-shaped fluidic circuit insert for use in a modular spray head assembly and has a two channel oscillation-inducing geometry defined in an underside, or proximal (near), side of the disc. The fluid oscillation-inducing geometry is preferably molded into the underside or proximal side of the fluidic plate and is defined by a chamber having a central interaction region located between a first power nozzle and second power nozzle, and which is in fluid communication with a discharge orifice extending through the plate from the fluidic circuit to the distal plate surface. The first power nozzle is configured to accelerate the movement of passing pressurized fluid flowing through it to form a first jet of fluid flowing into the chamber's interaction region, and the second power nozzle is similarly configured to accelerate the movement of passing pressurized fluid flowing through it to form a second jet of fluid flowing into the chamber's interaction region. The first and second jets so formed collide and impinge upon one another in the interaction region at a selected inter-jet impingement angle (e.g., 180 degrees, meaning the jets impinge from opposite sides). This impingement generates oscillating flow vortices of spray droplets within the interaction region, and these oscillating flow vortices cause the spray droplets to flow through the discharge orifice as an oscillating spray of substantially uniform fluid droplets in a selected 2-D or 3-D spray pattern having a selected spray width and a selected spray thickness. The fluidic circuit incorporated in the modular insert of the present invention is configurable to function in a manner similar to the fluidic circuit illustrated in the above-mentioned PCT/US12/34293 application.
In brief, then, the modular nozzle assembly of the invention, in a preferred form, incorporates one or more user selectable and user changeable fluidic plates or fluidic circuit members which are each configured to create precise 2-D or 3-D spray patterns of a liquid product. The fluidic circuit members may be incorporated in a sprayer kit to provide a user configurable modular nozzle assembly for configuring a trigger sprayer for a selected spray pattern. The kit may also include a nozzle assembly with a nozzle cap having a retaining feature, such as retainer slots, for receiving and removably securing a selected one of the modular fluidic circuit insert elements provided in the kit. A user may use the kit to replace an existing nozzle, if it does not incorporate a retaining feature, and may select a desired fluidic circuit member from the kit for assembly to the nozzle and to the dispenser to provide a selected nozzle spray configuration. The kit components may be used with a dispenser nozzle that incorporates a traditional swirl nozzle geometry integrated into the trigger sprayer's body, for example on a sealing post, but applicants prefer that the trigger sprayer body or nozzle cap not have a swirl geometry and thus prefer to replace a swirl geometry with a basic planar sealing surface to allow for the conventional ON/OFF shut off function to remain via the fluid feed channels.
The above and still further objects, features and advantages of the present invention will become apparent upon consideration of the following detailed description of a specific embodiment thereof, particularly when taken in conjunction with the accompanying drawings, wherein like reference numerals in the various figures are utilized to designate like components.
Turning now to a more detailed consideration of the drawings,
The distally projecting sealing post 17 in the low cost trigger sprayer 10 shown in
The present invention (to be described) may be used with dispensers having preexisting sealing post swirl geometry (like that illustrated in
Another example of applicant's own prior art is illustrated in
The cup-shaped fluidic nozzle 80 is mounted in a dispenser body member 92 of the spray head, and has a peripheral wall 94 extending proximally into a bore 94 in the body 92, radially outwardly of the sealing post 88, to form a fluid passageway 98. The distal, or radial end wall 86 of cup 80 has an inner face opposing the sealing post's distal or outer face 100 to define a fluid channel 102 including a chamber having an interaction region 104 between the sealing post and the fluidic circuit component 84 on the distal wall 86. The chamber 104 is in fluid communication with the fluid passage 102 to define a fluidic circuit oscillator inlet so that pressurized fluid indicated by arrows 110 can enter the fluid interaction region and be ejected as a spray 82 having a pattern defined by the fluidic circuit.
The shortcomings of the prior art have been discussed hereinabove, and to overcome these in order to provide a modular fluidic spray system which may be in the form of a kit or collection of various modular components which may be assembled to provide the consumer or user with several distinct selectable spray configurations, the present invention provides a modular assembly, embodiments of which are illustrated in
The modular nozzle assembly of the invention includes a spray head, or nozzle member 150 that is configured to receive a detachable fluidic circuit carrier 152, here illustrated as a plate, or disc, and in some configurations as a cup-shaped member (to be described). The carrier incorporates a fluidic circuit 154 configured to selectively create precise 2-D or 3-D spray patterns of a liquid product for use by consumers for dispensing or applying liquid products. As illustrated, the nozzle cap member 150 is generally cup-shaped, having a side wall 160 shaped to be secured to the front end of a conventional dispenser housing such as that illustrated in
The nozzle cap member 150 has a distal end wall 164 having a central aperture 166 for receiving, when placed on a dispenser, a conventional tubular sealing post 168, similar to the sealing post 17 of the device of
In the illustrated embodiment, the fluidic circuit modular component or plate 152 is generally disc-shaped, or circular, as viewed in the front plan view of
More particularly, the fluidic circuit modular disc or plate 152 carries, on it's back or interior surface a first latching tab 190 projecting proximally away from the interior surface near the plate's periphery, and that first latching tab 190 has a beveled head defining an angled surface which tapers outwardly from the proximal tip to a barb-like retaining edge 196 which faces the fluidic circuit modular plate's peripheral edge 184. On the opposing edge of plate peripheral edge 184, a second latching tab 192 is spaced apart from the first latching tab 190 and projects proximally away the back or interior surface and the second latching tab also has a beveled head defining an angled surface which tapers outwardly from a proximal tip to a barb-like retaining edge 198 which faces away from the first tab's beveled taper and toward the plate's circular periphery. First and second latching tabs 196 and 198 are configured to snap into and releasably engage corresponding slots 170, 172 within the distal exterior surface of spray cap modular member 150, and by the spring bias force of the latching tabs, press the plate into the spray cap to define a fluid tight connection therebetween.
Surrounding the sealing post 168 and the aperture 166 in the front wall of nozzle 150 is an upstanding central sealing wall 210 having a central rim 212 surrounded by a stepped shoulder 214. When the plate 152 is snapped into place on the face of nozzle member 152, the rim 212 of central wall 210 engages a corresponding annular channel 216 on the proximal (inner) surface 194 of plate 152 and shoulder 214 engages the inner wall surface 194 to enclose the sealing post 168. This forces fluid flowing from the dispenser into the fluidic circuit 154 on the back of plate 152.
The outer, or distal surface 220 of plate 152 has a central raised portion 222 through which extends a spray orifice 224. The fluidic circuit 154 is formed in the rear, or proximal surface 194 of the plate, as by molding, and in known manner consists of a central interaction region 226 at the intersection of power nozzles (see
Although the foregoing describes a unit having a centrally located spray outlet or discharge orifice 224 on fluidic plate 152, it will be recognized that it may be desirable to provide a plate having an offset spray outlet orifice, so that the spray issues from an orifice near the top, bottom, or one side of the nozzle member. In such a case, the fluidic circuit would be misaligned with the centrally-located sealing post (e.g., 17, 46 or 66), as shown in the embodiment illustrated in
Nozzle members such as that illustrated at 150 in
Another application of the modular fluidic circuit system of the invention is illustrated with respect to a prior art fluid trigger spray dispenser known as a “Starblaster”, illustrated in
The piston sealingly slides in a pressure chamber 312 along a pressure axis Y, between a rest position, wherein the volume of the pressure chamber is maximum, and a limit dispensing position, wherein the volume of the pressure chamber is minimal, passing through intermediate dispensing positions. The spray head incorporates a dispenser duct 314 extending along the dispensing axis Z, to a distal extremity 316, at a nozzle member 320, which is attached to the distal extremity 316 of the dispenser duct 314, to enable spraying or dispensing of the liquid in the desired manner. The pressure chamber 312 is in fluidic communication with the dispenser duct 314.
The sprayer head 302 includes valve dispenser apparatus suitable for allowing the transit of liquid from the pressure chamber 312 to the dispenser duct 314 when, during the dispensing phase, the piston 310 moves from a rest position towards a dispenser limit position, and the liquid exceeds a predefined pressure threshold. The valve dispenser may comprise an elastically deformable diaphragm attached to a dispenser frame 322, which has a secondary liquid aspiration duct that co-operates in the connection of the pressure chamber 312 with a compartment inside the container. The head 302 thus comprises valve dispenser means suitable for allowing the transit of liquid towards the pressure chamber 312 when, during a return phase, the piston moves towards its rest position from its dispenser limit position, and prevents transit of the liquid from the pressure chamber during the dispensing phase. Thus, in its initial rest configuration, the piston is in the rest position, the valve dispenser is closed, the valve aspiration apparatus is closed, the air aspiration passage towards the outside is closed, and the presence of liquid to dispense in the pressure chamber 312 is presumed. In the dispensing phase, the piston completes a dispensing stroke from the rest position to the limit dispensing position by manual activation of a trigger 330. By effect of the liquid in the pressure chamber, the liquid aspiration valve remains closed, preventing the backflow of liquid towards the container. Similarly, by effect of the pressurized liquid, the valve dispenser is open, making the liquid travel from the pressure chamber 312 to the dispenser duct 314, thereby enabling dispensing from the nozzle 320 via an exit orifice 340.
An embodiment of the nozzle member 320 is illustrated in enlarged detail in
It will be understood that the illustration of
For example, in
By replacing the generally cup-shaped spray guide 346 of
It will be understood that substitution of a spray guide incorporating a fluidic plate, such as that illustrated at 372, in the device of
A similar modification of the dispenser nozzle member 320 illustrated in
In summary, and referring to the figures and description above, persons having skill in the art will appreciate that the disclosure of present invention provides, among other things, a conformal, unitary, one-piece fluidic circuit modular component configured for easy and economical incorporation into a modular trigger spray nozzle assembly or aerosol spray head actuator body including a distally projecting sealing post and a lumen for dispensing or spraying a pressurized liquid product or fluid from a transportable container to generate an exhaust flow in the form of an oscillating spray of fluid droplets, comprising the following illustrated features:
(a) a disc-shaped or cup-shaped fluidic circuit modular component or carrier having a transverse inner face with features defined therein and configured to abut or receive an actuator sealing post's transverse, planar end face surface; and
(b) the fluidic circuit modular component or carrier's inner face having surfaces comprising a fluid channel including a chamber when the fluidic circuit modular component or member is configured to be detachably fitted to the spray head actuator body's sealing post or removed by a user or consumer.
Preferably, the fluidic circuit modular component or member's chamber is configured to define a fluidic circuit oscillator inlet in fluid communication with an interaction region so when the fluidic circuit modular component is fitted to the body's sealing post and pressurized and fluid is introduced via the actuator body, the pressurized fluid may enter the fluid channel's chamber and interaction region and generate at least one oscillating flow vortex within the fluid channel's interaction region. The disc-shaped or cup shaped member's transverse distal wall includes a discharge orifice in fluid communication with the chamber's interaction region, and the chamber is configured so that when the fluidic circuit modular component is fitted to the body's sealing post and pressurized, and fluid is introduced via the actuator body, the chamber's fluidic oscillator inlet is in fluid communication with a first power nozzle and second power nozzle. The first power nozzle is configured to accelerate the movement of passing pressurized fluid flowing through the first nozzle to form a first jet of fluid flowing into the chamber's interaction region, and the second power nozzle is configured to accelerate the movement of passing pressurized fluid flowing through said second nozzle to form a second jet of fluid flowing into said chamber's interaction region. The first and second jets impinge upon one another at a selected inter-jet impingement angle and generate oscillating flow vortices within said fluid channel's interaction region.
The present invention may be configured as a kit having a spray head similar to those shown in
When the user or consumer wants to assemble or reconfigure and use the modular nozzle assembly of the present invention, the user locates the distally projecting sealing post (e.g., 64) centered within the spray head's body locates the snap-fit peripheral detent wall groove configured to resiliently receive and retain the removable spray cap member (e.g., 150) which is automatically axially aligned with the spray head when press-fit into place. The user may then rotate the removable spray cap member (e.g., 150) about the spray head axis to orient the spray pattern (e.g., vertical, with the spray's major axis aligned vertically and parallel to the product packages major axis). Once installed, the removable spray cap member (e.g., 150) encloses and seals the fluidic circuit oscillator inlet in fluid communication with spray head and a test spray can be performed to demonstrate that when pressurized fluid is introduced into the nozzle assembly, the pressurized fluid enters the fluidic's interaction chamber and generates at least one oscillating flow vortex which is aligned to provide a desired spray.
In alternative configurations, the ‘swapped’ or user reconfigurable geometry described above may also be packaged for OEM product vendors at the point of manufacturing—prior to trigger sprayer assembly. Alternative configurations with increased inlet or feed channel size leading into the fluidic/nozzle would facilitate a lower trigger effort. Alternative designs can combine one of the sprayer configurations with alternative spray modes built-in to the spray cap modular member 250, so that a multimode (oscillating droplet generating spray, stream, off) function.
The modular plates, modular cups and offset plates all may be configured for use with rotating spray cap modular members to adjustable spray orientations. Users will most likely prefer either a vertical or horizontal spray pattern for controlled dispensing of the fluid. If the product to be sprayed is typically available in a generic trigger sprayer and can be used for multiple types of fluids then the end user would enjoy having the ability to change from a mist nozzle for Air Care products, to a single inlet fluidic spray (e.g., 152) for a spray with fewer fine particles to inhale. An OEM product vendor may also choose to provide an offset plate fluidic (e.g., 252) for packaging space or to provide a foaming nozzle option for the user. The modular configuration and method of the present invention also enables a large OEM the ability to use a common a trigger sprayer platform for multiple brands/products with little added investment. This is an important economic advantage because the OEM can create a common package look or brand image across multiple products but yet still have functionally different spray outputs.
Having described and illustrated preferred embodiments of a new and improved modular nozzle assembly, it is believed that other modifications, variations and changes will be suggested to those skilled in the art in view of the teachings set forth herein. It is therefore to be understood that all such variations, modifications and changes are believed to fall within the scope of the present invention as defined by the following claims.
This application claims priority benefit to (a) commonly owned co-pending patent application No. 61/971,078 filed on Mar. 27, 2014, the entire disclosure of which is incorporated herein by reference. This application is also related to commonly owned U.S. Pat. No. 7,354,008 entitled Fluidic Nozzle for Trigger Spray Applications, and PCT application number PCT/US12/34,293, entitled Cup-shaped Fluidic Circuit, Nozzle Assembly and Method (now WIPO Pub WO 2012/145537), the entire disclosures of which are hereby incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/US15/22938 | 3/27/2015 | WO | 00 |
Number | Date | Country | |
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61971078 | Mar 2014 | US |