RU2383395C2 - Sprayer gun pot with increased diametre orifice for dast filling - Google Patents

Abstract

FIELD: mechanics. ^ SUBSTANCE: proposed pot is attached to sprayer gun. Said pot has first end, second end spaced a bit apart from first end, face wall on first end and sidewall arranged between face wall and second end. Said face wall has a tip with liquid discharge orifice, which communicates with aforesaid pot. Said tip is attached to sprayer gun for aforesaid pot to be jointed to sprayer gun liquid inlet. Proposed pot has cover furnished with tip. Said detachable cover is attached to said pot around the orifice made in face wall. Note here that orifice side edge is located inside relative to sidewall. Face wall orifice size exceeds that of tip. Pot can be detached from the cover to add liquid into the former via face wall orifice. ^ EFFECT: simple-design liquid-feed system. ^ 11 cl, 17 dwg

Description

Field of Invention

The present invention is intended to improve the fluid supply system in spray devices, such as, for example, a spray gun. In particular, the present invention is relevant for fluid supply systems in which a reservoir containing spray liquid is mounted on a spray gun.

BACKGROUND OF THE INVENTION

Spray guns are widely used in various industries for applying liquid substances to surfaces. In known atomizer designs, the liquid is located in a reservoir attached to the atomizer, from where it is supplied to the atomizer nozzle. After exiting the spray nozzle, the liquid is crushed into small particles under the influence of compressed air and forms a spray (aerosol). Liquid can be supplied by gravity, by suction, or, as is done in the most modern designs of spray guns, by forcing compressed air from a special line into a paint tank or directly into a spray gun.

Spray guns are usually used in car repair shops to repair new bodies in areas that have been repaired. A typical painting procedure involves applying a primer, a lower coat of paint, a top coat of paint and a clear varnish. Traditionally, the reservoir is a rigid container, detachably mounted on the spray using screw threads located on the spray and the tank. When changing the sprayed liquid, the sprayer itself and the container must be thoroughly cleaned to avoid contamination, which can adversely affect the painting. This circumstance is especially important when painting a repaired part, when exact matching of its color to the general color of the product is required. The spray and tank cleaning procedure is time consuming, and often it is necessary to use expensive solvents, which, moreover, can be harmful to the operator’s health.

Earlier in Invention WO 98/32539, we proposed a reservoir in which fluid is contained within a disposable cap / liner assembly. The liner is in the form of an open-top container that fits exactly into the inner part of the external rigid container, while the cap is attached to the open part of the liner using a union washer-nut screwed onto the container. The reservoir is detachably connected to the spray gun using a mouthpiece that is integral with the cap, and the liquid in the process of operation of the device exits through the specified mouthpiece.

Thus, after spraying, the tank can be disconnected from the spray gun, and the cap / liner assembly can be removed from the external container and disposed of. The outer container and union washer-nut can then be used again to apply new fluid in combination with a new clean liner and cap. As a result of this, the amount of cleaning required is significantly reduced, and the spray gun can be easily adapted to work with various liquids.

In some cases, a larger amount of liquid may be required than a single tank holds, such as when painting a large area or when applying one paint in several layers, as happens with a primer or varnish. In this case, the tank can be disconnected from the sprayer, the union washer-nut is unscrewed, the cap is removed, after which the liquid can be poured into the liner. After that, the tank is again collected and attached to the sprayer.

Dismantling and assembling the tank takes a considerable amount of time and can lead to liquid spills, especially when the cap is removed from the liner. In addition, adding fluid to the liner with the cap removed increases the risk of dirt and dust from other sources.

An alternative to the above filling method, which consists in adding liquid to the tank through the mouthpiece, which is integral with the cap, is a slow process due to the fact that the diameter of this mouthpiece is small and comparable to the size of the nozzle on the spray gun used to connect the tank, which is why this mouthpiece cannot be freely poured into a container. In addition, there may be a filter inside the mouthpiece, or the filter may be on the inside of the cap at the mouth of the mouthpiece, which is done to remove unwanted solid particles from the spray (sprayed liquid). Access to such a filter is possible only by disassembling the tank, and the presence of such a filter slows down the addition of fluid to the tank through the mouthpiece.

In addition, if the liquid contains solid particles, then when the liquid is poured through the mouthpiece, these particles will remain on the outside of the filter. As a result, after reconnecting the reservoir to the atomizer, these particles can be entrained in the liquid leaving the reservoir and enter the atomizer, which will lead to its clogging. Also, they can get into the spray, which will lead to the need to repeat the painting work.

SUMMARY OF THE INVENTION

The present invention is intended to further improve the existing system and provides the user with additional benefits and advantages.

Namely, this invention allows to create a simple fluid supply system for a spray gun.

Further, the present invention allows the creation of a fluid supply system for a spray gun, which can be supplied both empty and filled with fluid.

In addition, the implementation of the present invention allows you to create a fluid supply system for the spray gun, which can be disposed of after use, without wasting time on cleaning.

Other benefits and advantages of the present invention are listed below.

According to the present invention, there is provided a fluid supply system for a spray device such as a spray gun, as defined in claim 1.

The term “liquid” in this Patent Application refers to all types of flowable materials that can be applied to a surface using a spray device (whether or not these materials are intended for surface painting), including (without limitation) paints, primers, colorless bases, varnishes, varnishes, and other materials similar to paints, as well as other materials such as adhesives (adhesives), sealants, fillers (fillers), fillers, powder coatings, explosives, are abrasive solutions, lubricants for molds and coatings for cast products which may be applied either as a spray, or otherwise, depending on the properties and / or purpose of the material, with appropriate interpretations of the term "liquid."

In this invention, the liquid is discharged from the reservoir through a channel in the mouthpiece that is integral with the removable lid of the reservoir, as a result of which the opening in the reservoir can be larger than the outlet of the fluid and the reservoir can be disconnected from the lid to add liquid to it through hole without disassembling the tank itself. Thus, the liquid is easily added to the tank, and the risk of spillage and / or contamination is reduced.

This design of the tank is especially convenient if its volume is less than the volume of liquid required to perform a certain job. For example, when spraying a large area, the user can disconnect the tank from the lid and add liquid to it, and then reattach it to the lid.

This tank design is also convenient in case it is necessary to dilute the sprayed liquid. For example, when applying a layer of finishing varnish, the user can disconnect the tank from the lid, add solvent to reduce the viscosity of the varnish to the required degree, and then reattach the tank to the lid.

The reservoir may shrink as fluid flows. For example, the side wall of the tank may be flexible compared to the end wall, which will allow it to deform or compress in the axial direction from the second end to the first end. Preferably, the end wall is rigid compared to the side wall, which will ensure the stability of the tank and allow the user to firmly hold the tank when it is attached and the lid and disconnected from it, without compressing the tank. A tank design is preferred in which the tank is provided with a relatively rigid base at the second end so that the tank can be turned over and put on the base when filling it with liquid through an opening in the other end wall.

The tank may be made from a single piece, for example, molded or blown out. Another embodiment of the reservoir is a bottom and a side wall made of one piece, while the upper wall is a separate piece attached to the side wall. For example, the bottom and side wall can form a container with an open top, and the upper wall can form a removable cap for this container. This cap can be fixedly attached to the container, for example glued or welded. Another option for attaching the cap is its removable fastening to the container, for example fastening to the container with latches.

The cap can be screwed onto the tank. Another option for attaching the lid is its removable attachment to the tank using other means, such as snap fastening. A preferred lid design is one in which it has a base provided with an adapter sleeve with an internal thread into which an adapter sleeve with an external thread will be screwed to define a hole in the tank, the mouthpiece extending from the base of the cover away from the tank.

The mouthpiece has a smaller diameter compared with the hole in the end wall of the tank and is used to connect to the inlet channel of the sprayer. For example, the diameter of the mouthpiece may be more than two times less than the diameter of the hole in the end wall of the tank, and it is preferable that it be less than one third of the diameter of this hole, and even more preferably, it is less than one fourth of the diameter of this hole. In one implementation of the present invention, the hole has a diameter of 50-60 mm, preferably 53 mm (about 2 "), while the mouthpiece has a diameter of 10-15 mm (about 1/2").

Preferably, the hole was located in the center of the end wall, since in this case its size can be maximized, which will contribute to the rapid filling of the tank.

It is preferable that the mouthpiece on the lid is on the same axis as the hole in the tank, so that when the tank is attached to the sprayer, the tank is aligned with the longitudinal axis of the sprayer, thereby avoiding inconvenience of use due to imbalance of the sprayer.

Preferably, the cap design provides a removable connection to the spray device. For example, the cap and spray device may be provided with mutually corresponding engagement elements. Thus, the cap could be attached to and disconnected from the spray device, both with and without a tank attached to it, with minimal effort and skill.

Preferably, the spray gun would be provided with a receiving sleeve into which the mouthpiece is inserted, and engaging elements which, after their mutual engagement, would hold the mouthpiece in the receiving sleeve. This receptacle may be integral with the spray, or it may be a part attached to the spray. For example, a receiving sleeve may be formed by a connecting device (adapter) attached to the spray gun.

One of the options is the location of the engagement grooves inside the receiving clutch, and on the mouthpiece there are reciprocal protrusions included in these grooves. In another embodiment, the engagement elements are located outside the receiving clutch. For example, the coupling may have an external flange interacting with a pair of hook-shaped elements extending from the base of the tank lid on opposite sides of the mouthpiece.

Preferably, the engagement elements engage / disengage with less than one full rotation of the cap relative to the spray gun, and the detachable connection of the cap and reservoir is arranged so that the reservoir does not detach from the cap when it is attached to and disconnected from the spray gun. For example, if the cap is screwed to the reservoir, the thread should be so designed that it would require more than one complete rotation of the reservoir relative to the cap to completely disconnect it. In addition, the threads on the cap and reservoir may have an opposite direction so that the cap is unscrewed from the reservoir by rotation in the direction opposite to that in which it must be rotated to disconnect from the spray gun.

The lid design may include a filter to remove unwanted solid particles contained in the liquid in the tank. For example, the filter may be located in the mouthpiece channel. Another option for the location of the filter is to install it at the base of the spray receptacle opposite the mouthpiece entrance. In this case, the liquid can be added to the tank through the hole in it without first filtering the solid particles contained in it. In addition, if the filter becomes clogged, the cover can be replaced.

Another option is to pre-filter the liquid to separate solid particles so that there is no need to filter the liquid coming from the tank into the atomizer. In this case, you do not need to install a filter in the tank lid.

The tank can be delivered empty so that it is subsequently filled by the user and attached to the spray gun using a cap. If the tank is compressible, it can be compressed to a size and shape suitable for storage and transportation.

Another option for the delivery of the tank is delivery in a pre-filled state, and the hole in the end wall can be sealed with a removable plug, which is removed before using the tank and the liquid in it. For example, the opening may be closed by a removable plug or a tearable membrane that ruptures when the lid is attached to the reservoir. In another design of the reservoir, the lid may be adapted to cover the opening until the reservoir and the liquid contained therein are used. For example, the lid may be provided with a removable plug located at the base of the receiving sleeve and closing the channel in the mouthpiece. Another option for sealing the tank is a tearable membrane at the end of the mouthpiece, which ruptures when the mouthpiece is attached to the spray gun.

Pre-filling in the tank can be used for those liquids that cannot be packaged and stored until they are used without deterioration. Accordingly, pre-filling into the tank can be especially useful for those liquids that can be supplied ready-to-use (for example, if they are not required to be modified to match the color with some predefined color). For example, standard paints of a certain color to create a base coat, and / or primer, or varnishes, which can be supplied in an inactive form and can be (if necessary) activated by appropriate means, such as exposure to light (ultraviolet radiation), electricity, etc. P. Whatever type of liquid and method of its activation is used, the reservoir can be refilled during its use by disconnecting from the cap, adding fluid to it through the hole and reconnecting to the cap.

The preferred design of the lid is one in which the lid has a base and a mouthpiece and is removably attached to the tank using threads corresponding to each other on the base of the lid and around the perimeter of the end wall of the tank around the hole in it, and the mouthpiece moves away from the base of the lid away from the tank and is equipped with a channel for the exit of fluid, and the channel has a cross-sectional area smaller than the area of the hole in the end wall of the tank.

Preferably, the reservoir is compressible and contracts as the fluid escapes from it. For example, the end wall may be rigid compared to the side wall. Thus, the end wall will ensure the stability of the tank and allow the operator to hold it without changing its shape when it is attached to and disconnected from the cover, and the side wall will be axially compressed towards the end wall as the fluid is withdrawn from reservoir in the process of its use.

One of the structures provides a cover provided with an adapter sleeve with an internal thread corresponding to an external thread on a sleeve located around an opening in the end wall. In another design, the side edge of the hole is provided with an internal thread corresponding to the external thread on the cover.

Another preferred design is that the hole in the end wall of the tank is larger than that required to provide the required flow when the tank is connected to the sprayer during operation, while the liquid outlet in the mouthpiece has a transverse area sections smaller than the area of the hole in the end wall of the tank, and the aforementioned hole allows for quick refueling of the tank by disconnecting the lid and pouring liquid ty into the tank through the aforementioned hole.

Since the reservoir is provided with a large area opening in the end wall, it can be easily and quickly filled with liquid, and the risk of spillage is reduced.

Below the invention will be described in more detail by considering a specific example, with reference to the relevant drawings.

Brief Description of the Drawings

Figure 1 is a perspective image of a prototype of a spray gun.

Figure 2 is an exploded isometric view of the paint tank of Figure 1.

Figure 3 is a perspective view of the assembled paint tank of Figure 2.

Figure 4 is a longitudinal section of the paint tank shown in figure 3.

FIG. 5 shows the detachment of parts of the paint tank of FIG. 3 after use.

6 is a perspective view of a connecting device for attaching a paint tank to a spray gun.

Fig.7 is a longitudinal section of the connecting device shown in Fig.6.

Fig. 8 is an exploded isometric view in which, as in Fig. 2, components of a paint reservoir according to a first embodiment of the invention are shown.

Fig.9 is a perspective view similar to Fig.3, showing the Assembly of the paint tank shown in Fig.8.

Figure 10 is a longitudinal section of the paint tank shown in figure 9.

11 is a perspective view of the cap used with the tank shown in Fig.8-10.

Fig. 12 is a longitudinal section through the cap of Fig. 11 attached to the reservoir of Figs.

13 is a perspective view of a reservoir and a cap according to a second embodiment of the present invention.

Fig. 14 is a perspective view of another embodiment of a cap used with the reservoir of Figs. 8-10 and Fig. 13.

FIG. 15 is a diagram of another embodiment of a connecting device used with the cap shown in FIG. 14 for attaching a reservoir to a spray gun.

Fig.16 is a longitudinal section similar to that shown in Fig.12, showing another variant of the connection of the lid and the tank.

Fig.17 is a longitudinal section similar to that shown in Fig.12 and showing another variant of the connection of the lid and the tank.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Figure 1 illustrates a prototype of a spray gun 1 with a gravity-fed fluid described in our parallel Patent Application No. WO 98/32539, excerpts of which are incorporated herein by reference.

The spray gun 1 includes a housing 2, a handle 3 extending downward from the rear of the housing, and a spray nozzle 4 in the front of the housing. Manual control of the spray gun 1 is carried out using the trigger 5 mounted on hinges located on the sides of the spray gun.

The ink tank 6, which contains paint (or similar material), is located in the upper part of the housing 2 and communicates with the spray gun through an internal channel (which is not visible in this drawing) passing through the spray gun body to the nozzle 4.

In the process of applying the spray gun 1 through the adapter 7, located in the lower part of the handle 3, is connected to a source of compressed air (not shown in this drawing). Thus, when the operator pulls the trigger 5, the compressed air enters through the body of the spray gun to the nozzle 4. As a result, the liquid that flows by gravity from the container 6 to the nozzle 4, when exiting the nozzle 4, is divided into small particles and under the influence of compressed air, coming out of the nozzle 4, forms an aerosol (spray).

Figure 2-4: the container for the paint 6 includes an external container 8, a disposable liner 9, a disposable cap 10 and a ring washer nut 11. The shape of the liner 9 corresponds to the shape of the inside of the container 8 (exactly matches it), and the liner is equipped with a narrow rim 12 around its open part, which is mounted on the upper edge of the container 8. The cap 10 around the perimeter is equipped with a bead 13, which fits tightly on the open end of the liner 9, as well as a central hole 14, from which the mouthpiece 15 forms a channel for the discharge of fluid. The free end of the mouthpiece 15 is provided with external protrusions 16, which form one part of the engagement elements. The hole 14 at the inner end of the mouthpiece 15 is blocked by a mesh filter 17, which can be tightly inserted into the rim 13, or is integral with the cap 10. Another option: the filter can be tightly inserted into the mouthpiece 15.

The cap 10 is firmly attached to the container 8 with a cap washer-nut 11 with an opening screwed onto the container 8 over the cap 10. In the assembled state, the liner 9 and the cap 10 form a reservoir containing paint or other liquid that will be sprayed through the nozzle 4 onto which she will enter through mouthpiece 15.

The paint container 6 is connected to the spray gun 1 by means of a connecting device 18, which is presented separately from the paint tank in FIGS. 6 and 7. The connecting device 18 is a tubular part, the inside of which is formed at one end by a receiving sleeve 19, on which is the reciprocal part of the engagement elements that serve to attach the mouthpiece 15, extending from the cap 10. From the other end 20, the connecting device 18 has a shape that allows for standard connection of the container of paint to the spray gun (usually a threaded connection).

The container 8 of the container for the paint 6 is made of a plastic material, such as polyethylene or propylene, and can be transparent (as shown in figure 2) or opaque and have any convenient volume. When working with a spray gun, the typical capacity of containers 8 may be 250 ml, 500 ml or 800 ml, although other container sizes may be required.

In this embodiment of the invention, the container 8 is usually in the form of a cylinder closed at one end 8A. The other end of the container is open, and the side wall 8B is provided with an external thread 8C. The bottom-base 8A is flat so that the container can stand on it without extraneous support, and is provided with a central air inlet 8D. The inner part of the side wall 8B has a slight conical taper in the direction from the open end to the bottom-base 8A.

The insert 9 is preferably transparent and is made by hot molding from a single piece of plastic material, preferably polyethylene or polypropylene. The shape of the insert 8 is determined by the need to precisely match the shape of the inside of the container 8. The insert 9, similarly to the inside of the container 8, has a generally cylindrical shape, a closed end 9A and a side wall 9B that has a slight conical taper from the open end to the closed end 9A.

The bottom-base or, otherwise, the closed end 9A is relatively rigid, while the side walls are flexible and can be made compressible. Nevertheless, the liner 9 is able to stand without support on the bottom-base 9A, and the side walls of the liner will be vertical, as shown in Fig.2-4.

When the liner 9 is compressed, the relatively rigid bottom-base 9A retains its shape, but moves toward the rim 12 due to the compression of the side walls 9B, as shown in FIG. 5. The side walls 9B are compressed in a similar manner to the state of the plastic bag, and they do not rupture (for example, by splitting, wear or cracking).

The cap 10 is also made from a single piece of plastic material, such as polyethylene or polypropylene, and can be made using injection molding technology. The cap 10 may be transparent or opaque or be dyed in a specific color. The union washer-nut 11 is a molded plastic part or it can be made of metal (for example, aluminum) by machining the workpiece on a machine. The connecting device 18 may be made of metal or plastic and may, for example, be molded from aluminum and then anodized or clad.

In order to be able to use the container for the paint 6, the connecting device 18 is installed on the end 20 of the spray gun and remains in this position. Then, the paint container 6 is disassembled, as shown in FIG. 2, and the insert 9 is inserted into the container 8. Then, paint is poured into the insert 9, which, if necessary, is mixed with the corresponding pigments, hardeners and diluents. Then the cap 10 is installed in its place in the upper part of the liner, after which a cap washer-nut is put on top of it, which is tightly screwed on and thus tightly presses the cap 10.

The upper part of the liner 9 is thus sandwiched between the rim 13 of the cap 10 and the side wall 8B of the container 8, while the rim 12 of the liner 9 is sandwiched between the upper edge of the container 8 and the union washer-nut 11, as shown in Fig. 4.

After that, the spray gun is turned to the position opposite to its normal working position shown in figure 1, so that the end of the mouthpiece 15 can be inserted into the connecting device 18, after which the spray gun is again brought into its normal working position for it application in the usual manner.

As the ink exits the liner 9 during operation, the side walls of the liner 9 are compressed due to a decrease in pressure inside the liner 9. The bottom-base 9A of the liner 9 retains its shape due to its greater rigidity, as a result of which the liner 9 is compressed in the longitudinal rather than transverse direction , which reduces the likelihood of the formation of isolated "pockets" with paint inside the liner 9.

The operator, if he wants, can release air from the liner 9 before starting work with the spray gun 1, although this condition is not necessary. However, such an air outlet increases the range of angles at which the spray gun will function satisfactorily, since this will prevent the possibility of air entering the spray gun 1 from the paint tank 6. To release air from the inside of the liner 9, you must pull the trigger 5 of the spray gun 1 when the spray gun 1 is upside down.

To rinse the spray gun 1 after operation, it can again be turned back to the position opposite to the worker shown in figure 1, disconnect the compressed air supply line, pull the trigger 5 and hold it pressed for some time, which will allow the paint inside the spray gun to drain back into the liner 9 in the container 6. After that, the container 6 is disconnected from the spray gun 1 by removing the mouthpiece 15 from the connecting device 18, which remains attached to the spray gun 1.

The union washer-nut 11 is removed from the container 8, after which the cap 10 is removed, taking with it the compressed sleeve 9, as shown in Fig.5. The cap 10 (including filter 17) and the liner 9 are then disposed of, and the container 8 and the union washer-nut remain clean and suitable for further use in combination with the new liner 9 and cap 10. In this case, it remains only necessary to flush the spray gun itself, which ultimately leads to a significant reduction in the amount of solvent required for such washing.

This significantly reduces the risk of spills of unused paint from the container 6, since the liner 9 is removed and disposed of in a compressed form and with a cap 10 put on it. In addition, since the liner is disposed of in a compressed state, the amount required to collect used liners 9 is minimized.

As is clear from the previous description, the design, consisting of a disposable liner 9 and a cap 10, forming a reservoir with paint or other liquid intended for spraying, significantly reduces the amount of flushing required when replacing the liquid with a new one or after completion of work.

In this case, it may happen that for painting a certain area there will not be enough paint contained in one tank. In this case, the operator must remove the container 6 from the spray gun 1, unscrew the union washer-nut 11 and remove the cap 10 in order to open the tank for filling with paint. After that, cap 10 must be put back on the open end of liner 9, screw on the union washer-nut 11, attach the container 6 to the spray gun 1 and continue to work. However, this operation is time consuming and associated with the risk of paint spilling or contamination if the cap 10 is removed.

Some users may try to fill the tank with paint through the channel in the mouthpiece 15, however, this takes even longer and the risk of spilling the paint increases due to the small diameter of the mouthpiece 15 and the presence of a filter 17. In addition, all the solid particles deposited on the filter 17 when refueling the paints through the mouthpiece 15 remain on the outside of the filter 17 after reconnecting the reservoir to the spray gun 1. As a result, these particles are entrained in the liquid as it passes into the spray gun 1, which may lead to it littering or poor-quality painting, which will have to be repeated.

To overcome these difficulties, some users prefill two or more tanks with the same liquid, which can then be used sequentially when painting a large area. At the same time, however, the assembly and refueling of several tanks requires considerable time and significantly increases the cost of work. In addition, to fill several tanks with the same liquid, it is necessary that the operator have at his disposal a sufficient number of parts, namely tanks and union washers. For this reason, for this task it is more advisable to have one tank, which can be equipped with several disposable liners and caps that are disposed of after use.

On Fig-12 presents the first implementation of the present invention, which allows the operator to add paint to the tank without disassembling it. The details of the device in these drawings are indicated by the same numbers as in FIGS. 1-7, but with the addition of the number 100 to each number, which is done to indicate the correspondence between similar parts shown in different drawings. Therefore, the design and operation of similar parts of the device should be understood from the previous description and will no longer be described in detail.

As shown in the drawing, the ink tank 106 includes an external container 108, a disposable liner 109, a disposable cap 110, a union washer-nut 111, which are assembled in the same way as in the previous embodiment of the invention. According to the present invention, the cap 110 has a central opening 130 defined by the outer cylindrical sleeve 131 and a separate cover 132 for attaching the container 106 to the spray gun (not shown in the drawing). The central location of the hole 130 allows you to increase its size to the desired size.

The cover 132 includes a base 133 provided with a sleeve 134 with an internal thread 135, a mating external thread 136 on the sleeve 131, for removably sealing the connection of the cover 132 to the cap 110. It is understood that additional sealing means may be used to ensure the tightness. For example, an o-ring (not shown) may be worn on the outer end of the sleeve 131 inside the cover 132.

The cap 132 is also provided with a mouthpiece 115 protruding from the base 133 and having a fluid outlet channel connected to the inlet channel of the spray gun 101 via an inlet connector (not shown) that is removably attached to the spray gun. In this implementation, the cover 132 is removably attached to the input connector using the engagement elements 116 on the mouthpiece 115 and their corresponding engagement elements (not shown) on the input connector.

For coupling / uncoupling engagement elements and, accordingly, connecting / disconnecting the tank, less than one full revolution of the lid 132 is required with respect to the input connector, while connecting / disconnecting the threaded connections of the lid 132 and the sleeve 131 requires more than one full revolution of the lid 132 in relation to the tank. Thus, when attaching the cap 132 to the spray gun or disconnecting from it, accidental or unintentional disconnection of the tank from the cap 132 is excluded.

As can be seen in figures 10 and 12, the inner diameter of the mouthpiece 115 is much smaller than the diameter of the Central hole 130 in the cap 110 of the tank. For example, in this embodiment of the invention, the inner diameter of the mouthpiece is 10-15 mm (approximately 1/2 "), while the inner diameter of the central hole is 53 mm (approximately 2"). The mouthpiece 115 is on the same axis as the central hole 130, so that the tank, after it is attached to the spray gun, is aligned with the central longitudinal axis of the spray gun. As a result, the weight of the tank and the liquid inside it are evenly distributed, which eliminates the adverse effects on the balance of the spray gun.

The Central hole 130 has a size larger than what is required to ensure the necessary flow when the tank is connected to the spray gun. This size of the hole 130 allows you to quickly fill the tank with liquid through the hole 130 when the tank 106 is disconnected from the cover 132. As a result, if you need to refill the tank during operation, the tank 106 can be disconnected from the cover 132 by loosening the threaded connection between the sleeve 131 and the cover 132 , which opens access to the hole 130. After that, you can add fluid to the tank through the hole 130 and reconnect the lid 132 to the spray gun 101.

Thus, it is possible to quickly fill the tank by freely pouring liquid into it through the central opening 130 of an enlarged size. In this way, filling the liquid into the tank can be relatively easy and without disassembling the container 106, and the risk of spilling or contamination of the liquid is reduced. It should be noted that the Central hole 130 can be used both for refueling the tank during operation, and for the initial refueling of the tank before starting work.

In addition, through the opening 130, a tool can be introduced into the tank to mix the contents of the tank, which allows the contents of the tank to be mixed after assembly of the container 106, i.e. attaching cap 110 to liner 109. Thus, the risk of spillage is reduced.

A filter (not shown) may be installed in lid 132 to remove contaminants and particulate matter. This filter can be installed, for example, in the mouthpiece 115 or in the sleeve 134 so that it overlaps the inner end of the mouthpiece when the cap 110 is connected to the cover 132. Thus, if the filter becomes clogged during operation, the cover 132 can be replaced.

Another installation location for the removable filter (not shown) when filling liquid into the tank may be a central opening 130. This filter can be of any type, and it is preferable that it has a large surface area so as not to limit the rate of filling liquid into the tank. Thus, installing the filter in the cap 132 may reduce the risk of interruption or decrease in fluid flow to the spray gun due to clogging of the filter during operation.

13 illustrates a second implementation of the present invention. To designate parts similar to parts of previous implementations, similar numbers are used, only starting with 200. The design and operation of similar parts were explained in the description of previous implementations of the invention, therefore, in this case they are not described in detail.

In a second embodiment of the invention, liner 209 and cap 210 are inextricably connected. For example, liner 209 and cap 210 may be made from a single piece using blasting. Another method of joining individually molded liner 209 and cap 210 may be welding, adhesive bonding, or some other type of permanent joint.

The tank formed by the one-piece liner 209 and the cap 210 can be used without an external container and a union washer-nut, provided for by the previous embodiments of the invention. Another way to use such a reservoir is to use it together with a support structure for the liner 209, which protects the liner 209 and is stable when liquid is added to the reservoir or when the reservoir is connected to a spray gun (not shown). The supporting structure (not shown) may include an external container and a flange nut, as previously described. In another design of the cap 210, it may be provided with an external flange (not shown) or a similar element on which a support sleeve or cage surrounding the liner 209 can be detachably mounted.

The tank can be delivered empty so that the user can fill it through the central hole 230 in the cap 210 before connecting the tank to the spray gun. Alternatively, the reservoir may be supplied already filled with liquid, the central opening 230 in the cap 210 being sealed with a removable plug (not shown), like a cap on a thread 238, or a tearable membrane, such as a strip of foil. The rupture disc breaks when the cap 232 is attached to the reservoir.

Tank pre-filling can be convenient in the case of liquids that cannot be stored without deteriorating in their quality, and / or those liquids for which it is unimportant to maintain accurate colors such as primers and clear coatings. In addition, any unused liquid after disconnecting the tank from the spray gun can be stored temporarily, for which the hole 230 in the cap 210 is again sealed with a screw cap 238 (if there is such a plug) or any other suitable plug. This liquid can be used subsequently, for which the tank is again attached to the spray gun. Such operations are conveniently carried out with liquids that do not dry out and do not harden for a relatively short period of time after their first use. Prior to sealing the tank with a screw plug 238, it may be compressed to remove air from it. Thus, the service life of the stored fluid can be increased.

Figs. 14 and 15 illustrate another embodiment of the cap and attachment device that are used with the tank of the present invention. To designate parts similar to parts of previous implementations, similar numbers are used, starting in this case with 300. The design and operation of similar parts were explained in the description of previous implementations of the invention, therefore, they are not described in detail now.

In a third embodiment of the invention, a cap 332 for connecting a reservoir (not shown) to a spray gun (not shown) is provided with a detachable adapter separate from the mouthpiece 315. The adapter includes a pair of hook elements 339 and 340 located on opposite sides at a distance from the mouthpiece 315. The hook-shaped elements 339 and 340 are the same and are provided with enlarged heads 341 and 342 having a rounded front portion 341a and 342a ending on a rib with a notch 341b and 342b.

The inlet adapter on the spray gun has an external flange 343 at the outer end for engaging with hook members 338 and 339, which serve to detach the reservoir to the spray gun using the mouthpiece 315 included in the sleeve 319. In this embodiment, the mouthpiece 315 is provided with external annular ribs 344, which provide a fluid tight connection to the sleeve 319. It is understood that any sealing means, such as one or more o-rings inserted into the sleeve 319 and / or put on the mouthpiece 315, can be used to ensure tightness.

As shown in FIG. 15, the flange 343 has arcuate grooves 345, 346, 347 and 348 that are evenly distributed around the circumference around the outer edge so that the grooves 345 and 347 are opposite each other and the grooves 346 and 348 are also opposite friend.

Each of the grooves 345, 346, 347 and 348 leads in a clockwise direction (as can be seen in FIG. 15) using the protrusions 345a, 346a, 347a and 348a at the ends of the grooves 345, 346, 347 and 348 to the cap 349, 350 , 351 and 352 ending in a stop 349a, 350a, 351a and 352a.

To attach the cover 332 to the input adapter 318, the hook elements 338 and 339 are mounted in line with a pair of opposing grooves 345 and 347 or 346 and 348 on the flange 343. After that, the mouthpiece 315 is inserted into the sleeve 319 so that the enlarged heads 341 and 342 on the distal ends of the hook-shaped elements 338 and 339 pass through the grooves 345 and 347 or 346 and 348, which are installed in line with the hook-shaped elements.

Then, the lid rotates with respect to the input adapter 318, as a result of which the hook-shaped elements 338 and 339 are put on the protrusions 345a and 347a or 346a and 348a, and the clamping ribs 341b and 342b extend beyond the caps 349 and 351 or 350 and 352. Thus, the lid 332 attaches to the input adapter 318, and it is not possible to detach the cover 332 from the input adapter only by axial movement. Cover 332 may be disconnected from input adapter 318 by performing the above operations in reverse order.

As shown in FIG. 14, the cap 332 can be attached to the reservoir using an internal thread 335 on a sleeve at the base of the cap 332 corresponding to an external thread 335 on a sleeve 331 surrounding a central opening 330 in the cap 310 of the reservoir. The cap 310 and the insert 309 may be detachably connected, as shown in FIGS. 8-12, or one-piece, as shown in FIG. 13.

Figures 16 and 17 illustrate two alternative detachable attachments of the cap to the reservoir. To designate parts similar to parts of previous implementations, similar numbers are used, starting in this case with 400 and 500. The design and operation of similar parts were explained in the description of previous implementations of the invention, therefore, they are not described in detail now.

As shown in FIG. 16, the opening 430 in the cap 410 is provided with an internal thread 450, and the base of the cap 432 has a sleeve 451 with an external thread 452 corresponding to a thread 450, which threads are used to detach the cap to the reservoir.

On Fig shows that the cap 510 and the cover 532 are provided with mutually complementary formations that are mutually engaged and serve to create a detachable connection around the hole 530. In this implementation, the said mutually complementary formations include an outer rib 560 on the sleeve 531 and an internal groove 561 on coupling 534. Here, it is understood that any suitable mutually complementary formations can be applied to create such a detachable connection.

Obviously, other devices can be used to create a detachable connection between the lid and the reservoir.

Thus, it is understood that the present invention relates to a fluid supply device used with a spray gun and comprising a reservoir having an enlarged central hole for quickly filling the reservoir, as well as a separate lid that can be connected to the reservoir using a mouthpiece, equipped with a channel for the exit of fluid and used to connect to the spray gun. Thus, the tank can be disconnected from the lid, which makes it easy to add liquid to it through the central hole, and the risk of spillage is significantly reduced. In addition, the central location of the hole at the end of the tank allows you to maximize the size of this hole. In addition, since the outlet channel of the lid is located on the same axis as the aperture, the reservoir is aligned with the longitudinal axis of the spray gun, which eliminates the imbalance of the spray gun and the associated inconvenience when using it.

The implementation examples of the present invention described in this application are intended to explain the limits of variation and application of the present invention. Individual parts and elements of each of the implementations can be used both independently and in combination with any parts and elements of the same or other implementations.

In addition, while individual implementations of the present invention described and illustrated in this application are the best means that are currently known to the applicant, it is understood that the present invention is not limited only to them and various modifications are possible within the following claims. and improvements.

Claims (11)

1. A device for supplying liquid, made with attachment to the spray gun and including a reservoir (106) for the sprayed liquid, which reservoir (106, 109, 209) has a first end, a second end (108A, 109A) located at some distance from the first end, and the end wall at the first end, as well as the side wall (108B, 109B) located between the end wall and the second end (108A, 109A), and the end wall has a mouthpiece (115, 215, 315, 415, 515), equipped with a channel for the exit of fluid and communicating with the reservoir (106, 109, 209), and the mouthpiece (115) m can be connected to the spray gun to connect the reservoir (106, 109, 209) to the fluid inlet on the spray gun, while the device has a cover (132, 232, 332, 432, 532), which is equipped with a mouthpiece (115, 215, 315, 415, 515), and the lid is removably attached to the reservoir (106, 109, 209) around the hole (130, 230, 430, 530) in the end wall, with the side edge of the hole (130, 230, 430, 530) inside in relation to the side wall (108B, 109B), while the hole (130, 230, 430, 530) in the end wall has a size larger than the mouthpiece (115, 215, 315, 415, 515), the tank (106, 109, 209) can be disconnected from the cover (132, 232, 332, 432, 532) to add fluid to the tank (106, 109, 209) through the hole (130, 230, 430, 530) in the end wall. 2. The device according to claim 1, characterized in that the reservoir (109, 209) is compressed as the fluid exits from it. 3. The device according to claim 1, characterized in that the side wall (109 V) is flexible in comparison with the end wall, so that it is able to deform to compress the tank (109) in the axial direction from the end wall to the first end. 4. The device according to claim 1, characterized in that the reservoir (109, 209) is provided with a relatively rigid base (109A) at the second end, so that the reservoir can be turned over and placed on the base (109A) to add fluid to it through the hole ( 130, 230, 430, 530) in the end wall. 5. The device according to claim 1, characterized in that the cover (132, 232, 332, 432) is screwed onto the tank. 6. The device according to claim 1, characterized in that the lid (532) is attached to the tank with latches. 7. The device according to claim 6, characterized in that the cover (132, 232, 332, 432) includes a base forming a sleeve (134, 234) equipped with an internal thread (135, 235, 335), a mating external thread on the sleeve ( 131, 231) bounding the opening (130, 230) in the tank. 8. The device according to claim 6, characterized in that the hole (430) in the tank is provided with an internal thread (450), and the lid (432) has a base provided with a section with an external thread (451) corresponding to the aforementioned internal thread (450). 9. The device according to claim 1, characterized in that the cap (132, 232, 332, 432, 532) is removably attached to the spray device. 10. The device according to claim 1, characterized in that the cover (132, 232, 332, 432, 532) and the spray device are equipped with interacting engagement elements (116, 216, 416, 516). 11. The device according to claim 1, characterized in that the cover (132, 232, 332, 432, 532) includes a filter to remove unwanted solid particles present in the liquid discharged from the tank.

Images