CZ20021931A3 - Hand-held sprinkler - Google Patents

Abstract

A hand holdable pump spray apparatus is disclosed where the pump mechanism is in the hand holdable wand (14) rather than in a spaced apart liquid container. The wand (14) may be held with one handle (54) is extended with other hand. This creates a pressure differential which allows liquid to flow from the container (10), passed a check valve (84) and into the wand (14). After filling, a biased spring provides a force against the liquid creating a higher pressure in the wand (14) than ambient pressure. This closes the check valve (84). When an operator depresses an actuator (68), another valve (88) opens allowing the liquid in the wand (14) to be ejected through a nozzle (66).

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a hand pump sprayer, and more particularly to a hand pump pump sprayer that is reliable, easy to use, safe and inexpensive.

State of the art

Sprayers or sprayers without an aerosolized pressure cartridge have been developed primarily to eliminate the use of propellants that have an adverse effect on the environment and also pose a risk of use due to their pressure cartridge. These pressure vessels can explode and cause injury, and if they contain insecticide, herbicide or fertilizer filling, they can still have an adverse effect on the environment. Examples of such devices without pressurized aerosol cartridges are described in US Patent Nos. 5,938,116, 5,918,782, 5,860,574, 5,810,211 and 4,174,055.

A disadvantage of all such devices without a pressurized aerosol filling is that the pump is located in the container from which the liquid is pumped. The flexible tubing then connects the container to the hand sprayer, respectively. hand applicator. Typically, the container is sold as a disposable handling unit intended for disposal after use. This results in high production costs as well as high costs for the consumer, since the pump and / or the pump are disposed of together with the container. the pump unit contained therein. Another problem is the necessity to put the hand applicator down or keep it awkward when pressurized by the hand pump, since two hands are required for handling. If the sprayer needs to be pressurized, it must be pumped. This means that the handle connected to the piston must be pulled upwards with one hand, holding the container with the other hand or holding the container. push them down. If a hand-held applicator is still to be held, this is very difficult.

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The safety aspect with respect to the liquid to be sprayed must also be taken into account. The manufacturer must ensure that the liquid container is prevented from being accidentally opened during transport, and the consumer must also ensure, after use, that the liquid pressurized into the hose is either emptied or prevented from being accidentally emptied.

Numerous attempts have been made to improve the prior art sprayer without a pressurized aerosol cartridge, but the optimum arrangement has not yet been made.

SUMMARY OF THE INVENTION

The present invention overcomes the drawbacks and disadvantages of prior art devices. Provides a pump hand sprayer comprising a tubular two-piece tubular housing disposed outside of the liquid container to be sprayed, a piston arranged movably within the housing, a handle coupled to the piston and arranged to be gripped by the user to move the piston towards one end of the housing; and an end of the housing for applying pressure to the piston towards the second end of the housing, a chamber formed in the housing between the piston and the housing end, a first valve positioned between the vessel and the chamber, a nozzle, a second valve positioned between the nozzle and the first valve; from the chamber through the nozzle.

The new inventive device, i.e. the hand sprayer according to the invention, brings a number of advantages, advantages and new features that the prior art handheld device does not have. For example, one advantage is that the inventive hand sprayer has a pump located in the hand applicator, thereby eliminating the risk of pressure fluid in the tubing between the container and the applicator. Another advantage is that the new device eliminates many of the necessary components. A further advantage of the present invention is the fact that the device in combination with a hand spray applicator and a container is relatively inexpensive and the container is available after use as well as an applicator that can be reused. Another advantageous feature is that a visual inspection of the sealed container is provided prior to use or during storage or transport so that leakage of potentially or actually hazardous

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- J of liquids. The present invention further allows the container to be emptied prior to mounting the applicator thereto. The handheld applicator itself is reliable, easy to use, inexpensive and safe.

The invention will be better understood, including its advantages and features, by describing its preferred possible embodiments using the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 is an overall front view of the hand sprayer of the present invention.

Fig. 2 is an enlarged elevational view, partially in section, showing the hand sprayer during storage or transportation, and also showing the container safety valve in the closed position shown in solid lines and in the open position shown in dashed lines.

Fig. 3 is a sectional view taken along line 3-3 of Fig. 2, but without the hand sprayer.

Fig. 4 is an enlarged cross-sectional view of one variant of a container closure with a rotary valve in the closed position.

Figure 5 shows the closure of Figure 4 with the valve in the open position and connected to the tube.

Fig. 6 is an enlarged front elevational view of one embodiment of the hand sprayer.

Figure 7 is a side view of the embodiment of the hand sprayer of Figure 6.

Fig. 8 is a plan view of the hand-held sprayer of Figs. 6 and 7.

Figure 9 is a partial cross-sectional view of Figure 9-9 of Figure 8.

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-4Fig. 10 is an enlarged cut-out of the circle of FIGS. 10-10 of FIG. 6 showing the spray valve in the closed position.

Giant. 11 is a partial view of the valve of FIG. 10 in the open position.

Giant. 12 is an enlarged cross-sectional view taken along line 12-12 of FIG. 10.

Giant. 13 is an enlarged cross-sectional view of the circle of FIGS. 13-13 of FIG.

Giant. 14 is a cross-sectional view according to FIGS. 14-14 of FIG. 13 when the handle is engaged.

Giant. 15 is a view of the handle shown in FIG. 14 in a relaxed position.

Giant. 16 is a partially schematic front view of another variation of the inventive embodiment with the housing portion removed to allow an inward view.

Giant. 17 is an enlarged front elevational view of the variant of FIG. 16.

Giant. 18 is a cross-sectional view of the variant of FIG. 16 when filling a hand sprayer.

Giant. 19 is a cross-sectional view of another inventive embodiment illustrated in FIGS. 16 to 18, but using a pulley to reduce the force required to fill the hand sprayer.

Fig. 20 is a front elevational view of the embodiment of Fig. 19 with the handle extended.

21 is an elevational view of another embodiment of the sprayer of the present invention.

Fig. 22 is a perspective view of another embodiment of a sprinkler assembly of the invention.

Fig. 23 is a perspective overall view of an embodiment of a sprayer according to the invention with a pump attached to the top of the container.

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Examples of embodiments of the invention

While the present invention may be practiced in various modifications and alternative constructions, the embodiments shown in the drawings are cited and described as preferred. It goes without saying that they are not intended to limit the invention to these particular embodiments. On the contrary, it is intended to protect all possible modifications, variations, equivalent structures and methods, as well as alternative constructions within the scope and spirit of the invention as described in the appended claims.

Referring now to Fig. 1, it is now noted that the aerosol-free hand sprayer of the present invention comprises a container 10 functioning as a fluid supply to which is connected a supply line 12 connected to the hand pump sprayer 14 with a pump. As already mentioned, there are a number of advantages for a pump placed directly in the sprayer than in the container, as has been the case so far. Placing the pump in the hand sprayer 14 makes it much easier to use. In fact, it is not necessary to release the hand-held sprayer 14 from the hand or to hold it in an inappropriate position when pumping by a pump. The user can hold the hand sprayer 14 with one hand and manipulate the pump piston with the other hand, as discussed below. In this operation, there is no need to hold the vessel 10 down or apply pressure thereto. The second big advantage is the reduction of production costs. This is due to two causes. The first is that the placement of the pump in the hand sprayer 14 simplifies the overall construction and the number of components needed. The second is that the pumpless container 10 is much cheaper to manufacture.

A further advantage relates to the handling of the liquid in relation to the container 10. Since physical contact with the liquid in the container 10 is not desirable and virtually always a small amount of liquid remains in the container after use, the empty container 10 must be replaced with a full one. It is therefore very advantageous that the pump is located in the hand sprayer 14 outside the container 10 and by simply replacing the empty container 10, which by means of a simple valve can be easily sealed, a new full container achieves the desired effect.

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2 and 3, the container 10 will now be described in more detail. This may be made, for example, of any suitable synthetic resin, such as high density polyethylene, by blow molding techniques to ensure that the container 10 is provided with an integral holder 20, a nozzle 22, and a storage plug-in sleeve 24 for the hand sprayer 14 It also has a special safety shutter 26 which is provided with a rotary valve 28. This allows easy visual inspection of its closed or open state. The rotary valve 28 is connected to the top of the safety closure 26 attached, for example by screwing, to the nozzle 22 of the container 10. The rotary valve 28 is provided with a central outlet 30 forming a passage from the first end 32 of the rotary valve 28 towards its opposite second end 34 connected to supply line 12,

As said, the rotary valve 28 is arranged on the safety closure 26. The first end 32 is rotatable from the horizontal position shown in solid lines in Fig. 2 to the vertical position of the rotary valve 28 shown in dotted lines. In this, the central outlet 30 is aligned with the inner outlet tube 36 in the container 10, extending almost to the bottom 39. This establishes a direct connection between the liquid 38 in the container 10 and the hand sprayer 14 that guides the inner tube 36, However, it is clear that when the rotary valve 28 is horizontal, the passage between the inner tube 36 and the inlet tube 12 is closed. Thus, the liquid inside the container 10 is tightly closed. The rotary valve 28 is safe, relatively inexpensive, and allows the operator to visually check for opening or closing.

A further advantage is that, after the container 10 has been emptied, it can be disposed of as desired, even with the inner tube 36 and the safety cap 26, with the remainder of the liquid therein. These components for disposal are simple and relatively inexpensive, while more expensive components such as is a hand-held sprayer, preferably reusable.

The insertion sleeve 24 allows the hand sprayer 14 to be stored for transport and storage. An integral connecting bridge 40 (see FIG. 3) is formed between it and the vessel 10, around which a supply line 12 in the form of a hose leading to the hand spraying device 14 can be wrapped around it during storage. for »* · • *

-7The conditions of transport and storage very compactly arranged in a state without pressure in it. This feature further reduces overall costs and increases safety.

4 and 5, there is shown one embodiment of the screw cap 21 and the valve on the container. The lid 21 is provided with an internal thread 23 for engaging an external thread (not shown) on the spout of the container 10, not shown in this figure. The lid 21 is provided with a sleeve 25 for receiving the upper end 27 of the inner tube 36. Outside there is a cut-out 29 on the lid, to which the rotatable valve element 31 is rotatably mounted. It has a tubular shape and has a central passage 33 for the connector 35 attached to the supply The connection connector 31 is connected to the central passage 31 as shown in FIG. The rotatable valve element 31 comprises an end opening 31 leading to the central passage 31. The rotatable valve element 31 is rotatably mounted on the horizontal pin bearing 43. The cap 21 is further provided with a venting hole 47 (FIG. 5), a tightly overlapped rotatable rotary valve element 31; the liquid outlet port 41 into the central passage 33 of the rotatable valve element 31

Similar to the rotary valve 28 of Fig. 2, the rotary valve element 31 of Figs. 4 and 5 is closed in the horizontal position and opened in the vertical position. In the horizontal closed position, both the vent port 47 and the liquid outlet port 41 are closed by overlapping the body of the rotary valve element 31, thereby sealing the vessel 10 and the liquid therein (not shown in FIGS. 4 and 5). This is yet another advantageous safety feature of the inventive embodiment, since, as will be explained below, the liquid from the hand sprayer 14 and the supply line 12 has previously returned to the container.

In the spraying operation, the rotatable valve element 31 is rotated upwardly to a vertical position around the horizontal pin bearing 43 and the connector 35 with the inlet tube 12 is inserted into the central passageway 33. This provides a free passage from the container 10 through the inner tube 36 through the outlet. 41 into the central passage 33 and further through the connector 35 to the supply line 12.

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* ··· • 4 • ·· 44

444

6 to 9, a hand sprayer 14 is shown in detail. This is provided with a tubular housing 44 with a first end portion 46 and a second end portion 48. The tubular housing 44 houses a piston 50 movably disposed between the two end portions 46, 48. A handle 54 is attached to the piston 50 by means of a piston rod 52. The piston has its front side 58 and the rear side 60 between which and the first end portion 46 of the tubular housing 44 is a coil spring 62 pushing the piston 50 towards the second end portion 48 of the tubular housing. a spray nozzle 66 is provided at the outlet of the second end portion 48 of the tubular housing 44. As will be explained below, the second end portion 48 of the tubular housing 44 is provided with two valves, two chambers and two other springs.

Externally, on the other end portion 48 of the tubular housing 44 is a trigger sleeve 68 with a push lever 70 for the thumb of the operator's hand. In the spray nozzle 66, a fluid return mechanism 72 and a fixed connector 74 are provided to communicate with the inlet tubing 12. Between the front side 58 of the piston 50 and the right end 48 of the tubular housing 44 is a main fluid chamber 80 from the vessel 10. 2) when the handle 54 is pulled to the left. In Figures 6 to 9, the hand sprayer 14 is shown in a relaxed, depressurized position, such as during transportation or storage, where the hand sprayer 14 is separated from the container 10.

10 to 12 show a spray mechanism of a relatively simple and reliable embodiment. The cross-sections in Figs. 10 and 11 extend through the right end portion 48 of the tubular housing 44. The supply line 12 is connected to a connector 74 which connects it to the chamber 82. This is separated from the main chamber 80 by an inlet valve 84, also called. check valve which opens depending on the pressure difference before and after it. When the piston 50 is pulled to the left by the operator, the main chamber 80 expands. Thus, the pressure in it decreases, while the pressure acting on the liquid is atmospheric, ie higher. Thereby, the pressures before and after the inlet valve 84 will be distributed and opened as indicated in dashed lines. The liquid is sucked from the vessel 10 into the main chamber 80. As the piston 50 is pulled to the left by the operator, the coil spring 62 (FIG. 9) is compressed. The main chamber 80 in front of the piston 50 is thus filled with liquid. Compression of the coil spring 62 produces a force on the piston 50 uvolnění 99 ► ♦ · ► · «··

9 in the opposite direction, the pressure exerted on the aspirated liquid in the main chamber 80 increases and the opposite differential pressure before and after the inlet valve 84 closes it.

In parallel with the inlet valve 84, a master valve 88 is provided in the second end portion 48. This valve 88 is provided with a central longitudinal channel 90, left and right, respectively. a first radial passageway 92 and a right, respectively, radial passageway 92, respectively. a second radial passage 94 at the front 93 of the stem valve 88 at the end of the central longitudinal channel 90. At its opposite end there is a plug 96 closing the central longitudinal channel 90 on the other side. The stem valve 88 is circumferentially provided with a first O-ring 98 sealing it. the outer circumference at Cel. Subsequently, a second O-ring 100, a third O-ring 102 and a fourth O-ring 104 are disposed axially axially around the outer periphery of the stem valve 88, thereby sealing and separating the different portions around the periphery of the stem valve 88. This is provided with an external threaded portion 106, which is in engagement with the internal thread 108 of the nozzle 66. This ensures consistent axial movement of the nozzle 66 together with the stem valve 88 when exerting an external force thereon, but permits relative rotation and thereby adjusting the fluid flow exiting the nozzle 66. a rounded head 110 and a spray outlet port 112 therein. Immediately in front of it, a third and a third valve 88, respectively, are disposed therebetween and the stem valve. the nozzle chamber 114. The nozzle 66 is further provided with an annular rim 118, an annular arm 116, and an annular face 119.

The second end portion 48 of the tubular housing 44 is provided with a first peripheral portion 120 with an annular flange 122 on the outer periphery and a circular abutment surface 124 of the first O-ring 98 of the stem valve 88. A valve spring 126 is disposed between the annular flange 122 and the annular edge 118.

The trigger sleeve 68 provided around the second end portion 48 of the tubular sleeve 44 is provided with an end stop flange 130 forming a stop of the annular face 119 of the nozzle 66. When the thumb 70 moves the trigger sleeve 68 to the left as shown in FIGS. , the nozzle also performs a sliding movement to the left and the stem valve 88 and the valve 88 respectively. its first O-ring 98 is lifted from the annular bearing surface 124 as shown in FIG. 11. Once this has occurred, the liquid is forced in the direction of arrow 132 around the end of the stem valve 88 through the first radial passage 92 into the central longitudinal channel 90 and into second radial passage 94, then into nozzle chamber 114 and thence out through spray outlet port 112.

φ φ * * φ φ φ φ • · · · · · · · · · · · · · • · • • • • •

When the operator ' s finger pressure on the push lever 70 ceases, the force of the valve spring 126 closes the further passage of liquid due to the first O-ring 98 engaging the annular bearing surface 124 and the liquid ejection from the spray outlet port 112 ceases.

The stem valve 88 (see now Fig. 12) is provided with a longitudinal slot 121 for receiving the longitudinal tongue 123. This ensures that the nozzle 66 can be rotated while the stem valve 88 is rotated with it, but can simultaneously move in the axial longitudinal direction.

Giant. 12 to 15 show in detail the left, i.e., the first end portion 46 of the tubular housing 44. This is closed by a screwed lid 64 which is provided with an outer wall 138 and a central hole 139 for the piston rod 52 which is thus led out. The lid 64 is provided with an arcuate rim 140 formed at an acute angle over a portion of a circular sector. The piston rod 52 is provided with a radial arcuate projection 142 formed again at an acute angle over a portion of the circular sector. Thus, a stop catching cavity 143 for the radial arcuate projection 142 of the piston rod 52 is formed in the bead 140. This can be rotated, preferably by 180 [deg.], And in its position axially to the right, i.e. when it is inserted, can thus be fixed with respect to the tubular sleeve 44, as shown in FIGS. 13 and 14, both against axial movement and against rotation. In this position, the pump formed by the piston 50 is disabled because its movement is blocked. Also, the unpressurized state of the pump is ensured since the coil spring 62 is released. Conversely, in the rotated position of the piston rod 52 as shown in Fig. 15, the piston 50 is unlocked and its operation as a pump is enabled, since the arcuate protrusion 142 is outside the stop catching cavity 143 of the cap 64 in the lower position as shown in Figs. 15. In this position, liquid pressurisation is possible as indicated, since the piston rod 52 can be pulled to the left against the action of the coil spring 62, and upon release of the piston rod 52, exert the necessary pressure to start and maintain the coil spring 62 spraying.

Referring again to FIG. 10, the safety feature of the liquid return mechanism 72 for returning it from the main chamber 80 and the chamber 82 back to the container 10 will now be described, unless spraying or spraying is performed. The return mechanism 72 comprises a plunger 144 with an activation button 145 and a return spring 144. The plunger 141 is housed in its short housing.

4 * 44 4

4 9

9 9

4 4 ··· ·

11 146 of the tubular sleeve 44 located in its right, i.e., second end portion 48. When the actuating button 145 is pressed, it moves to the left by sliding movement along the outer periphery 148 of the short sleeve 146. the engagement surface 152 of the plunger 141 and pushes it against the inlet valve 84 as a result of which the liquid opens from the main chamber 80 through the chamber 82 to the supply line 12 and back into the vessel 10. The force required for this The liquid spring is developed by a coil spring 62 (FIG. 9).

Giant. 16 to 18 illustrate another preferred inventive embodiment. A hand sprayer 200 is shown in an outer housing 202 with an inner cylindrical housing 204 and a lower, i.e., lower end portion 206 and an upper, second end portion 208. Inside, a piston 210 movable between these end portions 206, 208 is disposed. 210, a pull handle 212 is attached by means of a piston rod 214. Inside is a coil spring 216 exerting a compressive force on the piston 210 upward.

As best seen in FIG. 18, when the piston 210 is pulled down by the pull handle 212, the coil spring 216 is compressed and applies pressure to the piston 210. The main chamber 220 also expands in front of the piston 210 and is filled with liquid as a result of the vacuum generated therein, as described below.

An inlet valve 222 is disposed at the end of the supply line 224 from the vessel 226. The vessel 222 is preferably formed and arranged as the vessel 10 in Figs. 1 and 2. As shown in Figs. 1 and 16, it is again arranged separately. The inlet valve 222 comprises a ball 230 normally seated in the valve seat 232 and bound by the cage 234. Upon pulling the pull handle 212 and pulling the piston 210 down, the main chamber 220 is expanded and liquid is sucked into the inlet valve 222 through the handling chamber. 240 located in front of the main chamber 220. Thus, the apparatus is ready for operation.

Subsequently, the liquid is discharged through the nozzle 242. The handling chamber 240 is provided with an outlet valve 244. It comprises a sliding valve element 246, its spring 248 and an outlet 252 to the nozzle 242. The outer cover 202 is provided with a trigger 254 with pushbutton 255, shaft 256 and arm 258. This is connected to the slider valve member 246. When the trigger 254 is depressed, the arm 258 will rotate, causing the valve member to move 9 9 · 9 9 · 9 9 9 «♦ 9 9 · ····

12246 to the left and compress the spring 248. As a result of its movement, the transfer hole 250 still obscured by the valve element 246. When the shutter-release knob 255 is released, the arm 258 returns to its original position and the valve element 246 returns. Thus, the simple, reliable and undemanding design and function of the inventive embodiment is evident from this.

Figures 19 and 20 show another alternative of the inventive embodiment. The hand sprayer 280 has an outer housing 282, an inner cylindrical housing 284 with a piston 286, and a handle 288. As in the previous embodiment, the inner cylindrical housing 284 has a first end portion 290 and a second end portion 292. The structure is very similar to the previous embodiment. here, however, the cable 294. Its one end 295 is connected to the lower end 296 of the inner cylindrical housing 284 and the other end 297 to anchor 298 on the pull handle 288. Between the two ends 296, 297 of the cable 294 is guided via a pulley 300 attached to the piston 286. Again, as in the previous embodiment, by pulling the piston 286, the main chamber 302 is formed while the spring 287 is compressed. As a result of the underpressure created therein, the liquid is sucked in and its injection proceeds as in the previous case. An advantage of the pulley 300 used is that roughly half the force required for pulling out the piston 286 compared to the embodiment of FIGS. 16-18.

Similar to the embodiment of FIGS. 16 to 18, this embodiment includes a feed line 303, a first valve 304, a second valve 306, and a nozzle 308. The trigger 310 and its mechanism is identical to the embodiment of FIGS. 16 to 18.

Referring now to FIG. 21, another inventive embodiment will now be described, in particular in its external form. The hand sprayer 160 includes a pistol grip 160 and a faucet 164. The feed line 166 is connected to the bottom of the pistol grip 160. The pull handle 168 is visually integrated into the overall configuration.

Referring now to FIG. 22, a further inventive embodiment in terms of its external configuration will be described. This embodiment is based on the hand spraying apparatus 180 is substantially similar to that of FIG. 16 except that the embodiment of FIG. 22 is provided with a pisytol handle 182.

»· 9 9 9 9 9 9 9 9 9 9 9 9

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Fig. 23 shows another embodiment, similar to that of Fig. 1, except that the hand sprayer 190 is attached directly to the container 192. This is made of a suitable material, such as polypropylene.

In the embodiment of Figures 1 to 15, the user first removes the hand sprayer 14 from the receptacle 24 and unwinds the supply line 12 from the jumper 40. Then, he lifts the rotary valve 28 by the end 34, thereby exposing the contents of the container 10. 4 and 5 lifts the valve element 31 and pushes the connector 35. This allows liquid 38 in the vessel 10 to enter the supply line 12.

To pressurize the system, the operator holds in one hand the hand sprayer 14 by its tubular housing 44 and pulls the piston 80 by the pull handle. This compresses the spring 62 and fills the main chamber 80 by sucking liquid into it. Thereafter, the operator moves the hand onto the trigger sleeve 68 and depresses the lever 70 with the thumb. This releases the passage between the O-ring 98 and the bearing surface 124 (Fig. 10,11) and pressurized fluid flows through the first radial passage 92 into the central longitudinal channel 90 through a radial passage 94 in front of the stem valve 88 into the nozzle chamber 114 and out of the nozzle 112 therefrom. The spray can thereby be adjusted by rotating the stem valve 88 on the thread 108 of the nozzle 66, thereby changing the position of the stem front portion 93 relative to the nozzle exit orifice 112 and hence the angle of the exit cone of the spray liquid. The liquid is ejected out as long as it is pushed by the piston 50, respectively. after reaching the end dead center position of the piston 50, further liquid injection stops. To repeat the process by pulling the plunger 50 against the pressure of the spring 62, the liquid again sucks into the main chamber 80 from the container 10 and work can continue when the liquid is in the container 10. However, at any time it is possible to close the container by reversing the rotary valve element 31 from the vertical position to the horizontal position (FIG. 4,5). After one container 10 has been emptied, it is possible to replace it with a new full one in this described seal of the outlet. The container 10 with the remainder of the liquid is disposed of in the prescribed manner and the supply line 12 with the hand sprayer 14 remains reusable after being connected to a new full container 10.

♦ · · · · · · 4 4 4 4 4 4 4 4 4 4 4

- 14If spraying is to end sooner. Before the spring 62 reaches its released position at the end of the dead center of the piston 50, the button 145 of the fluid return mechanism is depressed. This causes the plunger 141 to open the control valve 84 to transfer fluid from the main chamber 80 to the chamber 82 and from there back to the supply line 12 and the container 10. In this way the device is depressurized and the supply line 12 can be stored on the container 10 again. to return the hand sprayer 14 to the plug-in sleeve 24. After the liquid has been returned to the container 10, the rotary valve 28 is brought back to the horizontal position, whereby the container 10 is tightly closed again.

16 to 23, the hand sprayer 160, 180, 200, 280 is filled by sucking liquid in through the piston 210, 286 due to the pressure drop in the hand sprayer 160, 180, 200, 286. After the main chamber 220 has been filled, the inlet valve 222 closes due to the atmospheric pressure difference and the spring 216 pressure, and the liquid between the inlet valve 222 and the outlet valve 244 is ready to spray or discharge. for spraying. This occurs when the trigger button 255 is pressed and the liquid exits as long as the trigger 254 is depressed. When the trigger 254 is released, the outlet valve 244 closes and the liquid is no longer sprayed. The spraying can be repeated until the main chamber 220 is emptied, after which the liquid can be re-aspirated as described and the process repeated.

Various embodiments and arrangements of the invention are described in detail in the application. However, other modifications and variants based on possible equivalents are within the scope of protection of the invention. For example, different trigger mechanisms, valves and nozzles can be used, as well as different, e.g., aesthetically, other housing and housing designs. Various handles, piston rods, pulleys, cylinders and pistons can be used as equivalents. Other alternatives will also be equivalent, as will many new technologies. It is not the purpose or the intention of the invention to limit the application in any way in connection with the equivalence instruction.

Industrial applicability

The invention is useful in the manufacture and use of sprinkler and spray devices and devices for a variety of purposes.

Claims (29)

PATENT CLAIMS A hand sprayer comprising in combination: a hand-held, generally tubular housing with first and second end portions; a piston with two sides movably arranged in said housing; a handle coupled to the piston and positioned outside the housing, configured to be grasped by the user to move the piston toward one end portion of the housing; a first spring disposed in the housing between one side of the piston and the first end portion of the housing to apply a force to the piston towards the second end portion of the housing; a first chamber formed in the housing between the second side of the piston and the second end portion of the housing; a second chamber in communication with the housing operatively connected to the tank containing the spray liquid; a first valve separating the second chamber from the first chamber; a second valve provided in the housing communicating with the first chamber; a nozzle connected to the second end portion of the housing; a second spring housed in the housing for engaging and applying pressure to the nozzle; a manually actuated trigger in conjunction with the nozzle for actuating the nozzle as well as a second valve wherein liquid in the first chamber is ejected through the nozzle. - 16 »· 44 • * 4 • · 444 • 4 4 4 44 44 4 · 4 * • «· 4 • ♦ 4 4 4 4 4 44 4444 Hand sprayer according to claim 1, characterized in that: the second valve comprises a master valve connected to the nozzle; the trigger causes the liquid to be sprayed by moving the nozzle and the stem valve towards the first end portion of the housing, while the second spring is compressed to exert a force to return the stem valve and the nozzle to the closed position; and the housing includes a first housing portion in which a stem valve is disposed. Hand sprayer according to claim 2, characterized in that: the housing includes a second cover portion for receiving the plunger to open the first valve. A hand sprayer according to claim 3, characterized in that it comprises: a plunger housed in the second housing portion to engage and open the first valve to allow flow of liquid disposed in the first chamber to the second chamber and back to the tank. Hand sprayer according to claim 1, characterized in that: the trigger is a generally tubular element arranged around the housing. 6. The hand sprayer of claim 1 including: an end cap connected to the first end portion of the housing, the cap having a skirt, and wherein: - 17 * 4 4 4 4 99 99 44 4 4 4 4 4 4 44 9 9 9 4 4 4 · The handle includes a lip for engaging the rim to prevent movement of said piston by the handle. A hand sprayer according to claim 1, characterized in that: the stem valve has a central longitudinal channel operatively connected to the orifice in the nozzle. 8. The hand sprayer of claim 1, comprising: a third chamber positioned between the second valve and the nozzle; and wherein the handle is located behind the first end portion of the housing; a second chamber is formed in the second end portion of the housing; and the first valve is disposed in the second end portion of the housing. 9. The hand sprayer of claim 4, comprising: a third spring exerting force on the plunger out of engagement with the first valve. 10. The hand sprayer of claim 4, comprising: a third chamber positioned between the second valve and the nozzle; and a third spring exerting force on the plunger out of engagement with the first valve. * fc • fcfcfc »fcfcfcfc - 18, in combination with: 11. A hand spraying system, characterized by a tank for storing liquid to be sprayed; and a hand sprayer separated from the tank and comprising a housing with first and second end portions, a piston with two sides movably arranged in the housing, a piston-connected handle arranged for gripping by the user for moving the piston, a first spring disposed in the housing between one side a first chamber formed in the housing between the second side of the piston and a second housing end, and a second chamber in communication with the second housing end operatively connected to the liquid in the tank; a first valve separating the second chamber from the first chamber, a second valve disposed in the second end portion of the housing communicating with the first chamber, a nozzle connected to the second end portion of the housing, a second spring disposed in the housing for engaging the nozzle; for moving the nozzle and the second valve, wherein liquid in the first chamber is ejected through the nozzle. 12. The hand spraying system of claim 11, comprising: a supply line connecting the tank to the hand sprayer; and a storage sleeve connected to the tank for receiving the hand sprayer. 13. The hand-held sprayer system of claim 12, wherein: the second valve comprises a master valve connected to the nozzle; a trigger for moving the nozzle and stem valve toward the first end portion of the housing upon actuation of the trigger, the second spring being compressed to apply force to the stem valve and nozzle; and 9 9 9 99 99 9 9 99 99 99 99 • _Λ 9 * 9 9 9 9 that: 11 m, of: 9 9 • 9. ··: · · The housing comprises a first sleeve housing a stem valve. The hand sprayer system of claim 13, wherein the housing comprises a second sleeve for receiving the plunger; and that it comprises a safety valve connected to the tank and a supply line. The hand sprayer system of claim 14, wherein the plunger is arranged in the second sleeve to engage and open the first valve to allow fluid flow in the first chamber to the second chamber and back to the tank. The hand-held sprayer system of claim 15, comprising: a third chamber positioned between the second valve and the nozzle; a third spring exerting force on the plunger out of engagement with the first valve. 17. The hand sprayer system of claim 16, comprising: a lid connected to the first end portion of the housing and provided with a skirt; and where: the handle includes a projection for engaging the lid rim to engage the handle. 18. The hand-held sprayer system of claim 11, comprising: ··· ·· · A third chamber positioned between the second valve and the nozzle; a third spring exerting force on the plunger out of engagement with the first valve. 19. A hand spraying system comprising in combination: tank for storing liquid for spraying; supply line removably connected to the tank; a hand spraying device comprising a housing with first and second end portions, a first sleeve and a second sleeve connected to a supply line; a piston movably mounted in the housing; a first chamber formed in the housing between the piston and the second end portion of the housing; a second chamber formed in the second sleeve; a nozzle associated with the housing; a first valve disposed within the housing and separating the first water chamber of the second chamber; a second valve disposed in the first sleeve sleeve and separating the first chamber and nozzle; an opening in the housing for connecting the supply line and connecting the supply line to the second chamber; a handle coupled to the piston to move the piston relative to the housing; 1 4 1 4 4 4 4 4 4 4 4 4 44 44 44 44 · 4,444 4 -21 a plunger adapted to engage the first valve; and a trigger for opening the second valve. 20. The hand-held sprayer system of claim 19, comprising: a first spring in the housing for exerting force on the piston towards the second end portion of the housing; a second spring in contact with the second valve to apply force to the second valve toward its closed position; and a third spring for exerting force on the plunger away from the second valve. 21. The hand-held sprayer system of claim 20, wherein: a second spring is arranged around the first sleeve; the handle includes a hem; and a protrusion for engaging the rim of the handle is secured to the housing. 22. The hand sprayer system of claim 22, wherein: the second valve comprises a master valve; and that it contains: An O-ring arranged around the stem valve; a valve seat formed by a portion of the first sleeve. -22 23. A hand sprayer comprising in combination: a housing with first and second end portions spaced from the reservoir with the liquid to be sprayed; a piston movably mounted in the housing between the first and second end portions; a handle connected to the piston and adapted to be operated by a user of a hand sprayer that moves the piston towards the first end portion of the housing; a first spring operatively coupled to the piston and exerting a force thereon toward the second end portion of the housing; a chamber formed in the housing as the piston moves towards the first end portion of the housing, the chamber being operatively connected to a separate tank of liquid to be sprayed; a first valve disposed between the liquid tank, which is open when actuating the handle for moving the piston towards the first end portion of the housing; a nozzle operatively connected to the housing and positioned to receive fluid from said chamber; a second valve separating said chamber from the nozzle; and an actuator operably connected to the second valve to open the valve and allow fluid to pass from said chamber to the nozzle. 24. The hand sprayer of claim 23, further comprising: an outer housing surrounding the housing, the piston, the first spring, the first valve, and the second valve. -23 · • ♦♦ · 25. The hand-held sprayer of claim 23, wherein: the second valve comprises a movable member, an opening and a second spring exerting force on the movable member to close said opening. 26. The hand sprayer of claim 23, comprising: a second chamber positioned between the first and second valves. 27. The hand sprayer of claim 23 comprising: a supply line disposed in said outer housing and connected to the first valve. 28. The hand sprayer of claim 23, wherein the actuator includes an actuator button, a shaft coupled to the actuator button, and an arm for engaging the second valve. 29. The hand sprayer of claim 28, wherein: the second valve comprises a movable member, an opening, and a second spring exerting force on the movable member to close the opening; and the actuator arm engages the movable member of the second valve to move the movable member against the force exerted by the second spring. Hand sprayer according to claim 29, characterized in that it comprises: • · ·· ·· · · -24 outer cover surrounding housing, piston, first spring, first valve and second valve. 31. The hand sprayer of claim 30, comprising: a supply line located in the outer housing and connected to the first valve. 32. The hand sprayer of claim 31, comprising: a second chamber positioned between the first and second valves. ·· ··