EP0650767A1 - Multiple nozzle liquid spray gun - Google Patents
Multiple nozzle liquid spray gun Download PDFInfo
- Publication number
- EP0650767A1 EP0650767A1 EP94830513A EP94830513A EP0650767A1 EP 0650767 A1 EP0650767 A1 EP 0650767A1 EP 94830513 A EP94830513 A EP 94830513A EP 94830513 A EP94830513 A EP 94830513A EP 0650767 A1 EP0650767 A1 EP 0650767A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- spray
- cylinder
- trigger
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
- B05B11/1009—Piston pumps actuated by a lever
- B05B11/1011—Piston pumps actuated by a lever without substantial movement of the nozzle in the direction of the pressure stroke
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1042—Components or details
- B05B11/1073—Springs
- B05B11/1074—Springs located outside pump chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1081—Arrangements for pumping several liquids or other fluent materials from several containers, e.g. for mixing them at the moment of pumping
- B05B11/1084—Arrangements for pumping several liquids or other fluent materials from several containers, e.g. for mixing them at the moment of pumping each liquid or other fluent material being pumped by a separate pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1087—Combination of liquid and air pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2464—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device a liquid being fed by mechanical pumping from the container to the nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2472—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device comprising several containers
Definitions
- the present invention relates to a multiple nozzle, liquid spray-gun, particularly useful for cleaning surfaces.
- liquid dispensing pumps commonly known as spray-guns (the term “spray-gun” being used hereinafter as a synonym for "liquid dispensing pump”) constitute one of the most convenient, effective and safe means of cleaning surfaces of various kinds; the said spray-guns are used to dispense liquids which attack the particles of dirt on the surfaces to be cleaned.
- These spray-guns consist basically of a spray-head attached (for example by screwing) to a tank containing the liquid to be sprayed.
- the spray-head has a discharge nozzle and internally defines a pumping chamber which enables the liquid to be drawn from the tank and channelled towards the discharge nozzle.
- the flow of the liquid within the chamber is controlled by the user through an external lever or trigger which operates on the part of the pumping chamber located inside the spray-head and designed to control the operation of nonreturn valves mounted by the discharge nozzle and by the pumping chamber.
- the user To start operating the spray-gun, the user must alternately pull and release the trigger several times in such a way as to increase the pressure in the pumping chamber, thus opening the valve at the tank end to draw liquid from the tank itself, and closing the valve at the discharge nozzle so as to fill the liquid drawn from the tank into a prechamber (either rigid or flexible) adjacent to the nozzle itself.
- the valve at the nozzle opens, allowing some of the liquid to pass from the prechamber to the nozzle so that, when the trigger is next pulled, the valve closes again and the liquid is discharged to the atmosphere through the nozzle.
- the object of the present invention is to eliminate the disadvantages mentioned above by providing a multiple nozzle, liquid spray-gun, comprising several pumps in a single casing, which is compact and manageable and which allows different cleaning components to be selected easily and safely, in a manner that conforms with the health standards of the trade.
- the liquid spray-gun consists of the following basic parts: a handle 3, a revolving element or block 6, a liquid dispensing unit 8, compressive means 15, spring means 16 and valve means 17.
- the handle 3 comprises a trigger 4, pivoted on the handle itself, at point C, and having an active portion 4a inside the handle 3 itself and an external portion 4b that may be operated manually; the active portion 4a consists of a horizontal rod 4c hinged to the upper end of the trigger 4.
- the handle 3 also has a tubular extension 5 into which the aforesaid revolving block 6 fits.
- the block 6, also tubular, is rotatably coupled to the extension 5 through appropriate means 7, which may, for example, be the ends of these two elements themselves, with an undercut 18 and a circumferential lip 19 forming a sliding fit which enables the two elements to rotate relative to each other.
- appropriate means 7 may, for example, be the ends of these two elements themselves, with an undercut 18 and a circumferential lip 19 forming a sliding fit which enables the two elements to rotate relative to each other.
- An anti-friction means (bearing or other) may also be provided to improve the sliding fit between the extension 5 and the block 6.
- the outer edge of the revolving block 6 may have hand gripping means 20 designed to allow the block to be revolved about its longitudinal axis X and consisting, for example, of a crown element 21c forming an integral part of the block itself.
- the revolving block 6 mounts the aforesaid liquid dispensing unit 8 which in turn comprises: a cover 9 which closes the end of the block 6 and a series of nozzles 1 which, in the embodiment being described, are four in number but which may be more or less than this according to the cleaning requirements which the spray-gun is to be used for.
- a cover 9 which closes the end of the block 6
- a series of nozzles 1 which, in the embodiment being described, are four in number but which may be more or less than this according to the cleaning requirements which the spray-gun is to be used for.
- Each of the nozzles 1 is connected to a corresponding dispensing cylinder 10, which, when necessary, by turning the revolving block 6, may be lined up with the active portion of the trigger 4.
- the aforesaid cover 9 is nonadjustably fixed (by gluing or welding) to the revolving block 6 and mounts the nozzles 1 which are interchangeable (with rapid fittings or screw-on connections with sealing rings, not illustrated), each nozzle being set in such a way as to be off centre with respect to the corresponding cylinder 10.
- the revolving block 6 also mounts a dispensing unit for the liquids to be sprayed comprising a first tube 12 and a second tube 13; the first tube 12 is rigid and, there being one for each cylinder 10, connects the cylinder to the corresponding tube 13, which is flexible and which, being connected to a corresponding tank 14, feeds the liquid to be sprayed.
- each tank 14 is separate from the spray-gun and may be carried by the user secured to his belt or to a special work belt E (not illustrated in detail).
- the liquid dispensing unit 8 consists of a cylindrical sector 26 located in the middle of the revolving block 6 and associated to the first tubes 12, each of which has a channel 27 feeding into the corresponding cylinder 10.
- Each of the said channels 27 is open (for cleaning purposes) at the end leading out through the outer surface of the cover 9 and may be closed using stoppers 40.
- Each of the second, flexible tubes 13 is coaxially connected to the corresponding first, rigid tube 12 and travels along the entire length of handle 3 and feeds out of the bottom end of the latter.
- the handle 3 is equipped with a double-ended fitting 41 for each tube 13 where the external section of tube 13 connected to the related tank 14 may be attached.
- the numeral 15 indicates compressive means located between the active end of the trigger 14 and the corresponding dispensing cylinder 10, the said compressive means revolving together with the cylinder and being designed, when active, to force liquid out of the related cylinder 10 towards the corresponding nozzle 1.
- the said compressive means 15 consist, for each cylinder 10, of a chamber 21 housing the stem 22 of a plunger 23; one end of the said plunger is equipped with a plate 24 which lines up with the aforesaid active portion 4a of the trigger 4.
- the stem 22 has a second plate 25 integral with it which travels inside the corresponding cylinder 10 and which is designed to force the liquid outwards.
- a spring 16 placed around the stem 22 and retained at one end by the first plate 24 and at the other end by an inner surface of the chamber 21 itself; the said springs 16 operate on the compressive means 15 to determine a force counteropposing the force of the liquid discharge pressure in such a way as to cause the trigger 4 to move back to its inactive position ready to be activated again (as described in more detail below).
- valve means located at each nozzle 1 and at the second tubes 13, enabling the liquid to be drawn from the tanks 14 into the cylinders 10 when the compressive means 15 are operated.
- the said valve means 17 consist of pairs of nonreturn valves 17a and 17b (the number of valve pairs depending on the number of chambers the spray-gun has), one valve being located at the corresponding nozzle 1 (at the point where the latter is connected with the cylinder 10) and the other at the point on the corresponding second tube 13 where the latter feeds out of the handle 3, that is to say, on the double-end fitting 41 on the handle itself.
- a spray-gun constructed in the manner described above, assuming a configuration with four nozzles 1 and with the tanks 14 full of different liquids already connected to the related tubes, may be used as follows.
- the user By turning the crown 21c, the user selects the cylinder 10 to be set to spraying position, the crown itself having appropriate reference marks on it, if necessary.
- the user pulls the trigger 4, thus creating vacuum, thanks to nonreturn valves 17a and 17b, which causes the liquid to rise through the second tube 13, the first tube 12 and the channel 27 and to fill the corresponding cylinder 10 (see arrow F in Fig. 1).
- valve 17b of the nozzle 1 When the cylinder 10 is full, that is, when a balance of pressure has been reached, the liquid starts being pressed against valve 17b of the nozzle 1, the valve opens and allows the liquid to be discharged in the form of a jet.
- the jet is created by the trigger 4 which presses on the first plate 24 of plunger 23 which in turn causes the second plate 25 to move into the cylinder 10 creating a high pressure that forces the liquid out of the cylinder (in Fig. 1, this position is shown with a broken line).
- the spring 16 returns the trigger quickly to its starting position so that the spraying cycle may be repeated (in Fig. 1, this position is shown with a continuous line).
- the tanks 14 may be fitted to the user's belt whilst if there are just a few different liquids (two or three), they may be attached directly to the bottom of the handle 3 (as shown by the broken line in Fig. 1).
- the spray jet is improved as follows: the revolving block 6 is fitted with an additional external tube 100 for each cylinder 10 (four in the case described above), to connect the chamber 21 housing the plunger 23 with the discharge chamber la of the corresponding nozzle 1 located after the aforesaid valve 17a.
- the said tube 100 allows the air generated by the forward motion of the stem 22 of plunger 23 during the compression stage, since each plate 24 is equipped with a ring 101 which seals chamber 16, to pass into the aforesaid chamber la in such a way as to exert a greater discharge pressure on the liquid, irrespective of the position of the valve 17a.
- the tube 100 not only accelerates the discharge of the liquid but also guarantees that the liquid will be discharged if the valve 17a temporarily fails to operate.
- the spray-gun disclosed by the present invention accomplishes the aforestated objects in that it the gun and tank assembly is extremely easy to handle; in addition, the internal structure of the spray-gun is simple and economical and at the same time guarantees efficient operation and safety thanks to the separate, sealed tubes which make it impossible for different liquids to mix.
- the crown element makes for fast easy changing from one cylinder to another, and may, if necessary, have appropriate graphic symbols on it and be used in combination with stop devices made between the revolving block and the tubular extension of the handle in order to facilitate selection of the tank corresponding to the liquid to be sprayed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Coating Apparatus (AREA)
Abstract
Description
- The present invention relates to a multiple nozzle, liquid spray-gun, particularly useful for cleaning surfaces.
- At present, manually operated liquid dispensing pumps, commonly known as spray-guns (the term "spray-gun" being used hereinafter as a synonym for "liquid dispensing pump") constitute one of the most convenient, effective and safe means of cleaning surfaces of various kinds; the said spray-guns are used to dispense liquids which attack the particles of dirt on the surfaces to be cleaned.
- These spray-guns (for example, see patents EPO - 262.484 or US 4.260.079) consist basically of a spray-head attached (for example by screwing) to a tank containing the liquid to be sprayed. The spray-head has a discharge nozzle and internally defines a pumping chamber which enables the liquid to be drawn from the tank and channelled towards the discharge nozzle.
- The flow of the liquid within the chamber is controlled by the user through an external lever or trigger which operates on the part of the pumping chamber located inside the spray-head and designed to control the operation of nonreturn valves mounted by the discharge nozzle and by the pumping chamber. To start operating the spray-gun, the user must alternately pull and release the trigger several times in such a way as to increase the pressure in the pumping chamber, thus opening the valve at the tank end to draw liquid from the tank itself, and closing the valve at the discharge nozzle so as to fill the liquid drawn from the tank into a prechamber (either rigid or flexible) adjacent to the nozzle itself.
- The next time the trigger is released after the prechamber has filled with liquid, the valve at the nozzle opens, allowing some of the liquid to pass from the prechamber to the nozzle so that, when the trigger is next pulled, the valve closes again and the liquid is discharged to the atmosphere through the nozzle.
- Although the systems adopted until now to pump the liquid from the tank or container to the nozzle differ from each other in complexity (for example, delayed-action springs to open the nozzle or systems with multiple relief valves), all the spray-guns disclosed in prior patents are single-purpose or "dedicated" spray-guns. In other terms, a user who wishes to clean different types of surfaces must have the corresponding number of individual containers with a different spray-head for each different type of liquid to be sprayed.
- The results are a cumbersome load of equipment to be carried around by a user who needs to have a spray-gun handy for each type of work to be done and higher costs of maintenance because there are more spray-guns to be used.
- Moreover, in accordance with current health regulations, public health authorities prohibit the use of an interchangeable spray-head for two or more tanks because of the risk that different liquid chemical cleaners might mix, with dangerous consequences for both the environment and the user's health.
- The object of the present invention is to eliminate the disadvantages mentioned above by providing a multiple nozzle, liquid spray-gun, comprising several pumps in a single casing, which is compact and manageable and which allows different cleaning components to be selected easily and safely, in a manner that conforms with the health standards of the trade.
- The technical characteristics of the invention are laid out in the claims below and the advantages of the disclosure are apparent from the detailed description which follows, with reference to the accompanying drawings, which illustrate a preferred embodiment of the invention by way of example and in which:
- Figure 1 illustrates the spray-gun disclosed by the present invention in a schematic side view with some parts cut away in order to better illustrate other parts;
- Figure 2 is a schematic front view of the spray-gun as embodied in Fig.1.
- Referring now to the embodiment illustrated in Figs. 1 and 2, the liquid spray-gun consists of the following basic parts: a
handle 3, a revolving element orblock 6, a liquid dispensingunit 8,compressive means 15,spring means 16 and valve means 17. - These parts will now be described in more detail, with reference to Fig. 1. The
handle 3 comprises atrigger 4, pivoted on the handle itself, at point C, and having anactive portion 4a inside thehandle 3 itself and an external portion 4b that may be operated manually; theactive portion 4a consists of ahorizontal rod 4c hinged to the upper end of thetrigger 4. Thehandle 3 also has atubular extension 5 into which theaforesaid revolving block 6 fits. - The
block 6, also tubular, is rotatably coupled to theextension 5 throughappropriate means 7, which may, for example, be the ends of these two elements themselves, with an undercut 18 and acircumferential lip 19 forming a sliding fit which enables the two elements to rotate relative to each other. An anti-friction means (bearing or other) may also be provided to improve the sliding fit between theextension 5 and theblock 6. - In addition, the outer edge of the revolving
block 6 may have hand gripping means 20 designed to allow the block to be revolved about its longitudinal axis X and consisting, for example, of acrown element 21c forming an integral part of the block itself. - At its free end, the revolving
block 6 mounts the aforesaidliquid dispensing unit 8 which in turn comprises: acover 9 which closes the end of theblock 6 and a series ofnozzles 1 which, in the embodiment being described, are four in number but which may be more or less than this according to the cleaning requirements which the spray-gun is to be used for. Each of thenozzles 1 is connected to a corresponding dispensingcylinder 10, which, when necessary, by turning the revolvingblock 6, may be lined up with the active portion of thetrigger 4. - The
aforesaid cover 9 is nonadjustably fixed (by gluing or welding) to the revolvingblock 6 and mounts thenozzles 1 which are interchangeable (with rapid fittings or screw-on connections with sealing rings, not illustrated), each nozzle being set in such a way as to be off centre with respect to thecorresponding cylinder 10. - The revolving
block 6 also mounts a dispensing unit for the liquids to be sprayed comprising afirst tube 12 and asecond tube 13; thefirst tube 12 is rigid and, there being one for eachcylinder 10, connects the cylinder to thecorresponding tube 13, which is flexible and which, being connected to acorresponding tank 14, feeds the liquid to be sprayed. In the embodiment being described, eachtank 14 is separate from the spray-gun and may be carried by the user secured to his belt or to a special work belt E (not illustrated in detail). - The
liquid dispensing unit 8 consists of acylindrical sector 26 located in the middle of the revolvingblock 6 and associated to thefirst tubes 12, each of which has achannel 27 feeding into thecorresponding cylinder 10. Each of thesaid channels 27 is open (for cleaning purposes) at the end leading out through the outer surface of thecover 9 and may be closed usingstoppers 40. - Each of the second,
flexible tubes 13 is coaxially connected to the corresponding first,rigid tube 12 and travels along the entire length ofhandle 3 and feeds out of the bottom end of the latter. At its bottom end, thehandle 3 is equipped with a double-ended fitting 41 for eachtube 13 where the external section oftube 13 connected to therelated tank 14 may be attached. - In Fig. 1, the
numeral 15 indicates compressive means located between the active end of thetrigger 14 and the corresponding dispensingcylinder 10, the said compressive means revolving together with the cylinder and being designed, when active, to force liquid out of therelated cylinder 10 towards thecorresponding nozzle 1. The saidcompressive means 15 consist, for eachcylinder 10, of achamber 21 housing thestem 22 of aplunger 23; one end of the said plunger is equipped with aplate 24 which lines up with the aforesaidactive portion 4a of thetrigger 4. - At its opposite end, the
stem 22 has asecond plate 25 integral with it which travels inside thecorresponding cylinder 10 and which is designed to force the liquid outwards. Inside eachchamber 21, there is also aspring 16 placed around thestem 22 and retained at one end by thefirst plate 24 and at the other end by an inner surface of thechamber 21 itself; the saidsprings 16 operate on thecompressive means 15 to determine a force counteropposing the force of the liquid discharge pressure in such a way as to cause thetrigger 4 to move back to its inactive position ready to be activated again (as described in more detail below). - Finally, the
numeral 17 indicates valve means located at eachnozzle 1 and at thesecond tubes 13, enabling the liquid to be drawn from thetanks 14 into thecylinders 10 when thecompressive means 15 are operated. - The said valve means 17 consist of pairs of
nonreturn valves 17a and 17b (the number of valve pairs depending on the number of chambers the spray-gun has), one valve being located at the corresponding nozzle 1 (at the point where the latter is connected with the cylinder 10) and the other at the point on the correspondingsecond tube 13 where the latter feeds out of thehandle 3, that is to say, on the double-end fitting 41 on the handle itself. - A spray-gun constructed in the manner described above, assuming a configuration with four
nozzles 1 and with thetanks 14 full of different liquids already connected to the related tubes, may be used as follows. - By turning the
crown 21c, the user selects thecylinder 10 to be set to spraying position, the crown itself having appropriate reference marks on it, if necessary. Once thecylinder 10 corresponding to the liquid to be sprayed has been selected, the user pulls thetrigger 4, thus creating vacuum, thanks tononreturn valves 17a and 17b, which causes the liquid to rise through thesecond tube 13, thefirst tube 12 and thechannel 27 and to fill the corresponding cylinder 10 (see arrow F in Fig. 1). - When the
cylinder 10 is full, that is, when a balance of pressure has been reached, the liquid starts being pressed against valve 17b of thenozzle 1, the valve opens and allows the liquid to be discharged in the form of a jet. - The jet is created by the
trigger 4 which presses on thefirst plate 24 ofplunger 23 which in turn causes thesecond plate 25 to move into thecylinder 10 creating a high pressure that forces the liquid out of the cylinder (in Fig. 1, this position is shown with a broken line). Thespring 16 returns the trigger quickly to its starting position so that the spraying cycle may be repeated (in Fig. 1, this position is shown with a continuous line). - When the user has finished spraying, he may turn the revolving
block 6 in either direction in order to select another liquid to be sprayed, the spraying cycle being carried out in exactly the same way as that just described. - If there are many different types of liquids to be sprayed, the
tanks 14 may be fitted to the user's belt whilst if there are just a few different liquids (two or three), they may be attached directly to the bottom of the handle 3 (as shown by the broken line in Fig. 1). - In another embodiment of the present invention, shown in Fig. 1, again by a broken line, the spray jet is improved as follows: the revolving
block 6 is fitted with an additionalexternal tube 100 for each cylinder 10 (four in the case described above), to connect thechamber 21 housing theplunger 23 with the discharge chamber la of thecorresponding nozzle 1 located after theaforesaid valve 17a. Thesaid tube 100 allows the air generated by the forward motion of thestem 22 ofplunger 23 during the compression stage, since eachplate 24 is equipped with aring 101 whichseals chamber 16, to pass into the aforesaid chamber la in such a way as to exert a greater discharge pressure on the liquid, irrespective of the position of thevalve 17a. In effect, thetube 100 not only accelerates the discharge of the liquid but also guarantees that the liquid will be discharged if thevalve 17a temporarily fails to operate. - The spray-gun disclosed by the present invention accomplishes the aforestated objects in that it the gun and tank assembly is extremely easy to handle; in addition, the internal structure of the spray-gun is simple and economical and at the same time guarantees efficient operation and safety thanks to the separate, sealed tubes which make it impossible for different liquids to mix. The crown element makes for fast easy changing from one cylinder to another, and may, if necessary, have appropriate graphic symbols on it and be used in combination with stop devices made between the revolving block and the tubular extension of the handle in order to facilitate selection of the tank corresponding to the liquid to be sprayed.
- The invention described can be subject to modifications and variations without thereby departing from the scope of the inventive concept.
- Moreover, all the details of the invention may be substituted by technically equivalent elements.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT93BO000430A IT1264726B1 (en) | 1993-10-29 | 1993-10-29 | MULTI-NOZZLE LIQUID DISPENSING GUN. |
ITBO930430 | 1993-10-29 | ||
ITBO893430 | 1993-10-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0650767A1 true EP0650767A1 (en) | 1995-05-03 |
EP0650767B1 EP0650767B1 (en) | 1998-06-24 |
Family
ID=11339287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94830513A Expired - Lifetime EP0650767B1 (en) | 1993-10-29 | 1994-10-28 | Multiple nozzle liquid spray gun |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0650767B1 (en) |
DE (1) | DE69411245T2 (en) |
IT (1) | IT1264726B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2733800A1 (en) * | 1995-05-04 | 1996-11-08 | Roche Vincent | Rotary cap fitting to allow pumping from selected container of several, |
FR2902088A1 (en) * | 2006-06-12 | 2007-12-14 | Oreal | Product e.g. perfume, distribution device, has recipients provided such that device permits user to select one of recipients to distribute product of selected recipient, where recipients contain products |
ITBO20120211A1 (en) * | 2012-04-17 | 2013-10-18 | Ndustriali S R L | SPRAY DISPENSER OF LIQUID PRODUCTS |
CN107583777A (en) * | 2017-10-26 | 2018-01-16 | 德清富源涂装设备有限公司 | Manual spray equipment |
CN111013847A (en) * | 2019-12-10 | 2020-04-17 | 胡梦茹 | Spray gun device of coating spraying machine with low splashing rate |
EP4186599A1 (en) * | 2021-11-24 | 2023-05-31 | David Pagan Valverde | Multi-compartment sprayer |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE546389A (en) * | ||||
FR958376A (en) * | 1950-03-08 | |||
DE3011634A1 (en) * | 1980-03-26 | 1981-10-08 | Gerhart 3000 Hannover Daubner | Multichamber hand spray can - has suction pressure pump with inlet and pressure pipes to several chambers in one container and with selectively usable spray nozzles |
DE3009759A1 (en) * | 1980-02-20 | 1982-08-19 | Gerhart 3000 Hannover Daubner | Multi-chamber hand spray tin - uses separate guide paths from suction tube in separate chambers to nozzle |
EP0379627A1 (en) * | 1989-01-26 | 1990-08-01 | Dispray S.A. | Bottle with double delivery device for liquids or pasters |
EP0391746A2 (en) * | 1989-04-07 | 1990-10-10 | Tosoh Corporation | Apparatus for the separate injection of reagents |
US5152431A (en) * | 1991-06-21 | 1992-10-06 | Sterling Drug, Inc. | Pump apparatus for dispensing a selected one of a plurality of liquids |
-
1993
- 1993-10-29 IT IT93BO000430A patent/IT1264726B1/en active IP Right Grant
-
1994
- 1994-10-28 EP EP94830513A patent/EP0650767B1/en not_active Expired - Lifetime
- 1994-10-28 DE DE69411245T patent/DE69411245T2/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE546389A (en) * | ||||
FR958376A (en) * | 1950-03-08 | |||
DE3009759A1 (en) * | 1980-02-20 | 1982-08-19 | Gerhart 3000 Hannover Daubner | Multi-chamber hand spray tin - uses separate guide paths from suction tube in separate chambers to nozzle |
DE3011634A1 (en) * | 1980-03-26 | 1981-10-08 | Gerhart 3000 Hannover Daubner | Multichamber hand spray can - has suction pressure pump with inlet and pressure pipes to several chambers in one container and with selectively usable spray nozzles |
EP0379627A1 (en) * | 1989-01-26 | 1990-08-01 | Dispray S.A. | Bottle with double delivery device for liquids or pasters |
EP0391746A2 (en) * | 1989-04-07 | 1990-10-10 | Tosoh Corporation | Apparatus for the separate injection of reagents |
US5152431A (en) * | 1991-06-21 | 1992-10-06 | Sterling Drug, Inc. | Pump apparatus for dispensing a selected one of a plurality of liquids |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2733800A1 (en) * | 1995-05-04 | 1996-11-08 | Roche Vincent | Rotary cap fitting to allow pumping from selected container of several, |
FR2902088A1 (en) * | 2006-06-12 | 2007-12-14 | Oreal | Product e.g. perfume, distribution device, has recipients provided such that device permits user to select one of recipients to distribute product of selected recipient, where recipients contain products |
ITBO20120211A1 (en) * | 2012-04-17 | 2013-10-18 | Ndustriali S R L | SPRAY DISPENSER OF LIQUID PRODUCTS |
CN107583777A (en) * | 2017-10-26 | 2018-01-16 | 德清富源涂装设备有限公司 | Manual spray equipment |
CN111013847A (en) * | 2019-12-10 | 2020-04-17 | 胡梦茹 | Spray gun device of coating spraying machine with low splashing rate |
CN111013847B (en) * | 2019-12-10 | 2021-01-01 | 江苏浪势塑粉有限公司 | Spray gun device of coating spraying machine with low splashing rate |
EP4186599A1 (en) * | 2021-11-24 | 2023-05-31 | David Pagan Valverde | Multi-compartment sprayer |
ES2954131A1 (en) * | 2021-11-24 | 2023-11-20 | Valverde David Pagan | MULTI-COMPARMENT SPRAYER (Machine-translation by Google Translate, not legally binding) |
Also Published As
Publication number | Publication date |
---|---|
DE69411245D1 (en) | 1998-07-30 |
DE69411245T2 (en) | 1998-10-29 |
EP0650767B1 (en) | 1998-06-24 |
IT1264726B1 (en) | 1996-10-04 |
ITBO930430A1 (en) | 1995-04-29 |
ITBO930430A0 (en) | 1993-10-29 |
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