EP1554051A1 - Leicht zu reinigende sprühpistole - Google Patents
Leicht zu reinigende sprühpistoleInfo
- Publication number
- EP1554051A1 EP1554051A1 EP03773277A EP03773277A EP1554051A1 EP 1554051 A1 EP1554051 A1 EP 1554051A1 EP 03773277 A EP03773277 A EP 03773277A EP 03773277 A EP03773277 A EP 03773277A EP 1554051 A1 EP1554051 A1 EP 1554051A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray
- spray head
- liquid
- reservoir
- nozzle
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2478—Gun with a container which, in normal use, is located above the gun
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
- B05B7/2408—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the container or its attachment means to the spray apparatus
-
- 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
- B05B7/2481—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device with a flexible container for liquid or other fluent material
Definitions
- This invention concerns improvements in or relating to liquid spraying apparatus such as a spray gun. More especially, the invention relates to the delivery system for the liquid to be sprayed. The invention has particular application to a spray head for reducing the amount of cleaning of the spray gun required on completion of spraying and/or when changing over the spray gun to spray a different liquid.
- Spray guns are widely used in vehicle body repair shops when re-spraying a vehicle that has been repaired following an accident.
- the liquid is contained in a reservoir attached to the gun from where it is fed to a spray nozzle.
- the liquid On emerging from the spray nozzle, the liquid is atomised and forms a spray with compressed air supplied to the nozzle.
- the liquid may be gravity fed or suction fed or, more recently, pressure fed by an air bleed line to the reservoir from the compressed air line to the spray gun.
- the liquid is contained in a rigid pot detachably mounted on the spray gun and is delivered to the spray nozzle under the control of a manually operable trigger mechanism on the gun. On completion of spraying, the pot is removed and the gun and pot cleaned for re-use.
- the gun and pot must be thoroughly cleaned with solvents to remove all traces of the liquid to prevent cross-contamination with the next liquid to be sprayed.
- Particular problems arise when cleaning the gun to ensure no deposits are formed within the gun that may affect the operation of the gun.
- the spray nozzle may have to be dis-assembled to enable the spray nozzle and internal passageways of the gun to be properly cleaned. This is time consuming and the use of solvents is undesirable from health and safety considerations and causes problems for disposal of the solvent after use.
- the present invention has been made from a consideration of the foregoing problems and disadvantages of the existing delivery systems for spraying a liquid.
- embodiments of the present invention provide an improved liquid delivery system for use with a spray gun whereby cleaning of the spray gun on completion of spraying and/or when changing over the spray gun to spray a different liquid may be simplified.
- At least one embodiment of the present invention provides a liquid delivery system including a spray head in which the liquid is delivered to a spray nozzle from a reservoir connected to the spray head without passing through the spray gun body.
- At least one embodiment of the present invention provides a liquid delivery system in which the spray head is detachable from the spray gun and can be thrown away after use such that the amount of solvent used to clean the spray gun may be reduced.
- at least one embodiment of the present invention provides a liquid delivery system in which a reservoir for the liquid to be dispensed is mounted on the spray head and is detachable with the spray head from the spray gun.
- liquid spraying apparatus comprising a spray gun including a body, a spray head including a body releasably connected to the spray gun body and further including a spray nozzle, and a liquid reservoir connected to the spray head body for supplying liquid to the spray nozzle.
- liquid refers to all forms of flowable materials that can be applied to a surface using a spray gun (whether or not they are intended to colour the surface) including (without limitation) paints, primers, base coats, lacquers, varnishes and similar paint-like materials as well as other materials such as adhesives, sealers, fillers, putties, powder coatings, blasting powders, abrasive slurries, mould release agents and foundry dressings which may be applied in atomised or non-atomised form depending on the properties and/or the intended application of the material and the term “liquid” is to be construed accordingly.
- liquid withdrawn from the reservoir in use is delivered to the spray nozzle through the spray head body without passing through the spray gun body.
- the spray head is disposable and can be thrown away after use. In this way, cleaning of the spray head can be avoided and the spray gun can be changed over to dispense another liquid by attaching a new spray head with a clean spray nozzle connected to a reservoir for the liquid.
- the spray head body and spray gun body are provided with mateable formations for releasably securing the spray head to the spray gun.
- the mateable formations may form a bayonet type connection that facilitates rapid connection/disconnection of the spray head with a simple push twist action. Any other suitable type of mateable formations providing a releasable connection may be employed.
- the reservoir may be provided at a remote location and connected to the spray head by a flexible delivery line.
- the delivery line includes a manually operable valve to close the delivery line when disconnected from the spray head.
- the reservoir may be mounted on the spray head.
- the spray head body may be provided with an inlet connected to the reservoir.
- the connection between the reservoir and the spray head is releasable such that the reservoir can be detached from the spray head, for example, a bayonet type connection.
- the reservoir may be reusable. More preferably the reservoir or at least the parts of the reservoir contaminated by contact with the liquid are disposable and can be discarded after use. In this way, contaminated parts may be thrown away and the spray gun re-used with a new spray head and reservoir. As a result, the amount of cleaning required on completion of spraying or when changing over the liquid to be sprayed is reduced.
- the reservoir may be collapsible as liquid is withdrawn in use and may be supplied empty for the end user to fill or pre-filled with liquid for connection to the spray head. Where the reservoir is pre-filled, an outlet for the liquid is provided with a closure to seal the reservoir until it is desired to fit the reservoir to the spray head.
- the spray nozzle is adapted to atomise the liquid to form a spray.
- the spray nozzle may be arranged to mix the liquid emerging from the nozzle with a supply of compressed air.
- the spray nozzle has a central hole for the liquid surrounded by a concentric annular opening for compressed air and a pair of opposed inwardly directed apertures for compressed air arranged on opposite sides and spaced forwardly of the central hole.
- the liquid emerging from the central hole is mixed with air streams emerging from the concentric annular opening and from the inwardly directed apertures to cause the liquid to atomise and form a fine spray for application to a substrate.
- the air streams from the inwardly directed apertures may be adjustable to adapt the spray nozzle for dispensing different liquids.
- the inwardly directed apertures may be provided by a member mounted on the spray head body, and a set of interchangeable members may be provided for releasable connection to the spray head body to change, for example, the atomisation parameters or spray pattern as desired.
- atomisation of the liquid may not be required and the air supply may then be omitted or disconnected.
- the air supply may then be omitted or disconnected.
- the spray gun includes a trigger mechanism to control dispensing of the liquid and, where required, the air supply to the spray nozzle for atomising the liquid.
- the trigger mechanism may actuate a member for opening/closing a passageway through the spray head for controlling flow of the liquid to the spray head.
- the member may comprise a needle member received in the passageway and operatively connected to the trigger mechanism so as to be moved from an advanced position closing the passageway to a retracted position opening the passageway when the trigger mechanism is actuated.
- the needle may have to be wiped clean when the spray head is removed but this is a simple operation and may be effected without the use of solvents.
- a spray head for attachment to a spray gun body, the spray head having a spray nozzle for dispensing liquid supplied to the spray head, wherein the spray head includes a body connectable to the spray gun body and is adapted for connection to a liquid reservoir such that liquid from the reservoir is delivered to the spray nozzle through the spray head body without passing through the spray gun body.
- the spray head body is releasably connected to the spray gun body.
- the spray head can be detached and thrown away after use.
- the amount of cleaning required on completion of spraying and/or when changing over the spray gun to spray another liquid may be reduced.
- the spray head may be employed with spray guns of the gravity feed, pressure feed or suction feed type.
- Existing spray guns having an inlet for connection to a liquid reservoir may be converted for use with the spray head by closing the inlet, for example with a blanking plug.
- an adaptor may be provided to connect the spray head body to the spray gun body.
- a reservoir for the liquid to be dispensed may be mounted on the spray head so as to be removable from the spray gun with the spray head.
- the reservoir may be releasably connected to the spray head and may be disposable or re-usable.
- the spray head and reservoir may be permanently joined together.
- the spray head may be adapted for atomising the dispensed liquid.
- the spray nozzle may be arranged to provide opposed inwardly directed air streams to mix with concentric streams of liquid and air emerging from the spray nozzle to atomise the liquid and create a spray.
- the atomisation parameters or spray pattern may be controlled by adjusting the inwardly directed air streams.
- a liquid delivery system for a spray gun comprising a spray head including a body provided with a spray nozzle and adapted for releasable connection to a spray gun body and a reservoir for a liquid to be dispensed, the reservoir being connected to the spray head such that liquid withdrawn from the reservoir in use is delivered to the spray nozzle through the spray head body without passing through the spray gun body.
- the spray head and reservoir could be "all-in-one".
- Figure 1 is a side view of a prior art gravity feed spray gun showing the component parts of the spray nozzle detached from the body of the spray gun;
- Figure 2 is a side view, partly sectioned, of the body of the spray gun shown in Figure 1 ;
- FIG 3 is a side view of a gravity feed spray gun embodying the present invention
- Figure 4 is a perspective view of the spray head and reservoir shown in Figure 3;
- Figure 5 is a perspective view of the spray head and lid of the reservoir shown in Figure 4;
- Figure 6 is an exploded isometric view of the spray head and lid shown in Figure 5;
- Figure 7 is a perspective view showing an alternative reservoir attached to the spray head shown in Figures 4 to 6;
- Figure 8 is a perspective view showing an alternative connection between the spray head and reservoir shown in Figure 7;
- FIG. 9 is a side view of a suction feed spray gun embodying the present invention.
- Figures 10 to 12 show alternative arrangements for supplying liquid to be sprayed to the spray head.
- the gun 1 comprises a body 2, a handle 3 that extends downwardly from the rear end of the body 2 and a spray nozzle 4 at the front end of the body 2.
- the spray gun 1 is manually operable by a trigger 5 that is pivotally mounted on the sides of the gun 1.
- a paint reservoir (not shown) is detachably secured to the gun 1 via an internally threaded inlet 7 on the top of the gun 1.
- the reservoir may have an externally threaded outlet for screwing directly into the inlet 7 or into an adaptor (not shown) screwed into the inlet 7.
- the reservoir may be of any known construction and provides a supply of paint to the spray nozzle 4 via an internal passageway 8 formed in the body 2 of the gun 1.
- the spray nozzle 4 comprises an inner component 11 and an outer component 12 that screws onto the front end of the body 2 of the gun 1 and retains the inner component 11.
- the inner component 11 has a through bore 13 terminating at the front end in a hole 10.
- the rear end of the bore 13 communicates with the passageway 8.
- the trigger 5 is connected to the rear end of a needle 9 that extends through the passageway 8 and is received in the bore 13 in an inoperative position of the trigger 5 to close the hole 10 and prevent escape of paint from the passageway 8.
- the front end of the inner component 11 is received in a central aperture (not shown ) in the outer component 12 and defines an annular opening concentric with the hole 10.
- the outer component 12 is provided with a pair of horns 17 that project forwardly from the spray nozzle 4non opposite sides of the hole 10.
- the horns 17 are provided with opposed inwardly directed apertures 17a.
- the spray gun 1 is connected to a source of compressed air (not shown) via a connector (not shown) at the lower end of the handle 3.
- the air is delivered to the spray nozzle 4 via internal passageways 14a,b,c in the handle 3 and body 2 of the gun 1 in response to actuation of the trigger 5.
- the flow of air is controlled by an on/off valve 15 operable by the trigger 5 and by flow regulators 6a,6b adjustable to set the flow rate by means of rotatable control knobs 16a,b.
- the trigger 5 is biased to the inoperative position in which the needle 9 closes spray nozzle 4 to prevent escape of paint from the hole 10 and the valve 15 is closed to cut-off the air supply to the spray nozzle 4.
- the needle 9 When the user pulls the trigger 5, the needle 9 is retracted to a position in which a tapered front end 9a of the needle 9 is received in the rear end of the bore 13 to open the spray nozzle 4. As a result, liquid flows from the passageway 8 through the bore 13 and emerges from the hole 10. At the same time, the valve 15 is opened to deliver air to the spray nozzle 4 where it emerges from the opening concentric with the hole 10 and from the opposed apertures 17a of the horns 17 on opposite sides of the spray nozzle 4.
- the horns 17 direct the air-flow inwardly where it mixes with and atomises the concentric paint/air streams emerging from the spray nozzle 4 to form a spray.
- the rate of discharge of the paint and the flow of air is controlled by the displacement of the trigger 5 from the inoperative position under the control of the user to produce the desired spray.
- the reservoir can be detached from the spray gun 1 for cleaning or disposal according to the type of reservoir employed.
- the spray gun 1 then has to be cleaned to remove all traces of paint from the internal passageway 8 connecting the spray nozzle 4 to the inlet 7 as well as from the needle 9 within the passageway 8 and the spray nozzle 4 itself.
- FIG. 3 to 6 of the accompanying drawings there is shown a gravity feed spray gun according to a first embodiment of the present invention in which like reference numerals in the series 100 are used for convenience to indicate parts corresponding to the spray gun shown in Figures 1 and 2.
- the gravity feed spray gun 101 has a body 102, a handle 103 extending downwardly from the body 102 and a trigger 105 pivotally mounted on the body 102 for controlling operation of the spray gun 101 as described later herein.
- a removable spray head 150 is attached to the body 102 of the gun 101 by a bayonet type connection that allows the spray head 150 to be detached from the gun 101.
- the spray head 150 is made of lightweight plastics material, for example by moulding, but it will be understood other materials may be employed.
- the spray head 150 has a socket 151 ( Figures 4 to 6) at the rear end and a spray nozzle 153 at the front end.
- a paint reservoir 156 is mounted on the spray head 150 to connect an outlet 155 to an inlet 154 between the front and rear ends for supplying paint to the spray nozzle 153 as described later herein.
- the wall of the socket 151 is provided with a pair of opposed bayonet grooves 152 (one only shown) comprising an axial guide portion 152a terminating at the inner end in a circumferential retention portion 152b.
- the front end of the body 102 of the gun 101 is provided with a pair of outwardly projecting lugs (not shown) that are engageable in the grooves 152 with a push-twist action to secure the spray head 150 to the spray gun 101. It will be understood that any other type of releasable connection may be provided between the spray head 150 and the gun 101.
- the spray head 150 comprises a hollow tubular body 158, an insert 159, and a pair of air horn members 160,161.
- the socket 151 is provided at the rear end of the body 158 and the insert 159 is a push-fit in the body 158 from the rear end.
- An annular flange 162 at the rear end of the insert 159 is engageable with the base of the socket 151 to locate axially the insert 159 in the body 158.
- the insert 159 has an axial through bore 157 in which a tapered front end of a needle (not shown) controlling flow of paint from the reservoir 156 is received.
- the bore 157 communicates via a radial port (not shown) intermediate the ends of the insert 159 with a radial inlet tube 163 connected to the body 158.
- the insert 159 and body 158 are provided with co-operating formations (not shown) to locate the insert 159 in the required angular orientation to align the radial port with the inlet tube 163.
- the inlet tube 163 is connected to an outlet tube 164 from the paint reservoir 156 for supplying paint to the spray nozzle 150.
- the inlet tube l " 63 has a radial lug 165 adjacent to the distal end that is received in a first axial slot 166 in the wall of the outlet tube 164 to locate angularly the reservoir 156 relative to the spray head 150.
- a retainer ring 167 seats on the outer end of the outlet tube 164 and has an axial leg 168 received in a second axial slot 169 in the wall of the outlet tube 164 angularly offset from the first slot 166.
- the retainer ring 167 has a central hole 170 and a radial slot 171 that allows the inlet tube 163 to be passed through the ring 167 prior to locating the ring 167 on the outlet tube 164.
- the radial slot 171 is angularly offset relative to the first axial slot 166 when the leg 168 is received in the second axial slot
- the inlet tube 163 is rotated to a position in which the lug 165 is offset relative to the radial slot 171 to enable the leg 168 to be located in the second axial slot 169.
- the reservoir 156 is located and retained in the spray head 150 in the required angular orientation.
- the trigger 105 is connected to the rear end of the needle (not shown) received in the through bore 157 of the insert.
- the needle is movable axially of the bore 157 between an advanced position in which it covers the radial port and a retracted position in which it is clear of the radial port in response to actuation of the trigger 105.
- the horn members 160, 161 are of similar semi-cylindrical shape that fit onto and surround the front end of the body 158 of the spray head 150.
- the members 160, 161 have external axial ribs 172 that provide horns 173 on opposite sides the spray nozzle 153.
- the ribs 172 are formed with internal air passageways 174 that communicate at one end with opposed apertures 175 in the horns 173. At the other end, the passageways 174 are formed with inlet holes 176 (one only shown) that open into an air chamber formed between the members 160,161 and the body 158.
- the rear end of the insert 159 is in communication with an air supply passageway (not shown) in the spray gun body 102.
- the insert 159 has radial ports 177 (one only shown) through which air can pass into the space between the insert 159 and the body 158 within the spray head 150 to emerge from an annular opening 178 ( Figures 4 and 5).
- the opening 178 is concentric with a hole 157a at the front end of the bore 157 from which the liquid emerges.
- the body 158 has radial ports 179 that open into the air chamber and allow air to pass along the passageways 174 in the ribs 172 and emerge from the apertures 175 in the horns 173.
- a compressed air line (not shown) is connected to the lower end of the handle 103 and the trigger 105 is operable to actuate an on/off valve (not shown) in the spray gun body 102 to control the air supply to the spray head 150.
- the needle When the user pulls the trigger 105, the needle is retracted to open the bore 157 in the insert 159 and allow paint supplied to the spray head 150 from the reservoir 156 to emerge from the hole 157a in the spray nozzle 153.
- the trigger 105 actuates the on/off valve to deliver air to the spray head 150 via internal passageways (not shown) in the spray gun body 102.
- the air passes through the spray head 150 and emerges from opening 178 concentric with the hole 157a and from the apertures 175 in the horns 173.
- the horns 173 direct the air inwards where it mixes with the concentric paint/air streams emerging from he front end of the nozzle 153 and causes the paint to atomise and form a spray.
- the horns 173 may be detachably secured to the front end of the spray head body 158 by any suitable means.
- the members 160,161 may clip- on the spray head body 158.
- the spray head 150 can be adapted according to the desired atomisation parameters or spray pattern of the paint to be sprayed by selecting and fitting the appropriate pair of members 160,161 to vary the size and/or position of the horns 173 to control the flow and/or direction of the air emerging from the horns for mixing with the paint/air streams emerging from the nozzle 153.
- the paint flows directly from the reservoir 156 to the spray nozzle 153 through the spray head 150 without passing through the spray gun body 102.
- the spray head 150 and reservoir 156 can be detached from the spray gun body 102, the needle wiped clean and a new spray head/reservoir combination attached to the spray gun body 102. In this way, the amount of cleaning required is reduced and the spray gun 101 can be quickly changed over to spray another liquid with a minimum disruption.
- the reservoir 156 comprises an open-topped container 181 closed by a lid 182.
- the container 181 is made of plastics and has flexible walls so as to be collapsible in use.
- the lid 182 is also made of plastics and is sufficiently rigid to maintain its shape in use.
- the lid is of frusto-conical shape and the outlet tube 164 is provided at the apex of the lid 182 for connection to the inlet tube 163 of the spray head 150.
- the marginal edge of the container 181 is permanently secured to the rim of the lid 182, for example by adhesive or by welding.
- the reservoir 156 may be supplied pre-filled with paint or other liquid to be dispensed and a removable closure such as a screw cap (not shown) attached to the outlet tube 164.
- the lid 182 could be provided with a filler opening (not shown) separate from the outlet tube and a removable closure such as a screw cap (not shown).
- the reservoir 156 may be supplied empty and filled by the end user with paint or other liquid to be sprayed.
- the filler opening may also permit re-filling of the reservoir 156 and be arranged so this can be carried out while the reservoir 156 is attached to the spray head 150 on the spray gun 101.
- a filter (not shown) could be incorporated in the underside of the lid 182 to screen out contaminant particles before the paint reaches the spray nozzle 153.
- the container 181 collapses inwardly as paint is withdrawn from the reservoir 156 and, on completion of spraying, the spray head 150 and reservoir 156 can be removed from the spray gun 101. Any paint remaining in the reservoir 156 can be stored for a short period of time and the spray head 150 re-attached to the spray gun 101 to use the paint. When the reservoir 156 is empty or any remaining paint is not required, the spray head 150 and reservoir 156 can be discarded as an assembly or separately. In this way, contaminated parts of the paint delivery system are disposable after use.
- the lid 282 is separate from the collapsible container and the reservoir 256 includes an outer pot 290 in which the flexible container is received.
- the lid 282 is secured to the flexible container by a collar 291 that fits over the marginal edge of the lid 282 and screws onto the upper end of the outer pot 290 to clamp and seal the lid 282 relative to the container.
- the flexible container provides a lining for the outer pot 290 and, after use, the lid 282 and flexible container can be discarded and the outer pot 290 and collar 291 re-used with a new clean lid and flexible container.
- the flexible container collapses as paint is withdrawn from the reservoir 256 and the outer pot 290 is provided with an air hole 292 in the base to prevent a vacuum forming within the pot 290 to allow the container to collapse.
- the outer pot 290 and flexible container may be transparent or translucent to allow the contents to be inspected visually and scale markings provided on the pot 290 to indicate the volume of the contents. With this arrangement, the flexible container can be supported in the outer pot and the paint or other liquid added to and mixed in the container prior to attaching the lid 282.
- FIG 8 there is shown an alternative arrangement for releasably securing the reservoir to the spray head.
- like reference numerals in the series 300 are used to indicate parts corresponding to the previous embodiments.
- the lid 382 of the reservoir 356 has an outlet tube 364 that is a push fit in the inlet tube 363 of the spray head 350 and is sealed by annular ribs 394.
- the inlet tube 363 has an external flange 395 at the distal end and the lid 382 has a pair of hook members 396 engageable with the flange 395 to secure and retain the reservoir 356 on the spray head 350.
- the flange 395 has a pair of opposed recesses 397 leading to flats 398 via cam lobes 399.
- the hook members 396 are aligned with the recesses 397 so as to pass the flange 395 when the reservoir 356 is pushed onto the spray head 350. The reservoir 356 is then rotated to cause the hook members
- FIG. 9 a suction feed spray gun according to a second embodiment of the present invention is shown in which like reference numerals in the series 400 are used to indicate parts corresponding to the first embodiment.
- the construction of the spray head 450 and reservoir 456 of this embodiment is generally similar to the first embodiment in which the paint contaminated spray head 450 and reservoir 456 are disposable and can be thrown away after use to reduce the amount of cleaning of the spray gun.
- the operation of this embodiment will be apparent to those skilled in the art familiar with suction feed spray guns without further description.
- the spray head 550 is shown connected to a re-usable paint reservoir 540.
- the spray head 550 has an internally threaded inlet connector tube 541 and the reservoir 540 is a rigid pot 542 having an outlet tube 543 with an external screw thread 544 engageable with the internal screw thread of the inlet connector tube 541.
- the spray head 550 is separated from the reservoir 540 and discarded, and the reservoir 540 is cleaned for re-use with another spray head.
- the overall amount of cleaning required may still be less than with some existing systems in which the paint or other liquid is delivered to the spray head through an internal passageway of the spray gun body that requires cleaning.
- the spray head 550 is shown connected via a flexible line 545 to a remote paint reservoir (not shown).
- the line 545 has a connector 546 screwed into the inlet connector tube 541 of the spray head 550.
- a bayonet or tapered push-fit connection could be provided.
- the line 545 can be detached from the spray head 550 which can be detached from the spray gun and thrown away. Again, the amount of cleaning of the spray gun is reduced and the line 545 can be connected to another spray head as desired.
- the remote reservoir may be a bulk storage container for a large volume of paint that can be used for several spraying operations and either thrown away after use or cleaned for re-filling with more paint.
- the spray head 550 is shown connected to a collapsible paint reservoir 547 in the form of a pouch or bag 548.
- the bag 548 has a threaded connector 549 screwed into the inlet connector tube 541 of the spray head 550.
- the bag 548 may be pre-filled with paint and sealed by any suitable closure system until it is desired to attach the reservoir 542 to the spray head 550.
- the end user can purchase pre-packaged paint reservoirs 547 filled with paint for use with the spray head 550 and, after use, the paint contaminated spray head 550 and reservoir 547 can be discarded such that the amount of cleaning of the spray gun is reduced.
- This arrangement may be suitable for supply of paint that is stable under normal storage conditions until required for use.
- the reservoir may be made of any suitable material that is flexible and tear resistant, for example single or multiple sheets of metal foil or plastics.
- the present invention provides a paint delivery system for a spray gun that can reduce the amount of cleaning of the spray gun on completion of spraying or when changing over the spray gun to spray a different liquid.
- the liquid is delivered to the spray nozzle through the spray head without passing through the spray gun body.
- contamination of the spray gun body by contact with the liquid being sprayed can be reduced so that cleaning of the spray gun is simplified and the amount of any solvents or other cleaning materials employed may be reduced, especially where both the spray head paint reservoir are disposable.
- the exemplary embodiments described herein are intended to illustrate the diverse range and application of the invention and that features of the embodiments may be employed separately or in combination with any other features of the same or different embodiments.
- the needle employed to control dispense of the liquid from the spray nozzle may be omitted and replaced by any other suitable means for preventing escape of the liquid when the spray gun is not in use.
- Such means may be incorporated as part of the spray head and/or reservoir so as to be disposable therewith. In this way, it may be possible to eliminate completely any paint contaminated parts requiring cleaning when changing over the spray head.
- Existing spray guns such as shown in Figures 1 and 2 may be converted for use with the spray head of the present invention.
- the inlet in the spray gun body for connection to a paint reservoir could be closed, for example with a blanking plug, and an adaptor with bayonet lugs screwed onto the front end of the spray gun body for attaching the spray head.
- the socket of the spray head body could be provided with an internal screw thread to enable the spray head to be screwed on the spray gun body.
Landscapes
- Nozzles (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Catching Or Destruction (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0224697 | 2002-10-24 | ||
GBGB0224697.3A GB0224697D0 (en) | 2002-10-24 | 2002-10-24 | Easy clean spray gun |
PCT/US2003/032671 WO2004037432A1 (en) | 2002-10-24 | 2003-10-13 | Easy clean spray gun |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1554051A1 true EP1554051A1 (de) | 2005-07-20 |
EP1554051B1 EP1554051B1 (de) | 2006-10-04 |
Family
ID=9946454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03773277A Expired - Lifetime EP1554051B1 (de) | 2002-10-24 | 2003-10-13 | Leicht zu reinigende sprühpistole |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP1554051B1 (de) |
JP (1) | JP4611743B2 (de) |
KR (1) | KR101098129B1 (de) |
CN (1) | CN100528373C (de) |
AT (1) | ATE341400T1 (de) |
AU (1) | AU2003279971B2 (de) |
BR (1) | BR0315541B1 (de) |
CA (1) | CA2503034C (de) |
DE (1) | DE60308886T2 (de) |
ES (1) | ES2273050T3 (de) |
GB (1) | GB0224697D0 (de) |
NO (1) | NO20052440L (de) |
RU (1) | RU2380169C2 (de) |
WO (1) | WO2004037432A1 (de) |
Cited By (6)
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US9751100B2 (en) | 2011-02-09 | 2017-09-05 | 3M Innovative Properties Company | Nozzle tips and spray head assemblies for liquid spray guns |
US9802211B2 (en) | 2011-10-12 | 2017-10-31 | 3M Innovative Properties Company | Spray head assemblies for liquid spray guns |
US9802213B2 (en) | 2012-03-06 | 2017-10-31 | 3M Innovative Properties Company | Spray gun having internal boost passageway |
US10493473B2 (en) | 2013-07-15 | 2019-12-03 | 3M Innovative Properties Company | Air caps with face geometry inserts for liquid spray guns |
WO2020109826A1 (en) * | 2018-11-30 | 2020-06-04 | Labman Automation Limited | Spray head with radially separable segments |
US11167298B2 (en) | 2012-03-23 | 2021-11-09 | 3M Innovative Properties Company | Spray gun barrel with inseparable nozzle |
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US7086549B2 (en) | 2004-01-16 | 2006-08-08 | Illinois Tool Works Inc. | Fluid supply assembly |
US7165732B2 (en) | 2004-01-16 | 2007-01-23 | Illinois Tool Works Inc. | Adapter assembly for a fluid supply assembly |
US7665672B2 (en) | 2004-01-16 | 2010-02-23 | Illinois Tool Works Inc. | Antistatic paint cup |
US7766250B2 (en) | 2004-06-01 | 2010-08-03 | Illinois Tool Works Inc. | Antistatic paint cup |
US7757972B2 (en) | 2004-06-03 | 2010-07-20 | Illinois Tool Works Inc. | Conversion adapter for a fluid supply assembly |
US7353964B2 (en) | 2004-06-10 | 2008-04-08 | Illinois Tool Works Inc. | Fluid supply assembly |
JP4675593B2 (ja) * | 2004-07-26 | 2011-04-27 | 株式会社資生堂 | 理美容機器 |
PL2450108T3 (pl) | 2004-12-16 | 2017-04-28 | Saint-Gobain Abrasives, Inc. | Zespół zbiornika dostarczającego ciecz i wkładki do pistoletów natryskowych |
DE102005038162A1 (de) * | 2005-08-12 | 2007-02-15 | Kriesmair, Bernd, Dipl.-Ing. | Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten |
DK2029285T3 (da) | 2006-06-20 | 2013-03-11 | Saint Gobain Abrasives Inc | Væsketilførselsanordning |
US11040360B2 (en) | 2006-06-20 | 2021-06-22 | Saint-Gobain Abrasives, Inc. | Liquid supply assembly |
DE102007053855A1 (de) * | 2007-02-27 | 2008-09-04 | Martin Ruda | Farbspritzpistole mit einem Grundkörper, auswechselbare Farbleiteinrichtung und Anordnung aus einer Farbspritzpistole, einer auswechselbaren Farbleiteinrichtung und einem Farbspritzpistolenbecher |
US8727389B2 (en) | 2007-05-04 | 2014-05-20 | Worthington Torch, Llc | Gas appliance |
JP5529896B2 (ja) | 2009-01-26 | 2014-06-25 | スリーエム イノベイティブ プロパティズ カンパニー | 液体スプレーガン、スプレーガンプラットフォーム、及びスプレーヘッドアセンブリ |
ES2509517T3 (es) * | 2010-09-14 | 2014-10-17 | J. Wagner Ag | Filtro para pistolas pulverizadoras destinado al filtrado de líquidos y su utilización |
US9335198B2 (en) | 2011-05-06 | 2016-05-10 | Saint-Gobain Abrasives, Inc. | Method of using a paint cup assembly |
CA2838949C (en) | 2011-06-30 | 2019-04-02 | Saint-Gobain Abrasives, Inc. | Paint cup assembly |
MX343152B (es) | 2011-07-28 | 2016-10-26 | 3M Innovative Properties Co | Montaje de boquilla rociadora con tapa/tobera de aire integrada para pistola pulverizadora de liquido. |
WO2013101946A1 (en) | 2011-12-30 | 2013-07-04 | Saint-Gobain Abrasives, Inc. | Convertible paint cup assembly with air inlet valve |
WO2013161421A1 (ja) * | 2012-04-25 | 2013-10-31 | 株式会社タカギ | 液剤希釈散水装置 |
DE102012018125A1 (de) * | 2012-09-13 | 2014-03-13 | Uwe Dederichs | Injektordüse und Adaptereinheit für eine Injektordüse |
MX2015013126A (es) * | 2013-03-15 | 2016-01-08 | 3M Innovative Properties Co | Unidad de suministro de liquidos asistida por presion. |
CN107438650B (zh) * | 2015-02-13 | 2020-08-04 | 凯密特尔有限责任公司 | 基于巯基封端的基体聚合物/环氧化合物的密封剂以及借助光潜催化剂的硬化方法 |
JP6727518B2 (ja) * | 2016-04-20 | 2020-07-22 | リョーエイ株式会社 | スプレー装置および塗布液の沈殿防止方法 |
CN106111379A (zh) * | 2016-08-31 | 2016-11-16 | 宁波浩盛气动机械有限公司 | 一种液体喷枪 |
IT201900007353A1 (it) * | 2019-05-27 | 2020-11-27 | Dromont S P A | Testa erogatrice autopulente per una macchina dosatrice per l'erogazione di prodotti fluidi quali coloranti per vernici o simili |
KR102355756B1 (ko) | 2020-07-15 | 2022-01-25 | 이경희 | 스프레이건 |
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DE401944C (de) * | 1923-03-18 | 1924-09-10 | Leipziger Tangier Manier Alexa | Spritzapparat |
DE485540C (de) * | 1928-02-17 | 1929-11-01 | Karl Ludwig Dipl Ing | Spritzpistole |
SU172206A1 (ru) * | 1963-01-29 | 1965-07-26 | В. Ф. Попов | Пневматический пистолет-распылитель вязких жидкостей, красок и паст |
JPS5867555U (ja) * | 1981-10-31 | 1983-05-09 | 花岡 克之 | 噴霧装置 |
JPH062760Y2 (ja) * | 1986-09-02 | 1994-01-26 | 岩田塗装機工業株式会社 | 分割可能なスプレ−ガン |
US4817872A (en) * | 1987-05-22 | 1989-04-04 | Mattson Roy D | Adjustable fluid spray gun |
JPS6425358U (de) * | 1987-08-03 | 1989-02-13 | ||
US4936511A (en) * | 1988-11-28 | 1990-06-26 | Minnesota Mining And Manufacturing Company | Spray gun with disposable liquid handling portion |
JPH0330852A (ja) * | 1989-06-26 | 1991-02-08 | Minari:Kk | 塗装ガン |
JPH0734880B2 (ja) * | 1992-02-03 | 1995-04-19 | 有限会社ミナリ | 塗装ガン |
US5826795A (en) * | 1996-08-19 | 1998-10-27 | Minnesota Mining And Manufacturing Company | Spray assembly |
CN2370967Y (zh) * | 1999-06-12 | 2000-03-29 | 汤明长 | 一种喷枪 |
JP2001276676A (ja) * | 2000-03-30 | 2001-10-09 | Hosoi Toso Kogyo Kk | エアースプレーガン |
CN2428222Y (zh) * | 2000-05-25 | 2001-05-02 | 周武巧 | 喷砂喷枪 |
-
2002
- 2002-10-24 GB GBGB0224697.3A patent/GB0224697D0/en not_active Ceased
-
2003
- 2003-10-13 JP JP2004546875A patent/JP4611743B2/ja not_active Expired - Lifetime
- 2003-10-13 DE DE60308886T patent/DE60308886T2/de not_active Expired - Lifetime
- 2003-10-13 AT AT03773277T patent/ATE341400T1/de not_active IP Right Cessation
- 2003-10-13 CN CNB2003801018591A patent/CN100528373C/zh not_active Expired - Fee Related
- 2003-10-13 AU AU2003279971A patent/AU2003279971B2/en not_active Ceased
- 2003-10-13 RU RU2005110950/11A patent/RU2380169C2/ru not_active IP Right Cessation
- 2003-10-13 EP EP03773277A patent/EP1554051B1/de not_active Expired - Lifetime
- 2003-10-13 KR KR1020057006916A patent/KR101098129B1/ko not_active IP Right Cessation
- 2003-10-13 ES ES03773277T patent/ES2273050T3/es not_active Expired - Lifetime
- 2003-10-13 BR BRPI0315541-2A patent/BR0315541B1/pt not_active IP Right Cessation
- 2003-10-13 WO PCT/US2003/032671 patent/WO2004037432A1/en active IP Right Grant
- 2003-10-13 CA CA2503034A patent/CA2503034C/en not_active Expired - Lifetime
-
2005
- 2005-05-20 NO NO20052440A patent/NO20052440L/no unknown
Non-Patent Citations (1)
Title |
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See references of WO2004037432A1 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9751100B2 (en) | 2011-02-09 | 2017-09-05 | 3M Innovative Properties Company | Nozzle tips and spray head assemblies for liquid spray guns |
US9802211B2 (en) | 2011-10-12 | 2017-10-31 | 3M Innovative Properties Company | Spray head assemblies for liquid spray guns |
US9802213B2 (en) | 2012-03-06 | 2017-10-31 | 3M Innovative Properties Company | Spray gun having internal boost passageway |
US11167298B2 (en) | 2012-03-23 | 2021-11-09 | 3M Innovative Properties Company | Spray gun barrel with inseparable nozzle |
US10493473B2 (en) | 2013-07-15 | 2019-12-03 | 3M Innovative Properties Company | Air caps with face geometry inserts for liquid spray guns |
WO2020109826A1 (en) * | 2018-11-30 | 2020-06-04 | Labman Automation Limited | Spray head with radially separable segments |
GB2580525B (en) * | 2018-11-30 | 2021-08-11 | Labman Automation Ltd | Spray head |
Also Published As
Publication number | Publication date |
---|---|
GB0224697D0 (en) | 2002-12-04 |
DE60308886T2 (de) | 2007-04-26 |
NO20052440L (no) | 2005-07-15 |
EP1554051B1 (de) | 2006-10-04 |
DE60308886D1 (de) | 2006-11-16 |
ES2273050T3 (es) | 2007-05-01 |
WO2004037432A1 (en) | 2004-05-06 |
CN101027134A (zh) | 2007-08-29 |
RU2380169C2 (ru) | 2010-01-27 |
RU2005110950A (ru) | 2006-02-10 |
BR0315541A (pt) | 2005-08-23 |
JP2006518268A (ja) | 2006-08-10 |
AU2003279971B2 (en) | 2008-04-03 |
AU2003279971A1 (en) | 2004-05-13 |
JP4611743B2 (ja) | 2011-01-12 |
CN100528373C (zh) | 2009-08-19 |
BR0315541B1 (pt) | 2014-01-21 |
KR101098129B1 (ko) | 2011-12-26 |
CA2503034C (en) | 2011-10-04 |
NO20052440D0 (no) | 2005-05-20 |
CA2503034A1 (en) | 2004-05-06 |
ATE341400T1 (de) | 2006-10-15 |
KR20050055777A (ko) | 2005-06-13 |
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