WO2007003245A1 - Reservoir de pistolet de pulverisation dote d’un orifice d’entree etanche aux liquides - Google Patents

Reservoir de pistolet de pulverisation dote d’un orifice d’entree etanche aux liquides Download PDF

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Publication number
WO2007003245A1
WO2007003245A1 PCT/EP2006/004860 EP2006004860W WO2007003245A1 WO 2007003245 A1 WO2007003245 A1 WO 2007003245A1 EP 2006004860 W EP2006004860 W EP 2006004860W WO 2007003245 A1 WO2007003245 A1 WO 2007003245A1
Authority
WO
WIPO (PCT)
Prior art keywords
spray gun
liquid
container
reservoir
air
Prior art date
Application number
PCT/EP2006/004860
Other languages
English (en)
Inventor
Alain Marcel Wambeke
Original Assignee
N.V. Omniform S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by N.V. Omniform S.A. filed Critical N.V. Omniform S.A.
Publication of WO2007003245A1 publication Critical patent/WO2007003245A1/fr

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
    • 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
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/40—Filters located upstream of the spraying outlets

Definitions

  • the present invention relates to a spray gun reservoir. More in particular, the present invention relates to a liquid reservoir for mounting on a spray gun, a spray gun assembly provided with a liquid reservoir, and a method of providing such an assembly.
  • Spray guns having reservoirs for containing the liquid to be sprayed are well known. Such reservoirs are typically mounted on top of the spray gun using a hollow coupling element through which the liquid can flow. The position on top of the spray gun ensures that gravity assists the flow of the liquid.
  • the liquid such as paint or herbicide
  • the liquid is typically first mixed in a blending cup or other suitable container before being poured into the spray gun reservoir.
  • the reservoir is closed by a lid and is then mounted on the spray gun.
  • the amount of liquid in the reservoir steadily decreases, causing a lowered air pressure (vacuum) in the reservoir which would hinder the flow of liquid.
  • the known reservoirs are provided with a vent opening or air hole which allows air to be drawn from the outside.
  • the spray gun and the reservoir have to be cleansed.
  • a disposable liner in the reservoir.
  • the liner which contains the liquid, prevents the liquid coming into contact with the reservoir.
  • German Patent 729 382 discloses a spray gun reservoir in which a porous disc is placed between the lid and the rim of the container. This known arrangement allows air to be drawn in through the small gap and the porous disc located between the two reservoir parts. However, the porous disc constitutes an additional part, which makes the spray gun reservoir more expensive and less easy to use.
  • German Patent 731 598 discloses a spray gun reservoir in which an air vent is provided in the lid. This air vent is closed off by a porous cap. Air is apparently drawn in through any leaks that may exist between the porous cap and the lid, and presumably also through the porous cap itself. This known arrangement therefore requires a porous element to draw in air. In addition, this known spray gun reservoir involves an air vent mechanism which adds to the complexity of the reservoir. It is therefore an object of the present invention to overcome these and other problems of the Prior Art and to provide a spray gun assembly which may be held in various positions without spilling liquid.
  • the present invention provides a liquid reservoir assembly for a spray gun, the assembly comprising a first part and a second part which enclose a space for holding liquid when their rims are brought together, wherein the second part has an opening for passing the liquid to the spray gun, characterised in that the first part has closed surfaces, and in that the rims provide a liquid-tight seal but not an air-tight seal without involving porous elements.
  • the reservoir of the present invention air is supplied to the interior through "leakage" between the reservoir parts and no vent opening or vent mechanism is necessary.
  • the reservoir assembly (with or without the spray gun attached) may be held in any position without spilling liquid.
  • the absence of a vent opening or vent mechanism lowers the cost of the reservoir.
  • the reservoir assembly can be held in virtually any position, including upside-down, without spilling fluid.
  • the second part will preferably have no openings other than the one (or ones) for passing the liquid to the spray gun.
  • At least one rim is provided with one or more channels to enhance the passage of air between the rims. These channels or grooves may extend substantially perpendicularly to the rim, thus spanning the shortest distance between the interior and the exterior of the reservoir. Non-perpendicular directions of the channels are, however, also possible.
  • the channels which are preferably arranged in the rim of the second part only, may be very shallow and may have a depth of less than 1.0 mm, possibly only 0.5 mm, while their width may, for example, be approximately 1.5 or 2.0 mm. It is noted that these channels do not present additional openings in either reservoir part, they only locally widen the minute gap that may exist between the rims of the parts.
  • channels Although only a single channel may be provided, it is preferred that two, three or more channels are provided on a rim. Those channels are preferably evenly spaced around the rim. Instead of or in addition to channels, other elements for ensuring a minimum air flow may be provided, such as protrusions.
  • one of the parts may be provided with a substantially U-shaped groove while the other part (preferably the first part) is provided with a substantially U-shaped rim which fits into the groove.
  • Such sealing arrangements are well known in the art. No additional components are necessary, provided the substantially U-shaped elements provide a good and close fit.
  • the first part may be provided with the substantially U- shaped groove while the second part is provided with the substantially U-shaped rim.
  • the above-mentioned channels may advantageously be arranged in said U-shaped groove.
  • the parts may be provided with mating screw threads which allow a minute passage of air.
  • the first part of the liquid reservoir of the present invention is preferably constituted by a container while the second part is constituted by a lid for the container. That is, the first part may have a circumferentially closed wall surface extending in a longitudinal direction from an end surface, thus defining an interior of the container. This allows the first part to be used as a mixing (blending) cup for mixing paint or other substances prior to spraying.
  • the reservoir is then closed off by placing the second part (that is, the lid) on the first part (that is, the container), and is turned upside down for mounting on the spray gun.
  • the second part it is also possible for the second part to form a container, as disclosed in WO 98/32539 mentioned above.
  • the container of the present invention preferably has a substantially circular cross-section, although other cross-sections are also possible, for example substantially rectangular (e.g. square), oval, hexagonal or octagonal.
  • the first part is preferably wider at its opening than at its closed end, although this is not essential. It is preferred that the second part is funnel-shaped. This assists the flow of the liquid, in particular when the reservoir is almost empty. In alternative embodiments, however, the second part may be substantially planar.
  • the liquid reservoir assembly of the present invention may further comprise a filter.
  • a filter which may serve to remove particles from the liquid and which may be constituted by a mesh mounted in a holder, is preferably arranged in the second part. However, the filter may also be arranged in the first part. The filter is preferably removably mounted in one of said parts.
  • the liquid reservoir assembly of the present invention may be made of a plastic material, preferably a substantially transparent plastic material.
  • Suitable plastic materials are polypropylene, polyethylene and polyamide, although other materials may also be used. It is preferred that the material has a certain resilience.
  • the liquid reservoir assembly of the present invention may further comprise a coupling member for coupling the reservoir and the spray gun.
  • the coupling member may be made of metal or plastic, and may be provided with a suitable screw thread, a snap fit arrangement, or other coupling means.
  • the present invention also provides a spray gun assembly comprising a spray gun and a liquid reservoir assembly as defined above, and a second part for use in the liquid reservoir assembly as defined above.
  • the present invention further provides a kit-of-parts for forming a liquid reservoir assembly or a spray gun assembly as defined above.
  • the present invention additionally provides a method of using a spray gun, the method comprising the steps of:
  • first and second steps are not essential and may be reversed. It will be understood that a suitable opening is made in the container lid for passing liquid to the spray gun, and that suitable coupling means may be provided for coupling the lid and the spray gun.
  • Fig. 1 schematically shows, in perspective, a spray gun assembly according to the present invention.
  • Fig. 2 schematically shows, in a cross-sectional view, an embodiment of a spray gun reservoir assembly according to the present invention.
  • Fig. 3 schematically shows, in a cross-sectional view, a preferred embodiment of a second part according to the present invention.
  • Fig. 4 schematically shows, in a cross-sectional view, an edge section of the second part of Fig. 2 in more detail.
  • the spray gun assembly shown merely by way of non-limiting example in Fig. 1 comprises a spray gun 10 and a reservoir assembly consisting of a first part 1 and a second part 2. It is noted that in Fig. 1 the spray gun assembly is shown in the position in which it is assembled, whereas in use the position of the spray gun, the positions of the first part and the second part would be reversed. Accordingly, the second part 2 (which is shown above the first part 1) is in use located below the first part 1, forming the base of the reservoir assembly. Similarly, the first part 1 is in use located above the second part 2.
  • the spray gun 10 may be a conventional, commercially available spray gun.
  • the reservoir assembly is novel and has advantageous properties which will be later explained with reference to Fig. 2.
  • the first part 1 of the reservoir assembly is constituted by a container, such as a mixing (blending) cup.
  • the container of Fig. 1 has a substantially circular cross-section, but the invention is not limited to this particular cross-section or shape. Markings may be present on the container to measure quantities of liquids to be mixed and/or sprayed.
  • the container 1 of Fig. 1 has no air vent opening and its wall surfaces are closed, the only opening of the container being the access opening at one end, which opening is to be closed off by the second part or lid 2. As the container has no opening in its other end or side wall(s), it can be used as a mixing cup.
  • a Prior Art reservoir provided with a vent opening is not suitable for use as mixing cup.
  • the second part 2 shown in Fig. 1 has a funnel-shape to facilitate the flow of liquid from the reservoir assembly to the spray gun through the opening 3.
  • the second part 2 which serves as a lid for the container (first part) 1, may have suitable coupling means for coupling with the spray gun, such as a screw thread or a bayonet coupling arrangement. Additional coupling means, which may involve a connecting tube, may be mounted on the second part 2 but are not essential.
  • suitable coupling means for coupling with the spray gun, such as a screw thread or a bayonet coupling arrangement.
  • Additional coupling means which may involve a connecting tube, may be mounted on the second part 2 but are not essential.
  • Those skilled in the Art will be capable of selecting or designing coupling members suitable for a particular spray gun.
  • this embodiment is particularly advantageous in that the first part (container) 1 can be used as a mixing cup into the liquid(s) to be sprayed may be poured.
  • the spray gun (which may be connected to a source of compressed gas, for example compressed air) is mounted on the second part (lid) 2.
  • the container 1 is closed off by the second part (lid) 2, forming a closed reservoir assembly.
  • the resulting spray gun assembly is then ready for use.
  • the reservoir assembly of Fig. 1 does not include a liner, and that the container 1 is preferably disposable. In this way, a minimum number of parts is required while the cleansing of the spray gun assembly is made easy.
  • FIG. 2 An embodiment of both the first part (container) 1 and the second part (lid) 2 is shown in more detail in Fig. 2.
  • the container 1 is shown to have a substantially U- shaped rim or edge 5 which fits into the corresponding U-shaped rim 4 of the lid 2.
  • These matching elements 4 and 5 form a seal when brought together. However, as discussed later in more detail, this seal is imperfect.
  • the container rim 5 is supported by support elements 6 which may be located along the perimeter of the container at a spacing of, for example, 60 degrees.
  • the support elements 6 and the edge 5 are preferably integral with the container 1.
  • the lid 2 is substantially planar, in contrast to the lid (base member) 2 of Figs. 1 and 3.
  • the lid 2 may be a normal container lid in which a hole 3 is made for use in a spray gun assembly.
  • the container (first part) 1 has no vent opening, which allows the container to be used as a mixing cup or storage container.
  • Prior Art spray gun reservoirs have a vent opening as it is believed that such an opening is indispensable. Air has to be drawn into the reservoir to compensate for the outflow of liquid.
  • a vent opening may be omitted as air may be drawn in through the seal constituted by the lid rim 4 and the container edge 5.
  • the seal provided by the matching sealing elements (the rim 4 and the edge 5 in the embodiment shown) is therefore not air-tight.
  • this seal is water-tight (in general: liquid-tight), in particular as in use the pressure in the container 1 will be lower than the outside pressure.
  • the container edge 5 and the lid rim 4 are both shown to be inversely U- shaped in Fig. 2. As shown in more detail in Fig. 4, the (inversely) U-shaped rim 4 of the lid (second part) 2 may advantageously be provided with an inner transverse ledge 8 which improves the "snap" action of the seal. This ledge 8 can also be used in the embodiment of Fig. 3. It will be understood that the positions of the container edge 5 and the lid rim
  • a suitable sealing arrangement could comprise gel, in particular gel capable of passing small quantities of air.
  • Fig. 3a shows the second part 2 in (partial) cross-section while Fig. 3b shows the second part 2 in top view.
  • the second part 2 of Fig. 3 is substantially funnel-shaped, the funnel ending at the central liquid opening 3.
  • An outer surface near the opening 3 may be provided with a screw thread for mounting the second part 2 on a spray gun (10 in Fig. 1) but is in the embodiment shown provided with a bayonet coupling arrangement 7.
  • Other coupling arrangements are also possible, for example "snap-fit" arrangements in which the coupling parts are clamped.
  • the bayonet coupling arrangement 7 preferably has two well-defined positions: insert and lock. Visual indications of these positions may be provided on the second part 2 to facilitate the coupling of the second part and the spray gun.
  • the upstanding collar of the bayonet coupling arrangement 7 is designed so as to slightly clamp the spray gun in order to provide a good sealing.
  • shallow channels 11 are provided in the rim 4 of the second part 2.
  • these channels 11 extend perpendicularly to the circumferential direction of the rim, and radially relative to the opening 3.
  • the channels 11 may have a depth of 1 mm or less, possibly only 0.5 mm, while their width may, for example, range from 1 to 3 mm. By providing these channels, a minimum air flow is guaranteed.
  • the depth and width of the channels 11 may depend on the liquid to be sprayed and will be chosen such that the liquid does not ooze out.
  • the channels 11 are shown to extend across the "bottom" of the U-shaped rim.
  • the channels 11 also extend along at least one wall of the U- shaped rim, forming channels extending in three dimensions, in order to improve the air flow into the reservoir.
  • the channels 11 may alternatively, or additionally, be provided in the edge 5 of the first part 1.
  • protrusions or other elements may be provided to define a minimum gap between the edge 5 of the first part 1 and the rim 4 of the second part 2. These protrusions may be elongate or circular.
  • a filter 9 is accommodated in the second part 2.
  • Such a filter serves to remove particles from the liquid and thus prevent any blockage of the spray gun.
  • the filter 9 is shown to be located at the end of the second part remote from the opening 3, this is not essential and other positions are also possible, for example approximately half-way between the opening 3 and the remote end, or near the opening 3. Suitable notches may be provided in the inner surface of the second part 2 for accommodating the filter 9, preferably using a "snap- fit" mounting. It is noted that the filter 9 does not cover or extend into the U-shaped groove. Accordingly, it can be seen that the filter 9 is not involved in drawing air into the container and may be omitted without affecting the proper functioning of the spray gun assembly.
  • the second part 2 may be provided with integral support elements 6' which serve to strengthen the second part and to distribute any forces exerted on the part.
  • Both the second part or lid 2 and the first part or container 1 may be made of plastic, preferably transparent plastic. Suitable plastics are thermoplasts, in particular polyethylene, although other materials may also be used. It is preferred that both the container and the lid are made of a bio-degradable plastic material.
  • the container 1 and the lid 2 can be very inexpensive and may both be disposable, thus saving cleansing costs.
  • the liquid to be sprayed may be any liquid, including but not limited to paint (both paint based on water and paint based on solvents), water, detergent and herbicide.
  • the present invention is based upon the insight that a liquid reservoir for use with a spray gun does not require an air vent opening if the seal between the parts of the reservoir is not perfect.
  • the present invention benefits from the insight that in use, the lowered pressure in the liquid reservoir draws air in while preventing the liquid flowing out.

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  • Nozzles (AREA)

Abstract

L'invention concerne un ensemble réservoir de liquide pour pistolet de pulvérisation (10) composé d’un premier élément (1) et d’un second élément (2), ce dernier possédant un orifice d’entrée (3) destiné à l’introduction du liquide dans le pistolet de pulvérisation. Le premier élément (1), qui peut être utilisé comme compartiment de mélange, est fermé en haut et sur les côtés, sans aucune prise d’air. Les deux éléments sont étanches aux liquides, mais non à l’air, ce qui permet à l’air de rentrer dans le système via la rainure située entre les pièces d’étanchéité. L’absence de prises d’air permet de manipuler le réservoir sans renverser le liquide qu’il contient.
PCT/EP2006/004860 2005-07-05 2006-05-16 Reservoir de pistolet de pulverisation dote d’un orifice d’entree etanche aux liquides WO2007003245A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05076539A EP1741493A1 (fr) 2005-07-05 2005-07-05 Réservoir de pistolet de pulvérisation avec un évent étanche aux liquides
EP05076539.5 2005-07-05

Publications (1)

Publication Number Publication Date
WO2007003245A1 true WO2007003245A1 (fr) 2007-01-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004860 WO2007003245A1 (fr) 2005-07-05 2006-05-16 Reservoir de pistolet de pulverisation dote d’un orifice d’entree etanche aux liquides

Country Status (2)

Country Link
EP (1) EP1741493A1 (fr)
WO (1) WO2007003245A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020225739A1 (fr) * 2019-05-06 2020-11-12 Chemicar Europe Nv Couvercle pour coupelle, en particulier couvercle pouvant être monté sur un pistolet de pulvérisation de peinture
BE1027259B1 (nl) * 2019-05-06 2020-12-08 Chemicar Europe Nv Deksel voor beker, in het bijzonder een deksel monteerbaar op een verfpistool
FR3110465A1 (fr) * 2020-05-20 2021-11-26 Exel Industries Godet pour pistolet de produit de revêtement à équilibrage de pression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009090273A1 (fr) * 2008-01-16 2009-07-23 Boss Auto Import, S.A. Récipient jetable amélioré à paroi double avec surface intérieure souple et son couvercle amélioré pour pistolets aérographes
GB0811050D0 (en) * 2008-06-17 2008-07-23 U Pol Ltd A Connector for a gravity feed spray gun, a gravity feed spray gun and a method of preparing a spray paint
BE1026378B1 (nl) * 2018-06-15 2020-01-20 Deca Packaging Group Nv Ventielloze recipiënt voor gebruik op een spuitpistool en werkwijze waarbij zulke recipiënt wordt toegepast.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE731598C (de) * 1940-05-04 1943-02-12 Albert Krautzberger Farbbehaelter fuer Mal- und Spritzgeraete
DE729382C (de) * 1938-05-19 1943-02-27 Albert Krautzberger Farbbehaelter fuer Mal- und Spritzgeraete
EP0411520A2 (fr) * 1989-08-04 1991-02-06 Roy D. Mattson Dispositif anti-gouttes et anti-fuites
DE202004002563U1 (de) * 2004-02-19 2005-06-23 Sata Farbspritztechnik Gmbh & Co.Kg Farbbecher für eine Fließbecher-Farbspritzpistole

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE729382C (de) * 1938-05-19 1943-02-27 Albert Krautzberger Farbbehaelter fuer Mal- und Spritzgeraete
DE731598C (de) * 1940-05-04 1943-02-12 Albert Krautzberger Farbbehaelter fuer Mal- und Spritzgeraete
EP0411520A2 (fr) * 1989-08-04 1991-02-06 Roy D. Mattson Dispositif anti-gouttes et anti-fuites
DE202004002563U1 (de) * 2004-02-19 2005-06-23 Sata Farbspritztechnik Gmbh & Co.Kg Farbbecher für eine Fließbecher-Farbspritzpistole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020225739A1 (fr) * 2019-05-06 2020-11-12 Chemicar Europe Nv Couvercle pour coupelle, en particulier couvercle pouvant être monté sur un pistolet de pulvérisation de peinture
BE1027259B1 (nl) * 2019-05-06 2020-12-08 Chemicar Europe Nv Deksel voor beker, in het bijzonder een deksel monteerbaar op een verfpistool
FR3110465A1 (fr) * 2020-05-20 2021-11-26 Exel Industries Godet pour pistolet de produit de revêtement à équilibrage de pression

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