EP2808088B1 - Fluid dispensing gun - Google Patents

Fluid dispensing gun Download PDF

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Publication number
EP2808088B1
EP2808088B1 EP13170020.5A EP13170020A EP2808088B1 EP 2808088 B1 EP2808088 B1 EP 2808088B1 EP 13170020 A EP13170020 A EP 13170020A EP 2808088 B1 EP2808088 B1 EP 2808088B1
Authority
EP
European Patent Office
Prior art keywords
needle
dosing nozzle
gun
current
windows
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.)
Active
Application number
EP13170020.5A
Other languages
German (de)
French (fr)
Other versions
EP2808088A1 (en
Inventor
Jean-Marie Poppe
Lieven Sichien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Altachem NV
Original Assignee
Altachem NV
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 Altachem NV filed Critical Altachem NV
Priority to EP13170020.5A priority Critical patent/EP2808088B1/en
Priority to PL13170020T priority patent/PL2808088T3/en
Publication of EP2808088A1 publication Critical patent/EP2808088A1/en
Application granted granted Critical
Publication of EP2808088B1 publication Critical patent/EP2808088B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps
    • B65D83/207—Actuators comprising a manually operated valve and being attachable to the aerosol container, e.g. downstream a valve fitted to the container; Actuators associated to container valves with valve seats located outside the aerosol container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B05B12/008—Pressure or flow rate sensors integrated in or attached to a discharge apparatus, e.g. a spray gun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
    • B05B9/0894—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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening

Definitions

  • the invention concerns a fluid dispensing gun comprising a dispensing tube with a dosing nozzle, a spring-loaded needle which is co-axially moveable in the dispensing tube for opening and closing the dosing nozzle, a trigger for actuating said needle in order to open the dosing nozzle and to dispense the fluid, regulating means for regulating the degree of opening of the outlet of the dosing nozzle and coupling means for coupling a pressurized can to the gun and means for visual feedback of the current degree of opening of the outlet of the dosing nozzle, wherein the means for visual feedback are designed as position indicators which show the current co-axial position of the needle within the dispensing tube.
  • Fluid dispensing guns are used for dispensing one or two component polyurethane (PU) foam systems, adhesives, sealants, etc.
  • PU polyurethane
  • a fluid dispensing gun for foams, adhesives and sealants comprising a dispensing tube and a trigger for actuating a gun needle able to open the end of said dispensing tube for dispensing the fluid which may be coupled to a pressurized can is known from EP 1 650 140 A1 .
  • the object of the present invention is therefore to provide a better regulation and control of the output rate of the fluid dispensing gun.
  • the position indicators are in form of a window or a plurality of windows provided in the housing of the gun and the needle or a part linked to it is provided with markers which appear in the windows in function of the co-axial position of the needle within the dispensing tube.
  • This embodiment concerns the control of the output rate.
  • the user can only consider the degree he has activated the regulating means for regulating the degree of opening of the dosing nozzle in order to have a vague idea of the current output rate.
  • the output rate can hardly be adapted to the current needs.
  • With a visual feedback the user is able to see at any moment how the output rate is regulated.
  • optical means can be coupled to the needle or parts linked to it in order to show the current co-axial position of the needle within the dispensing tube.
  • the part linked to the needle can be e.g. the regulating means which is generally in form of a back screw.
  • This back screw can be provided with a slope which appears in the window or the windows provided in the wall of the gun showing the degree of opening of the dosing nozzle.
  • means for acoustic and/or haptic feedback of the current output rate are provided.
  • the inside of the dosing nozzle (1) according to the present invention has a first cylindrical area (2), followed by a first conical area (3), followed by a second cylindrical area (4), followed by a second conical area (5) and ends in the outlet (6) of the dosing nozzle (1) with a third cylindrical area (7).
  • the dosing nozzle (1) of a current dispensing gun (lower view of the figures) has a first cylindrical area (8), followed by a conical area (9) and ends in the dosing nozzle (6) with a second cylindrical area (10).
  • the design of the needle (11) is unchanged.
  • the current position of the needle defining the output rate is shown by position indicators are in form of a plurality of windows (12) provided in the housing (17) of the gun and the needle or a part linked to it is provided with markers which appear in the windows in function of the co-axial position of the needle within the dispensing tube.
  • the four white windows of Fig. 1b correspond to the closed position
  • the one black window of Fig. 2b corresponds to low output
  • the two black windows of Fig. 3b correspond to middle output
  • the three black windows of Fig. 4b correspond to high output
  • the four black windows of Fig. 5b correspond to maximum output.
  • a second slope (18) provided on the back screw (14) gives visual feedback of the current output rate since it appears in the windows (12) of the housing (17) as explained above concerning Figures 1b , 2b , 3b , 4b and 5b .
  • the back screw (14) with the slope (18) at its end is shown in detail in Figures 7a and 7b .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Description

  • The invention concerns a fluid dispensing gun comprising a dispensing tube with a dosing nozzle, a spring-loaded needle which is co-axially moveable in the dispensing tube for opening and closing the dosing nozzle, a trigger for actuating said needle in order to open the dosing nozzle and to dispense the fluid, regulating means for regulating the degree of opening of the outlet of the dosing nozzle and coupling means for coupling a pressurized can to the gun and means for visual feedback of the current degree of opening of the outlet of the dosing nozzle, wherein the means for visual feedback are designed as position indicators which show the current co-axial position of the needle within the dispensing tube.
  • Fluid dispensing guns are used for dispensing one or two component polyurethane (PU) foam systems, adhesives, sealants, etc.
  • A fluid dispensing gun for foams, adhesives and sealants comprising a dispensing tube and a trigger for actuating a gun needle able to open the end of said dispensing tube for dispensing the fluid which may be coupled to a pressurized can is known from EP 1 650 140 A1 .
  • A major drawback of presently available fluid dispensing guns lies in the fact that the output rate cannot be very precisely regulated and controlled.
  • A dosage gun comprising a scale provided on a rear end of the housing for indicating the position of the dosage device in relation to the emission nozzle is known from US 4,955,544 A .
  • The object of the present invention is therefore to provide a better regulation and control of the output rate of the fluid dispensing gun.
  • This object is achieved according to the present invention in that the position indicators are in form of a window or a plurality of windows provided in the housing of the gun and the needle or a part linked to it is provided with markers which appear in the windows in function of the co-axial position of the needle within the dispensing tube.
  • This embodiment concerns the control of the output rate. In currently available fluid dispensing guns, the user can only consider the degree he has activated the regulating means for regulating the degree of opening of the dosing nozzle in order to have a vague idea of the current output rate. Combined with the fact that in current fluid dispensing guns a small needle travel leads to a high increase of the output rate, the output rate can hardly be adapted to the current needs. With a visual feedback, the user is able to see at any moment how the output rate is regulated.
  • Since the needle opens and closes the dosing nozzle and defines the output rate, optical means can be coupled to the needle or parts linked to it in order to show the current co-axial position of the needle within the dispensing tube.
  • The part linked to the needle can be e.g. the regulating means which is generally in form of a back screw. This back screw can be provided with a slope which appears in the window or the windows provided in the wall of the gun showing the degree of opening of the dosing nozzle. As alternative or complementary embodiment of the present invention, means for acoustic and/or haptic feedback of the current output rate are provided.
  • In this context, it is possible to have a snap fixed on the needle which provokes a snapping noise at each progression of the needle. This may help users in a dark environment to estimate the current dosing nozzle rate. It is also possible to fix on the needle a protrusion which can be felt at the outside of the gun by the user. In function of the position of the protrusion within a window, the user can estimate the current output rate.
  • In the following, execution examples of the invention are explained in detail with reference to the figures.
    • Fig. 1a
    a comparative representation of a dosing nozzle according to the invention and of a dosing nozzle according to the prior art with 0 mm needle travel,
    Fig. 1b
    the visual feedback for the user corresponding to the position of Fig. 1a,
    Fig. 2a
    a comparative representation of a dosing nozzle according to the invention and of a dosing nozzle according to the prior art with 1 mm needle travel,
    Fig. 2b
    the visual feedback for the user corresponding to the position of Fig. 2a,
    Fig. 3a
    a comparative representation of a dosing nozzle according to the invention and of a dosing nozzle according to the prior art with 2 mm needle travel,
    Fig. 3b
    the visual feedback for the user corresponding to the position of Fig. 3a,
    Fig. 4a
    a comparative representation of a dosing nozzle according to the invention and of a dosing nozzle according to the prior art with 3 mm needle travel,
    Fig. 4b
    the visual feedback for the user corresponding to the position of Fig. 4a,
    Fig. 5a
    a comparative representation of a dosing nozzle according to the invention and of a dosing nozzle according to the prior art with 4 mm needle travel,
    Fig. 5b
    the visual feedback for the user corresponding to the position of Fig. 5a,
    Fig. 6a
    an overview of the assembly,
    Fig. 6b
    a detail view of the rear part of the needle and of the back screw,
    Fig. 7a
    a perspective view of the back screw and
    Fig. 7b
    a side view of the back screw.
  • As shown in Fig. 1a, 2a, 3a, 4a and 5a, the inside of the dosing nozzle (1) according to the present invention (upper view of the figures) has a first cylindrical area (2), followed by a first conical area (3), followed by a second cylindrical area (4), followed by a second conical area (5) and ends in the outlet (6) of the dosing nozzle (1) with a third cylindrical area (7). The dosing nozzle (1) of a current dispensing gun (lower view of the figures) has a first cylindrical area (8), followed by a conical area (9) and ends in the dosing nozzle (6) with a second cylindrical area (10). The design of the needle (11) is unchanged.
  • Tests have shown that the ratio between the needle travel and the foam output rate is much better with the design of the dosing nozzle (1) according to the present invention because the ratio between the needle travel and the output is less important and more linear. Therefore, it is easier to regulate the output rate of the fluid dispensing gun.
  • As shown in Fig. 1b, 2b, 3b, 4b and 5b, the current position of the needle defining the output rate is shown by position indicators are in form of a plurality of windows (12) provided in the housing (17) of the gun and the needle or a part linked to it is provided with markers which appear in the windows in function of the co-axial position of the needle within the dispensing tube. The four white windows of Fig. 1b correspond to the closed position, the one black window of Fig. 2b corresponds to low output, the two black windows of Fig. 3b correspond to middle output, the three black windows of Fig. 4b correspond to high output and the four black windows of Fig. 5b correspond to maximum output.
  • Of course, it is possible to provide more or less windows or to visualize the output rate of the fluid dispensing gun in any other way.
  • Fig. 6a shows an overview of the assembly and Fig. 6b shows a detail view of the rear part of the needle (11) and of the back screw (14). The needle (11) can be activated by pushing the trigger (13). The needle (11) has a front part (11a) and a rear part (11b) which are coupled together. The needle (11) is loaded by a spring (12) pushing on the rear part (11b) of the needle (11). A back screw (14) is linked to the rear part (11b) of the needle (11) and is provided with a thread (15) cooperating with a corresponding thread (16) of the housing (17) of the gun. Turning the end of the back screw (14) which is outside the housing of the fluid dispensing gun makes the needle travel co-axially within the housing (17) and regulates the degree of opening of the dosing nozzle (1). The lead or pitch on the back screw (14) is 3 mm which means that if the back screw (14) is turned slightly less than 360° (which is the maximum), a needle travel of 3 mm is achieved. Since a needle travel of about 4 mm is required for a satisfying regulation of the fluid output, a slope (19) is provided on the rear part (11b) of the needle (11) as shown in Fig. 6b.
  • A second slope (18) provided on the back screw (14) gives visual feedback of the current output rate since it appears in the windows (12) of the housing (17) as explained above concerning Figures 1b, 2b, 3b, 4b and 5b. The back screw (14) with the slope (18) at its end is shown in detail in Figures 7a and 7b.

Claims (2)

  1. Fluid dispensing gun comprising a dispensing tube with a dosing nozzle (1), a spring-loaded needle (11) which is co-axially moveable in the dispensing tube for opening and closing the dosing nozzle (1), a trigger (13) for actuating said needle (11) in order to open the dosing nozzle (1) and to dispense the fluid, regulating means (14) for regulating the degree of opening of the outlet (6) of the dosing nozzle (1) and coupling means for coupling a pressurized can to the gun and means for visual feedback of the current degree of opening of the outlet (6) of the dosing nozzle (1), wherein the means for visual feedback are designed as position indicators which show the current co-axial position of the needle (11) within the dispensing tube, characterized in that the position indicators are in form of a window (12) or a plurality of windows (12) provided in the housing (17) of the gun and the needle (11) or a part linked to it is provided with markers which appear in the windows (12) in function of the co-axial position of the needle (11) within the dispensing tube.
  2. Fluid dispensing gun according to claim 1, characterized in that means for acoustic and/or haptic feedback of the current dosing nozzle rate are provided.
EP13170020.5A 2013-05-31 2013-05-31 Fluid dispensing gun Active EP2808088B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13170020.5A EP2808088B1 (en) 2013-05-31 2013-05-31 Fluid dispensing gun
PL13170020T PL2808088T3 (en) 2013-05-31 2013-05-31 Fluid dispensing gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13170020.5A EP2808088B1 (en) 2013-05-31 2013-05-31 Fluid dispensing gun

Publications (2)

Publication Number Publication Date
EP2808088A1 EP2808088A1 (en) 2014-12-03
EP2808088B1 true EP2808088B1 (en) 2020-09-09

Family

ID=48537835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13170020.5A Active EP2808088B1 (en) 2013-05-31 2013-05-31 Fluid dispensing gun

Country Status (2)

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EP (1) EP2808088B1 (en)
PL (1) PL2808088T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9108214B2 (en) * 2013-10-31 2015-08-18 Nordson Corporation Dispensing module having a sealing zone and method for dispensing an adhesive
BE1025578B1 (en) * 2018-03-16 2019-04-24 Altachem Nv LIQUID RELEASE GUN AND METHOD FOR DELIVING 1K POLYURETHANE FOAM

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955544A (en) * 1987-04-16 1990-09-11 C. Ehrensperger Ag Dosage gun

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20011470U1 (en) * 2000-06-30 2001-11-15 Sata Farbspritztechnik Spray gun
EP1423206A4 (en) * 2001-09-06 2006-08-30 Graco Minnesota Inc Voltage and current display for electrostatic spray gun
EP1650140A1 (en) 2004-10-19 2006-04-26 de Schrijver, Aster Foam or fluid dispensing gun supplied by pressurised can
EP2055391B2 (en) * 2007-10-31 2022-02-09 Nordson Corporation Improved spray gun trigger apparatus and methods
US8899501B2 (en) * 2008-07-23 2014-12-02 Sata Gmbh & Co. Kg Spray gun with paint cartridge
DE102009055408A1 (en) * 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 Hand held sprayer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955544A (en) * 1987-04-16 1990-09-11 C. Ehrensperger Ag Dosage gun

Also Published As

Publication number Publication date
EP2808088A1 (en) 2014-12-03
PL2808088T3 (en) 2021-01-11

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