WO2005065840A1 - Liquid spray gun with manually separable portions - Google Patents

Liquid spray gun with manually separable portions Download PDF

Info

Publication number
WO2005065840A1
WO2005065840A1 PCT/US2004/042635 US2004042635W WO2005065840A1 WO 2005065840 A1 WO2005065840 A1 WO 2005065840A1 US 2004042635 W US2004042635 W US 2004042635W WO 2005065840 A1 WO2005065840 A1 WO 2005065840A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
liquid
outlet
passageways
nozzle portion
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.)
Ceased
Application number
PCT/US2004/042635
Other languages
English (en)
French (fr)
Inventor
Russell E. Blette
Franklyn L. Frederickson
Stephen C. P. Joseph
Jameel R. Qiblawi
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to JP2006547191A priority Critical patent/JP4847343B2/ja
Priority to BRPI0418265-0A priority patent/BRPI0418265A/pt
Priority to DE602004014409T priority patent/DE602004014409D1/de
Priority to EP04814778A priority patent/EP1699565B1/en
Priority to CA2551298A priority patent/CA2551298C/en
Publication of WO2005065840A1 publication Critical patent/WO2005065840A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B05B7/02—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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • B05B7/083—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter comprising rotatable spray shaping gas jet outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet

Definitions

  • This invention relates to liquid spray guns of the type comprising a body assembly including a nozzle portion having a liquid passageway extending to an outlet end opening through an outlet end of the nozzle portion, the body assembly having a first air passageway having an outlet end at the outlet end of the nozzle portion that extends around the outlet end of the liquid outlet passageway and is shaped to direct air under greater than atmospheric pressure against liquid flowing out of the outlet end of the liquid outlet passageway to propel the liquid away from that outlet end while shaping the liquid into a generally conical stream about an axis; the body assembly including horns projecting past the outlet end of the nozzle on opposite sides of the axis, and also having a second air passageway extending to outlet passageways and apertures spaced along the horns from the outlet end of the nozzle portion and facing opposite sides of the axis, which outlet passageways and apertures direct air under greater than atmospheric pressure flowing through the second air passageway against opposite sides of the stream of liquid formed by air flowing through the first air passageway to reshape that
  • a liquid spray gun comprising a body assembly including a nozzle portion having a liquid passageway extending to an outlet end opening through an outlet end of the nozzle portion, the body assembly having a first air passageway extending to an outlet end at the outlet end of the nozzle portion that extends around the outlet end of the liquid outlet passageway and is shaped to direct air under greater than atmospheric pressure against liquid flowing out of the outlet end of the liquid outlet passageway to propel the liquid away from that outlet end while shaping the liquid into a generally conical stream about an axis; the body assembly including horns projecting past the outlet end of the nozzle on opposite sides of the axis, and also having a second air passageway extending to outlet passageways and apertures spaced along the horns from the outlet end of the nozzle portion and facing opposite sides of the axis, which outlet passageways and apertures direct air under greater than atmospheric pressure flowing through
  • the manually operable means for releasably mounting the nozzle portion on the platform portion can comprise the platform portion including a support wall, an opening through the support wall between inner and outer surfaces of the support wall, and the nozzle portion including a projection from a contact surface on the side of the nozzle portion opposite its outlet end, the projection being received in the support wall opening with the contact surface against the outer surface of the support wall, and a distal part of the projection projecting past the outer surface of support wall, the distal part of the projection having a transverse groove, and the manually operable means further including a latching member releasably engaged in the transverse groove adapted for manual removal from the distal part.
  • the platform portion can be reusable (i.e., made of metal), and the nozzle and air cap portions can be molded of a polymeric material.
  • the molded air cap and nozzle portions can be sufficiently inexpensive that they can be discarded rather than cleaned for some applications.
  • the passageways on the horns opening through the outlet apertures that direct high velocity air flowing through the second air passageway against opposite sides of a stream of liquid formed by air flowing through the first air passageway to reshape that generally conical stream of liquid into a wide elongate stream can have a greater width in a direction at a right angle to the axis than depth in a direction parallel to the axis (e.g., the outlet apertures can be generally rectangular).
  • the body assembly can include an air cap including the horns that is molded of polymeric material, with the non-circular passageways leading to the outlet apertures being formed during the molding process.
  • Means are provided for mounting the molded polymeric air cap portion on the nozzle portion, with the molded air cap and the nozzle portion having surfaces forming the first and second air passageways.
  • the means mounting the air cap portion on the nozzle portion can allow rotation of the air cap portion about the axis relative to the nozzle portion, the air cap and nozzle portions can include stops limiting relative rotation of the air cap portion relative to the nozzle portion to rotation through a predetermined angle (e.g., 90 degrees) between first and second relative positions, and the means mounting the air cap portion on the nozzle portion can include surfaces in frictional engagement to restrict relative rotation of the air cap and nozzle portions until a predetermined torque is manually applied between the air cap and nozzle portions.
  • a predetermined angle e.g. 90 degrees
  • Figure 1 Figure 9 is a sectional view taken approximately along line 9-9 of Figure 8; Figure 10 is a front view of the nozzle portion of figure 2; Figure 11 is an enlarged rear view of the air cap portion included in the spraying device of Figure 1 ; Figure 12 is a sectional view taken approximately along line 12-12 of Figure 11; Figure 13 is a sectional view taken approximately along line 13-13 of Figure 12; and Figures 14, 15, 16, and 17 are enlarged illustrations of alternative shapes that could be used for outlet passageways and apertures in horns on the air cap portion included in the spraying device of Figure 1.
  • Detailed Description of the Invention Referring now to the drawing there is illustrated a liquid spraying device or spray gun 10 according to the present invention.
  • the liquid spray gun 10 comprises a body assembly 12 including a nozzle portion 14 with an outlet end 15.
  • the nozzle portion 14 has a liquid passageway 16 extending from an inlet end 17 to an outlet end 18 opening through the outlet end 15 of the nozzle portion 14.
  • the body assembly 12 also has a first air passageway 20 extending from an inlet end 21 to an outlet end 22 at the outlet end 15 of the nozzle portion 14.
  • the outlet end 22 of the first air passageway 20 extends around the outlet end 18 of the liquid passageway 16 and is shaped to direct air under greater than atmospheric pressure against liquid flowing out of the outlet end 18 of the liquid passageway 16 to propel liquid flowing out of the liquid passageway 16 away from the outlet end 15 of the nozzle portion 14 while shaping the liquid into a generally conical stream about an axis 23.
  • the body assembly 12 includes horns 24 projecting past the outlet end 15 of the nozzle portion 14 on opposite sides of that axis 23, and the body assembly 12 has a second air passageway 26 extending from an inlet end 27 through portions of the horns 24 to outlet passageways 28 haying outlet apertures spaced along the horns 24 from the outlet end 15 of the nozzle portion 14 and facing opposite sides of the axis 23.
  • the outlet passageways 28 and apertures are non-circular and are shaped to direct air under greater than atmospheric pressure flowing through the second air passageway 26 against opposite sides of a generally conical stream of liquid formed by air flowing through the first air passageway 20 to reshape that generally conical stream of liquid into a wide elongate stream.
  • the outlet passageways 28 and apertures are generally rectangular and have a greater width in a direction at a right angle to the axis 23 than depth in a direction parallel to the axis.
  • the outlet passageways 28 and apertures can comprise first and second pairs 28a and 28b of opposed outlet passageways 28 and apertures on the horns 24, the first pair of outlet passageways 28a and apertures each having a width in a direction at a right angle to the axis 23 of about 0.154 inch or 0.39 cm, a depth in a direction parallel to the axis 23 of about 0.35 inch or 0.89 cm, and being spaced about 0.25 inch or 0.64 cm from the outlet end 15 of the nozzle portion 14, with the outlet passageways 28a being disposed at an angle of about 66 degrees with respect to the axis; and the second pair of outlet passageways 28b and apertures each having a width in a direction at a right angle to the axis 23 of about 0.165 inch or 0.42 cm, a depth in a direction parallel
  • the means mounting the air cap portion 30 on the nozzle portion 14 includes a radially outwardly projecting annular ring 32 around the outlet end 15 of the nozzle portion 14 co-axial with the axis 23, and a generally cylindrical collar 33 on the air cap portion 30 having an annular recess 34 from its inner surface adapted to receive the annular ring 32 of the nozzle portion 14.
  • the collar 33 on the air cap portion 30 is sufficiently resiliently flexible that the inner surface of the collar 33 can be pressed over the annular ring 32 to position the ring 32 in the recess 34.
  • a cylindrical part 35 of the inner surface of the air cap portion has a close sliding fit around an outer surface of a cylindrical portion 37 of the nozzle portion 14 to separate the first and second air passageways 20 and 26.
  • mounting the air cap portion 30 on the nozzle portion 14 also includes surfaces on the air cap and nozzle portions 30 and 14 in frictional engagement (i.e., such engagement can be with each other as illustrated or, alternatively, could be with a frictional layer, not shown, between the air cap and nozzle portions 30 and 14) to restrict relative rotation of the air cap and nozzle portions 30 and 14 until a predetermined torque is manually applied between the air cap and nozzle portions 30 and 14. That predetermined torque should be enough to restrict rotation of the air cap portion 30 on the nozzle portion 14 by slight contact with the air cap portion, but not so much that it is difficult to manually rotate the nozzle portion 14 on the air cap portion 30.
  • Such torque should thus be in the range of 5 to 40 inch pounds, and more preferably in the range of 10 to 20 inch pounds.
  • An O-ring 39 is positioned between the air cap and nozzle portions 30 and 14 to restrict leakage between the collar 33 and the nozzle portion 14.
  • the outlet end 22 of the first air passageway 20 is shaped to direct a peripheral portion of air exiting the first air passageway 20 in a converging conical pattern (e.g., converging at an angle in the range of about 30 to 45 degrees with respect to the axis 23 against liquid exiting the outlet end 18 of the liquid passageway 16.
  • the liquid spray gun 10 further includes a platform portion 40 including a frame 41 having through air distribution passageways including an inlet passageway 42 (see Figures 3 and 7) with an inlet end 45 adapted to be connected to a supply of air under greater than atmospheric pressure, first and second air outlet openings 43 and 44, means in the form of an adjustable valve member 46 for regulating the portion of air flow through the air distribution passageways that can flow to the second air outlet opening 44, and manually operated valve means 47 for stopping or allowing flow of air from the inlet passageway 42 to the outlet openings 43 and 44 of the air distribution passageways.
  • the platform portion 40 and the nozzle portion 14 have manually operable means for releasably mounting the nozzle portion 14 on the platform portion 40 with the first and second air outlet openings 43 and 44 of the air distribution passageways communicating with the inlet ends 21 and 27 of the first and second air passageways 20 and 26 respectively.
  • That manually operable means comprises the platform portion 40 including a support wall 48 having opposite inner and outer surfaces 49 and 50, a cylindrical opening 51 through the support wall 48 between its inner and outer surfaces 49 and 50; and the nozzle portion 14 including a projection 52 beyond a contact surface 53 on the side of the nozzle portion 14 opposite its outlet end 18.
  • the latch member 55 includes a cam surface 55b on its side opposite the latching surface 55a that faces the support wall 48 and is disposed at an angle (e.g., about 45 degrees) with respect to the axis of the opening 51 so that pressing the distal end of the projection 52 against the cam surface 55b will cause the latch member 55 to move to its release position and allow the distal end of the projection 52 to move past the latch member 55 until the projection 52 is fully engaged in the opening 51, whereupon the latching surface 55a will move into engagement with a portion of the transverse groove 56 (the latching position of the latch member 55) under the influence of the spring 54 to retain the projection 52 and thereby the nozzle portion 14 in engagement with the platform portion 40.
  • an angle e.g., about 45 degrees
  • the platform portion 40 can be made by modifying a metal spray gun that is commercial available under the trade designation "HVLP Gravity feed spray gun” from Graco, Minneapolis, MN, by adding to the frame 41 a portion 41a for mounting the latch member 55 described above and by adding to the frame 41 a plate 58 which provides the outer surface 50 shaped for sealing engagement with the contact surface 53 on the nozzle portion 14, and in which the first and second air outlet openings 43 and 44 are formed.
  • the second air outlet openings 44 are defined by sockets adapted to closely receive projecting tubular portions 59 that are at the inlet ends 27 of the second air passageways 26 in the nozzle portion 14.
  • the plate 55 has an opening 71 adapted to closely receive a projection 57 on the nozzle portion 14 to help locate the nozzle portion 14 on the plate 58, and has a groove 69 around its periphery adapted to receive in sealing engagement a projecting lip 68 around the periphery of the nozzle portion 14.
  • the manually operated valve means 46 for stopping or allowing flow of air from the inlet passageway 42 to the outlet openings 43 and 44 of the air distribution passageways includes a valve seat on the frame 41 around an opening 60 between the inlet passageway 42 and a second air passageway 61 included in the air distribution passageways that is parallel to the inlet passageway 42.
  • a fluid flow control needle 70 is attached to the valve member 62.
  • the fluid flow control needle 70 extends through a central bore 72 in the projection 52 and through a seal 74 in the bore 72 around its periphery which separates part of the liquid passageway 16 adjacent its outlet end 18 from the opposite end of that bore 72 (see figure 4).
  • a generally conical end portion 75 of that needle 70 is positioned against the inner surface of and closes the liquid passageway 16 adjacent its outlet end 18 when the valve member 62 is positioned in its closed position to which it is biased by the spring 63.
  • the pressure tap 77 should communicate with the second air passageway 26 at a position spaced (e.g. over 1 inch or 2.54 cm) from the outlet passageways 28 and outlet apertures in the air horns 24 so that it does not cause air pressure differences between the two horns 24.
  • the body assembly 12 including both the nozzle portion 14 and the air cap portion 30 can be molded of a suitable polymeric material (e.g., polypropylene, polyethylene, or glass filled nylon).

Landscapes

  • Nozzles (AREA)
  • Special Spraying Apparatus (AREA)
PCT/US2004/042635 2003-12-30 2004-12-16 Liquid spray gun with manually separable portions Ceased WO2005065840A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2006547191A JP4847343B2 (ja) 2003-12-30 2004-12-16 手動で分離可能な部分を有する液体スプレーガン
BRPI0418265-0A BRPI0418265A (pt) 2003-12-30 2004-12-16 pistola para borrifar lìquido
DE602004014409T DE602004014409D1 (de) 2003-12-30 2004-12-16 Flüssigkeitsspritzpistole mit manuell trennbaren teilen
EP04814778A EP1699565B1 (en) 2003-12-30 2004-12-16 Liquid spray gun with manually separable portions
CA2551298A CA2551298C (en) 2003-12-30 2004-12-16 Liquid spray gun with manually separable portions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/748,494 2003-12-30
US10/748,494 US7032839B2 (en) 2003-12-30 2003-12-30 Liquid spray gun with manually separable portions

Publications (1)

Publication Number Publication Date
WO2005065840A1 true WO2005065840A1 (en) 2005-07-21

Family

ID=34710930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/042635 Ceased WO2005065840A1 (en) 2003-12-30 2004-12-16 Liquid spray gun with manually separable portions

Country Status (11)

Country Link
US (1) US7032839B2 (enExample)
EP (1) EP1699565B1 (enExample)
JP (1) JP4847343B2 (enExample)
CN (1) CN100467136C (enExample)
AT (1) ATE397976T1 (enExample)
BR (1) BRPI0418265A (enExample)
CA (1) CA2551298C (enExample)
DE (1) DE602004014409D1 (enExample)
ES (1) ES2308301T3 (enExample)
RU (1) RU2376074C2 (enExample)
WO (1) WO2005065840A1 (enExample)

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RU2006123334A (ru) 2008-02-10
RU2376074C2 (ru) 2009-12-20
US20050145724A1 (en) 2005-07-07
JP4847343B2 (ja) 2011-12-28
US7032839B2 (en) 2006-04-25
EP1699565A1 (en) 2006-09-13
ATE397976T1 (de) 2008-07-15
BRPI0418265A (pt) 2007-05-02
CN100467136C (zh) 2009-03-11
CN1902003A (zh) 2007-01-24
EP1699565B1 (en) 2008-06-11
CA2551298A1 (en) 2005-07-21
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ES2308301T3 (es) 2008-12-01
JP2007516833A (ja) 2007-06-28

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