US3190564A - Spray coating apparatus for spraying liquid coating material under high pressure - Google Patents

Spray coating apparatus for spraying liquid coating material under high pressure Download PDF

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Publication number
US3190564A
US3190564A US264324A US26432463A US3190564A US 3190564 A US3190564 A US 3190564A US 264324 A US264324 A US 264324A US 26432463 A US26432463 A US 26432463A US 3190564 A US3190564 A US 3190564A
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US
United States
Prior art keywords
chamber
orifice
control valve
high pressure
under high
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.)
Expired - Lifetime
Application number
US264324A
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English (en)
Inventor
Liedberg Kurt Herman
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Priority to US264324A priority Critical patent/US3190564A/en
Priority to GB7085/64A priority patent/GB996654A/en
Priority to DEA45286A priority patent/DE1235779B/de
Priority to CH311664A priority patent/CH421771A/de
Priority to NL6402503A priority patent/NL6402503A/xx
Priority to FR966922A priority patent/FR1386779A/fr
Application granted granted Critical
Publication of US3190564A publication Critical patent/US3190564A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B9/01—Spray pistols, discharge devices
    • 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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • 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
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets

Definitions

  • This invention relates generally to a spray coating apparatus and more specifically to a spray coating apparatus for spraying liquid coating material under very high pressure in order to avoid the use of compressed air as an atomizing medium.
  • the high pressure in airless spray coating guns usually makes manual operation of the material control valve dimcult and is often responsible for a too slow opening movement thereof, which is apt to produce nonuniform splashed and unacceptable coatings.
  • a still further object of the invention is to provide a spray coating apparatus of the above character in which a very small longitudinal movement of the control valve is necessary for a maximum valve opening even though there is only very small displacement of the valve body in the opening direction, whereby the tendency of splash marks to appear during opening or closing of the control valve is minimized or eliminated.
  • FIG. 1 is a longitudinal sectional view through a spray coating apparatus according to the invention.
  • FIG. 2 is an enlarged fragmentary view of the front portion of the apparatus in FIG. 1.
  • P16. 3 is an enlarged sectional view on line 33 in FIG. 1.
  • FIG. 4 is an enlarged sectional view on line 44 in FIG. 1
  • FIG. 5 is an enlarged sectional View on line 55 in FIG. 1.
  • the spray coating apparatus or gun illustrated in FIG. 1 embodies a handle having a forwardly extending gun body 11, a trigger 12 being pivotally attached to the body by a pintle 13.
  • a transverse through opening 14 from which there extends a traverse passage 15 of hexagonal cross section to the rear and forwardly directed bore 16, the passage 15 and the bore 16 being coaxial.
  • the bore 16 communicates 3,19%,564 Patented June 22, 1965 with a counterbore 17 provided in the spray nozzle end of the body 11 and receives together with the bore 16 a stepped cylindrical housing 18, which is threaded internally at its forward end to receive a valve seat sleeve 19.
  • the sleeve 19 has an internal annular shoulder 20 at its forward end which supports a valve seat 22 provided with a central discharge orifice 23 and having a press fit in the sleeve 19.
  • a deflecting plug 21 is fixedly connected to the forward end of the sleeve 19 as by threads and integral therewith.
  • the plug 21 has a transverse jet spoiling surface 211 directly in front of the orifice 23 and a pair of through passages 212 which are disposed radially outwardly of the surface 211, the passages 212 converging in a point centrally in front of the deflecting plug 21.
  • a chamber 24 for coating liquid under high pressure is formed within the housing 18 and the sleeve 19, the chamber 24 being closed at its rear by a centrally perforated washer 27 resting against a shoulder in the housing 18 and pressed thereagainst by packing material 26 and a gland nut 25 threadedly received in the housing 18.
  • a threaded passage 28 extends transversely to the counterbore 17 and receives a threaded connection 29 leading to a supply of coating liquid under high pressure, not shown.
  • a tapered tip 30 on the connection 29 fits in a correspondingly shaped radial opening 31 through which liquid via the connection 29 may enter chamber 24, the tip 30 also being provided for keeping the housing 18 in place in the body 11.
  • a locking screw 32 in the body 11 prevents removal of the connection 29.
  • the housing 18 has a threaded outward projection re ceiving a nut 33 thereon which secures a spray nozzle assembly to the forward end of the valve seat sleeve 19 and the plug 21.
  • the assembly includes a centrally perforated washer 34 resting tightly against the sleeve 19 and a nozzle holder 35 which by a circumferential flange 36 thereon, engaged by an inner shoulder 37 on the nut 33, is affixed to the sleeve 19 and kept in firm engagement with the interposed washer 34.
  • the holder 35 carries inside thereof a spray tip 38 having a small atomizing bore 39 formed axially therethrough and the tip 38 is kept in place against an internal shoulder in the holder 35 by a spacer sleeve 40.
  • a helical spring 43 bears against the washer 27 in the liquid chamber 24 and engages at its forward end a flange 44 on a guide member 45 extending inside of the spring 4-3 for a substantial length thereof.
  • the guide member 45 is fixedly connected as by brazing to a slender valve stem 46 slidably projecting from the liquid chamber 24 to the rear through the washer 27, the packing material 26, and the gland nut 25.
  • the slender stem 46 is a flexible steel wire such as a piano wire, for example having a diameter of l millimeter.
  • the forward end of the guide member 45 is'th'readed and receives fixedly thereon a cylindrical control valve body 47 pro vided with a fiat front face for cooperation with the flat valve seat 22.
  • the spring 43 exerts a closing bias on the valve body 47.
  • the passage 15 receives slidably and unrotatably therein an elongated hexagonal member or sleeve 49 internally traversed by the valve stem 46 which at its rear end is firmly engaged by a chuck 50.
  • the chuck 50 has a tapered tip 52 incorporating longitudinal slits 521, FIG. 5, and is threadedly received in a hexagonal head 51 having a frusto-conical internal opening cooperating with the tip 52 for urging its slitted portions radially inward into firm engagement with the stem 46.
  • the head 51 is slidably and unrotatably received in the passage 15.
  • a helical spring 53 is interposed between guiding bores 54, 55 in respectively the head 51 and the sleeve 49, the spring 53 being weaker than the spring 43 in the liquid chamber 24.
  • the forward end of the sleeve 49 extends into the opening 14 and has a reduced cylindrical portion 56 which is received in a hole 66 centrally in a transverse plate 57.
  • the trigger 12 straddles the body portion'11 and the opening 14 from below by spaced forked arms 58 having opposed slits 67 for receiving the ends of the transverse plate 57 whereby the plate 57 is movable in unison with the trigger 12.
  • a locking mechanism including a ring 60 freely rotatable in atransverse through opening 61 in the body 11 around the sleeve 49.
  • a pair of spaced circumferential grooves 62, 63 are provided in the mantle of the sleeve 49 adjacent the ring 60 and the sleeve 49 has also a flattened upper recess 68 extending between the groove .62, 63 and forming a communication therebetween.
  • An abutment pin 64 traversing the ring 60 in its longitudinal central plane extends transversely over the recess 68.
  • One end of the pin 64 has an outwardly projecting finger piece 65 formed thereon.
  • the sleeve 49 by actuation of the trigger 12 is free to perform a full throw from neutral position with the pin 64 in the groove 63 at the rear end of the recess 68, which position corresponds to closed position of the control valve 47, to open position with the pin 64 in the groove 62 at the other end of the recess 68, in which position the control valve 47 is open, and back again to neutral position.
  • a plunger 70 is axially movably arranged in the body 11 and engages frictionally the ring 60 against which the plunger 70 is pressed by a helical spring 71. The frictional engagement keeps the ring 60 and its pin 64 in the selected adjusted position.
  • the jet spoiling surface 211 of the deflecting plug 21 prevents unintentional direct outward projection of a massive high-energy jet from the orifice 23. Instead there will be formed two converging jets from the passages 212 combining their flow into a flattened spray of reduced velocity unable to cause injuries.
  • the comparatively wide passages 212 do not disturb free flow to the spray tip 38 during normal operation of the apparatus.
  • the central opening in the washer 34 is provided for suitably modifying the velocity of the flow to the spray tip 38.
  • the spring 43 With the trigger 12 released the spring 43 will instantly close the control valve 47 and the spring 53 will thereupon move the sleeve 49 and the trigger 12 to neutral position.
  • the spring 43 thus serves to produce a closing bias but is also active to prevent bucking of the slender flexible stem 46 under the high pressures of about 150-200 kilogrammes per square centimeter acting in the liquid chamber 24.
  • the axial force to be balanced during opening of the control valve 47 depends on the pressure and the cross-sectional area of the stem and thanks to the slender stem this force will be small. As a consequence the spring 43 need not be strong and manual depression of the trigger 12 will therefore be quite easy.
  • the discharge orifice 23 In order to fully relieve the control valve body 47 from axial forces when the control valve is closed, the discharge orifice 23 is given an area substantially equal to the cross-sectional area of the slender stem 46.
  • a spray coating apparatus as set forth in claim 1 in which said orifice and said stem are of substantially equal cross-sectional area.
  • a spray coating apparatus for spraying liquid coating material under high pressure of the type in which a removable and exchangeable spray nozzle is provided with an atomizing aperture for forming a jet of liquid particles and in which a control valve positioned in proximity to and upstream of said aperture and in alignment with said spray nozzle controls the flow of coating material under high pressure through a restricted discharge orifice in the seat of said control valve to said aperture, comprising in combination therewith a valve seat sleeve for supporting said valve seat, a deflecting member integral with said sleeve and disposed between said seat and said spray nozzle, a jet spoiling surface on said deflecting member and disposed transversely in front of said orifice for preventing unhindered outward projection of a massive jet from said orifice with said spray nozzle removed, and passage means in said deflecting member and radially offset from said orifice for maintaining outward flow past said deflecting member.
  • a spray coating apparatus as set forth in claim 8, in which said passage means are a pair of passages converging in a point downstream of said deflecting member.

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  • Nozzles (AREA)
US264324A 1963-03-11 1963-03-11 Spray coating apparatus for spraying liquid coating material under high pressure Expired - Lifetime US3190564A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US264324A US3190564A (en) 1963-03-11 1963-03-11 Spray coating apparatus for spraying liquid coating material under high pressure
GB7085/64A GB996654A (en) 1963-03-11 1964-02-20 Improvements in spray coating apparatus for spraying liquid coating material under high pressure
DEA45286A DE1235779B (de) 1963-03-11 1964-02-21 Spritzpistole
CH311664A CH421771A (de) 1963-03-11 1964-03-11 Spritzpistole
NL6402503A NL6402503A (de) 1963-03-11 1964-03-11
FR966922A FR1386779A (fr) 1963-03-11 1964-03-11 Pistolet pulvérisateur à haute pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US264324A US3190564A (en) 1963-03-11 1963-03-11 Spray coating apparatus for spraying liquid coating material under high pressure

Publications (1)

Publication Number Publication Date
US3190564A true US3190564A (en) 1965-06-22

Family

ID=23005545

Family Applications (1)

Application Number Title Priority Date Filing Date
US264324A Expired - Lifetime US3190564A (en) 1963-03-11 1963-03-11 Spray coating apparatus for spraying liquid coating material under high pressure

Country Status (5)

Country Link
US (1) US3190564A (de)
CH (1) CH421771A (de)
DE (1) DE1235779B (de)
GB (1) GB996654A (de)
NL (1) NL6402503A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380705A (en) * 1965-06-28 1968-04-30 Binks Mfg Co Spray gun
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US5094402A (en) * 1990-01-15 1992-03-10 Perret Jr Robert J High performance spray head
US20040031860A1 (en) * 2002-08-19 2004-02-19 Micheli Paul R. Spray gun with improved pre-atomization fluid mixing and breakup
JP2004074155A (ja) * 2002-08-19 2004-03-11 Illinois Tool Works Inc <Itw> 改善された噴霧用スプレーガン
US20040169093A1 (en) * 2003-02-28 2004-09-02 Strong Christopher L. One-piece fluid nozzle
US20060000928A1 (en) * 2004-06-30 2006-01-05 Micheli Paul R Fluid atomizing system and method
US20060065760A1 (en) * 2004-09-28 2006-03-30 Micheli Paul R Turbo spray nozzle and spray coating device incorporating same
US20060214027A1 (en) * 2004-06-30 2006-09-28 Micheli Paul R Fluid atomizing system and method
US20070221762A1 (en) * 2006-03-24 2007-09-27 Micheli Paul R Spray device having removable hard coated tip
US20080017734A1 (en) * 2006-07-10 2008-01-24 Micheli Paul R System and method of uniform spray coating
US20090008469A1 (en) * 2007-07-03 2009-01-08 Illinois Tool Works Inc. Spray device having a parabolic flow surface
WO2015192896A1 (de) * 2014-06-18 2015-12-23 Vermes Microdispensing GmbH DOSIERVENTIL MIT VENTILSTÖßEL
US11420223B2 (en) * 2018-06-15 2022-08-23 Veeco Instruments Inc. High pressure spray head
US20230278053A1 (en) * 2018-04-01 2023-09-07 Graco Minnesota Inc. Spray gun and components for spraying paints and other coatings

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1551508A (en) * 1925-08-25 Pubs-injection vai
US2550888A (en) * 1948-01-13 1951-05-01 Jr Charles W Traughber Spray gun
US2557606A (en) * 1948-02-12 1951-06-19 Atlas Diesel Ab Adjustable stop for spray gun valve spindles
US2621970A (en) * 1950-06-02 1952-12-16 American Brake Shoe Co Spray gun
US2705663A (en) * 1952-08-08 1955-04-05 Robert I Gilbreath Spray gun
US2956752A (en) * 1956-08-31 1960-10-18 Spraying Systems Co Spray gun
US2969926A (en) * 1956-10-30 1961-01-31 Vilbiss Co Airless spray guns
US2991940A (en) * 1957-07-11 1961-07-11 Gen Motors Corp Paint spray gun with detachable head
US3000576A (en) * 1960-03-01 1961-09-19 Spee Flo Company Spray gun
US3116020A (en) * 1961-10-05 1963-12-31 Nordson Corp Paint spray gun

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1551508A (en) * 1925-08-25 Pubs-injection vai
US2550888A (en) * 1948-01-13 1951-05-01 Jr Charles W Traughber Spray gun
US2557606A (en) * 1948-02-12 1951-06-19 Atlas Diesel Ab Adjustable stop for spray gun valve spindles
US2621970A (en) * 1950-06-02 1952-12-16 American Brake Shoe Co Spray gun
US2705663A (en) * 1952-08-08 1955-04-05 Robert I Gilbreath Spray gun
US2956752A (en) * 1956-08-31 1960-10-18 Spraying Systems Co Spray gun
US2969926A (en) * 1956-10-30 1961-01-31 Vilbiss Co Airless spray guns
US2991940A (en) * 1957-07-11 1961-07-11 Gen Motors Corp Paint spray gun with detachable head
US3000576A (en) * 1960-03-01 1961-09-19 Spee Flo Company Spray gun
US3116020A (en) * 1961-10-05 1963-12-31 Nordson Corp Paint spray gun

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380705A (en) * 1965-06-28 1968-04-30 Binks Mfg Co Spray gun
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US5094402A (en) * 1990-01-15 1992-03-10 Perret Jr Robert J High performance spray head
US20040262416A1 (en) * 2002-08-19 2004-12-30 Micheli Paul R. Spray gun having mechanism for internally swirling and breaking up a fluid
US7028916B2 (en) * 2002-08-19 2006-04-18 Illinois Tool Works Inc. Spray gun with improved pre-atomization fluid mixing and breakup
JP2004074155A (ja) * 2002-08-19 2004-03-11 Illinois Tool Works Inc <Itw> 改善された噴霧用スプレーガン
US20040046040A1 (en) * 2002-08-19 2004-03-11 Micheli Paul R. Spray gun with improved atomization
US7311271B2 (en) 2002-08-19 2007-12-25 Illinois Tool Works Inc. Spray gun having mechanism for internally swirling and breaking up a fluid
EP1391247A1 (de) * 2002-08-19 2004-02-25 Illinois Tool Works Inc. Sprühpistole mit verbesserter Mischkammer
US6808122B2 (en) * 2002-08-19 2004-10-26 Illinois Tool Works, Inc. Spray gun with improved pre-atomization fluid mixing and breakup
US20080048055A1 (en) * 2002-08-19 2008-02-28 Illinois Tool Works Inc. Spray gun having mechanism for internally swirling and breaking up a fluid
US20050006498A1 (en) * 2002-08-19 2005-01-13 Micheli Paul R. Spray gun with improved pre-atomization fluid mixing and breakup
US7762476B2 (en) * 2002-08-19 2010-07-27 Illinois Tool Works Inc. Spray gun with improved atomization
US20040031860A1 (en) * 2002-08-19 2004-02-19 Micheli Paul R. Spray gun with improved pre-atomization fluid mixing and breakup
US8640976B2 (en) 2002-08-19 2014-02-04 Paul R. Micheli Spray gun having mechanism for internally swirling and breaking up a fluid
KR101074842B1 (ko) 2002-08-19 2011-10-19 일리노이즈 툴 워크스 인코포레이티드 분무성능이 개선된 스프레이 건
US20040195369A1 (en) * 2003-02-28 2004-10-07 Strong Christopher L. One-piece fluid nozzle
US6935577B2 (en) 2003-02-28 2005-08-30 Illinois Tool Works Inc. One-piece fluid nozzle
US20050150981A1 (en) * 2003-02-28 2005-07-14 Strong Christopher L. One-piece fluid nozzle
US20040169093A1 (en) * 2003-02-28 2004-09-02 Strong Christopher L. One-piece fluid nozzle
US7497387B2 (en) 2003-02-28 2009-03-03 Illinois Tool Works Inc. One-piece fluid nozzle
US7926733B2 (en) 2004-06-30 2011-04-19 Illinois Tool Works Inc. Fluid atomizing system and method
US20060000928A1 (en) * 2004-06-30 2006-01-05 Micheli Paul R Fluid atomizing system and method
US7883026B2 (en) 2004-06-30 2011-02-08 Illinois Tool Works Inc. Fluid atomizing system and method
US20060214027A1 (en) * 2004-06-30 2006-09-28 Micheli Paul R Fluid atomizing system and method
US7992808B2 (en) 2004-06-30 2011-08-09 Illinois Tool Works Inc. Fluid atomizing system and method
US7568635B2 (en) 2004-09-28 2009-08-04 Illinois Tool Works Inc. Turbo spray nozzle and spray coating device incorporating same
US20060065760A1 (en) * 2004-09-28 2006-03-30 Micheli Paul R Turbo spray nozzle and spray coating device incorporating same
US20070221762A1 (en) * 2006-03-24 2007-09-27 Micheli Paul R Spray device having removable hard coated tip
US8684281B2 (en) 2006-03-24 2014-04-01 Finishing Brands Holdings Inc. Spray device having removable hard coated tip
US20080017734A1 (en) * 2006-07-10 2008-01-24 Micheli Paul R System and method of uniform spray coating
US8602326B2 (en) 2007-07-03 2013-12-10 David M. Seitz Spray device having a parabolic flow surface
US20090008469A1 (en) * 2007-07-03 2009-01-08 Illinois Tool Works Inc. Spray device having a parabolic flow surface
WO2015192896A1 (de) * 2014-06-18 2015-12-23 Vermes Microdispensing GmbH DOSIERVENTIL MIT VENTILSTÖßEL
US20230278053A1 (en) * 2018-04-01 2023-09-07 Graco Minnesota Inc. Spray gun and components for spraying paints and other coatings
US12583001B2 (en) * 2018-04-01 2026-03-24 Graco Minnesota Inc. Spray gun and components for spraying paints and other coatings
US11420223B2 (en) * 2018-06-15 2022-08-23 Veeco Instruments Inc. High pressure spray head
TWI808196B (zh) * 2018-06-15 2023-07-11 美商維克儀器公司 用於噴塗基材的裝置

Also Published As

Publication number Publication date
CH421771A (de) 1966-09-30
NL6402503A (de) 1964-09-14
GB996654A (en) 1965-06-30
DE1235779B (de) 1967-03-02

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