US3000576A - Spray gun - Google Patents

Spray gun Download PDF

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Publication number
US3000576A
US3000576A US12092A US1209260A US3000576A US 3000576 A US3000576 A US 3000576A US 12092 A US12092 A US 12092A US 1209260 A US1209260 A US 1209260A US 3000576 A US3000576 A US 3000576A
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United States
Prior art keywords
spray
nozzle opening
paint
orifice
nozzle
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Expired - Lifetime
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US12092A
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English (en)
Inventor
Gustave S Levey
Stanton F Harvey
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SPEE FLO Co
SPEE-FLO Co
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SPEE FLO Co
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Application filed by SPEE FLO Co filed Critical SPEE FLO Co
Priority to US12092A priority Critical patent/US3000576A/en
Priority to GB6735/61A priority patent/GB933706A/en
Priority to DES72740A priority patent/DE1218322B/de
Priority to DES37071U priority patent/DE1858891U/de
Priority to BE600751A priority patent/BE600751A/fr
Priority to CH247961A priority patent/CH393148A/de
Application granted granted Critical
Publication of US3000576A publication Critical patent/US3000576A/en
Anticipated expiration legal-status Critical
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    • 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
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
    • 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
    • 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

Definitions

  • This invention relates to a spray gun for paint and the like, more particularly a gun for hydraulically atomizing and spraying paints and other liquids.
  • This pattern permits a continuous spray from the gun to be progressed along the surface being painted, in the direction of the short ⁇ dimension of the elliptically-shaped pattern, to produce a uniform strip having lateral margins feathered out so that subsequent parallel passes with the spray gun with the feathered margins of the patterns over-lapping permits the application of a uniform coating of the desired density over the entire surface.
  • Known forms of spray guns embody passageways adapted to be connected to a source of paint under high pressure, a valve body in the passageway with a valve port extending therethrough, a needle or ball pointed valve member movable in the passageway and arranged to seat on the upstream side of thevalve body to interrupt the flow and a spray nozzle secured to the gun on the downstream side of the valve plate.
  • Conventional spray nozzles have elongated or oval-shaped nozzle openings, the area of the opening varying from an area equal to that of a circle of .011 of an inch in diameter, to an area equal to that of a circle of about .035 of an inch in diameter. Thus the area of all of these openings is less ,than .001 square inch.
  • the valve port and al1 other passages upstream from the nozzle opening have been maintained substantially larger than the area of the nozzle opening to minimize pressure drop and flow restriction, and to impose high pressure on the nozzle, in an effort to obtain atomization.
  • the paint reached the nozzle under high pressure and with relatively low velocity, and was accelerated in the nozzle opening to the high velocity and low pressure of the spray fan, resulting in a vena contracta, which contributed to the undesirable distribution and atomization characteristic of the prior airless spray guns.
  • the paint moves as a submerged jet at high velocity and low pressure into the nozzle opening, spreading sufiiciently to fill the opening.
  • the vena contracte is eliminated, and uniform, complete atomization is effected.
  • a restricted orifice is provided between the valve and the nozzle so as to accelerate the paint to the desired high velocity.
  • the orifice is aligned with the central axis of the nozzle opening and discharges a submerged jet into a space of substantially larger diameter than the orifice, through which the jet travels and spreads sufficiently to fill the nozzle opening with high velocity paint.
  • the relatively large diameter valve por-t of the prior spray guns is retained unchanged, and a hole is bored into the large diameter chamber between the valve plate and the nozzle and connected to a return hose leadingl to the intake side of the pressure pump, so that the paint passes through the valve port at the same high velocity and low pressure with which it Passes .threyah and emerges from the nozzle opening, the excess quantity passing through the valve port because of its larger area being returned through the bleed hole to the intake side of the pump.
  • Each of these embodiments achieves the principal bjects of this invention of uniformly atomizing and distributing the paint in the spray fan, and producing a spray pattern with feathered margins.
  • FIG. 1 is a vertical section through an airless spray gun embodying the present invention
  • FIG. 2 is a greatly enlarged cross-section through the valve port and spray nozzle of a gun constructed according to this invention
  • FIG. 3 is an enlarged end elevation taken on the line 3-3 of FIG. 2 looking in the direction of the arrows;
  • FIG. 4 is a cross-section taken on the line 4 4 of FIG. 3 looking in the direction of the arrows;
  • FIG. 5 is a detailed cross-section through the spray nozzle taken on the line 5 5 of FIG. 4 looking in the direction of the arrows;
  • FIG. 5A is a further enlargement of the central portion of FIG. 5 showing the spray nozzle opening
  • FIG. 6 is a view similar to FIG. 2 on a somewhat smaller scale showing another embodiment of the present invention.
  • FIG. 7 is a view similar to FIG. 6 ⁇ showing further modification
  • FIG. 8 is a similar cross-section through a spray nozzle showing another embodiment of lthe present invention.
  • FIG. 9 is a representation of a painted strip produced by a spray gun embodying the present invention with a second spray pattern over-lapping the first strip.
  • the spray gun illustrated in FIG. 1 embodies a handle portion 10 having a forwardlyextending stock portion 11 to which is secured a spray portion 12 by means of a bolt 13.
  • the spray portion 12 has an axial bore 14 having an internally threaded portion 15 at its forward end and a reduced counterbore 16 at its rearward end.
  • Threaded fitting boss 17 opens into the lower side of the bore 14 and is formed to receive a combined swivel fitting and strainer holder 1S.
  • the fitting 18 includes an enlarged passage containing a strainer or filter 19 and at its lower end is threaded to receive a nut 2.@ within which is rotatably secured a swivel coupling member 21 adapted to be connected to the end of a flexible hose leading from a high pressure paint pump.
  • the coupling member 21 may be rotatably secured to the nut 2t?
  • the fitting 13 is formed with wrenching flats 18a so that it may be removed by holding the handle portion l0 and applying a wrench to the flats 18a thereby permitting the strainer 19 to be removed and replaced.
  • the swivel may be disconnected for repacking and the like by applying one wrench to the ats 18a and another to the nut 20.
  • the hose connected to ⁇ the fitting 2d may be branched, with a return line leading through a pressure reducing valve to the intake of the pump if it is desired to use a heater in the supply line.
  • a suitable pump and circulating system is disclosed in a co-pending application Serial No. 853,638, filed November 17, 1959, to which reference is made for a more complete disclosure of the structure and operation ofthe pump and arrangement of hoses and a heater.
  • the coupling 21 may be connected to a single hose leading to a source of paint under pressure, such as the outlet side of a pump.
  • a nut 23 is secured in the threaded end 15 of the bore 14 and secures a valve body 24 in position at the forward end of the bore 14.
  • the valve body 2.4 has an axial valve port Z5 extending therethrough, the inner or upstream end of which is adapted to be closed by a ball -valve 26 carried on an axially extending valve stem 27.
  • the valve stem is guided in the counterbore 16 and extends through a gland knut 2,8 which seals the free end of the counterbore 16.
  • the valve stem 27 is biased forwardly in any suitablev manner into position to seal the valve port 25.
  • a tubular member 3i) is adjustably threaded into a sleeve 31, the latter being secured in the handle portion 10.
  • the tubular member 3f! encloses a spring 32 arranged to urge forwardly a pusher sleeve 33 adjustably secured to the valve stem 27.
  • the forward end of the sleeve 33 has an abutment flange 34 adapted to be engaged by a pivoted trigger 35. Pressing the trigger 35 toward the handle portion 10 retracts the valve stem 27, opening the valve port 25.
  • the spray portion 12 at the forward end of the bore 14 is also external-ly threaded to receive a nut 36 which secures a spray nozzle assembly to the forward end of the gun.
  • the valve body 24 has a reduced portion 40 at its forward end which fits in a counterbore 41 in the nut 23
  • the valve body 214 may have a press fit within the nut 23 so that it is secured in place and sealed against fluid leakage, and the valve body itself is preferably made of hard erosion resistant material such as tungsten carbide.
  • the valve port 25 terminates in a flared seating surface 42 to engage the ball valve 26 and at its opposite end the port 25 communicates with a restricted orifice 43.
  • the orifice 43 is preferably a straight cylindrical hole with an axial. length from about two to ten times its diameter.
  • 'Ihe spray nozzle assembly 37 includes a holder 44 having an external flange 45 ⁇ to be engaged by an internal flange on the nut 36.
  • a spray tip 46 has a reduced forward end portion 47 and is press-fitted into a correspondingly shaped axial opening 4S in the holder 44.
  • the tip 46 is preferably formed of hard erosion resistant material such as tungsten carbide and has a relatively large bore 49 extending inwardly from the rearward end thereof.
  • a small bore 50 is formed through the forward portion of the tip 46 to form the spray nozzle opening.
  • the bore 49 terminates in a substantially perpendicular Wall or shoulder as illustrated.
  • a spacer sleeve 51 is fitted within the holder 44 and abuts against the rearward end of the tip 46 and against the forward face of the nut 23, being secured in leakproof relation by the nut 36,
  • the spacer sleeve 51 has an internal bore 52 which, as illustrated, is larger in diameter than the bore 49 in the tip 46 and is preferably at least as large in diameter as the bore 49.
  • the spray opening itself is formed as illustrated in FIGS. 3 to 5A.
  • a boss 55 Projecting forwardly from the reduced portion 47 of the tip 4f is a boss 55 which, as shown, may have flat side faces S6 and 57 and a curved end face 58.
  • a tapered slot S9 is cut transversely across the boss 55, the slot tapering to a narrow width equal to the desired width of the oval-shaped spray nozzle opening.
  • the bore 50 is initially formed as a blind bore terminating in a spherically-shaped end 6l) and the slot 59 is cut through the boss 55l far enough to intersect the bore 50.
  • the spray opening is an oval-shaped or elongated slot 61 having a long dimension equal to the diameter of the bore 50 and a short dimension equal to the minimum width of the tapered slot 59.
  • the restricted orifice 43 formed in the forward end of the valve body 24 is a circular bore' of a diameter such. that its area is equal to the area of the oval-shaped spray opening 61.
  • the bore 50 leading to the spray opening is larger in diameter than the orifice 43.
  • a high velocity stream or jet of paint moves axially out of the orifice 43, travels through the center of the space in the bores 49 and 52 as a submerged jet and enters the bore 50, spreading sufficiently in its passage through the bores 49 and 52 to fill completely the bore Sti.
  • the area of the orifice 43 being equal to the area ofY the nozzle opening 61, the pressure through the orifice 43 drops from the relatively high pressure existing in the valve port 25.
  • the paint is driven through the bore 50 and the spray nozzle 61 by the velocity of the submerged jet, with a relatively small pressure drop, rather than being driven through the nozzle opening by a high pressure-head on the upstream side of the nozzle as in the spray guns used heretofore.
  • the liquid paint in the bores 49 and 52 is likewise at a relatively low static pressure and is given a toroidal rolling action by lthe -action of the submerged jet, being driven forwardly with the jet near the axis and flowing rearwardly around the periphery of the bores 49 and 52.
  • the paint delivered through the nozzle opening 6.1 is completely and uniformly atornized as it passes the sharp outer edges of the nozzle opening and is driven forwardly in an oval-shaped spray fan.
  • the spray fan is completely or substantially free of any vena contracta and instead spreads uniformly in all directions as it moves away fro-rn the spray nozzle opening.
  • the spray fan produces a pattern such as illustrated diagrammatically in FIG. 9 with a central oval-shaped portion 62 constituting a paint film of uniform thickness and a feathered margin portion 63 in which the quantity of paint reduces uniformly towards the extreme edge of the pattern.
  • the operator can direct the spray fan against a surface to be painted and by moving the gun downwardly, or in the'direction of the narrow dimension of the pattern, can produce a uniformly painted strip such as 64 of any desired length.
  • a subsequent strip can be applied adjacent the first strip with the feathered margin portions over-lapping so that the thickness of the film is substantially uniform completely across the surface to be painted, the over-lapped marginal portions reinforcing each other as indicated at 65.
  • the optimum arrangement is one in which the cross-sectional area of the orifice 43 is equal to the area of the nozzle opening 61.
  • a slow drying enamel which must be applied in a thin coat to avoid runs and sags requires a nozzle opening having an area equal to the area of a circle .011 or .013 of an inch in diameter, whereas other materials require or permit openings with a larger area or with a smaller proportionate difference between the long and ⁇ short dimensions of the oval opening.
  • the orifice 43 be sufficiently long to establish a submerged jet which persists as a jet until it reaches and fills the bore 50 leading to the nozzle opening 61. At the same time it is desirable to keep the length of the orifice as short as possible so that it does not substantially reduce the volume of paint delivered from the nozzle opening under a given pressure-head.
  • the optimum axial length of the orifce 43 is about three times its diameter but that satisfactory results are obtained if its axial length is not less than two diameters. An axial length of the orifice 43 up to about ten times its diameter does not seriously interfere with the volume of paint or require excessively high pressures in the supply lines.
  • FIG. 6 A modified form of the invention is illustrated in FIG. 6.
  • the spray portion 112 of the gun and the nozzle assembly 137 are substantially identical with the parts 12 and 37, in the embodiment first described.
  • the restricted orifice is provided by an additional member instead of being formed in the end of the valve body 24.
  • the valve body 124 has a straight cylindrical bore 125 extending completely therethrough and closed at its inner end by a ball valve 126.
  • the nut 123 is formed with a reduced counterbore 141 providing a shoulder abutting against the forward end of the valve body 124 and is formed on its face with a recess snugly receiving a wafer 170.
  • the wafer 170 is made of hard material such as tungsten carbide and is formed at its center with the restricted orifice 143.
  • the wafer 170 abuts the spacer sleeve 151 which in turn abuts the spray tip 146, all of these parts being secured in leak-proof relation by the nut 136.
  • the orifice 143 is preferably a straight hole circular in cross-section with an area substantially equal to the cross-sectional area of the spray opening in the spray tip 146, the relation of the areas and spacing of the parts being the same as in the embodiment first described.
  • the wafer 170 may be made of a thickness to provide the desiredl axial length of the opening 143 which, as previously stated, may be from two to ten times the diameter of the pedal. While a particular wafer 170 with a given sized orifice 143 may be used with a range of sizes of spray nozzles within the limits described in connection with the first embodiment, it is also possible with this arrangement to provide a wafer 170 for each different size spray opening. In this way the optimum relation may always be maintained between the area of the spray opening and the area and axial length of the orifice 143.
  • FIG. 7 A further embodiment of the invention is illustrated in FIG. 7.
  • the restricted orifice 243 is formed in a Wafer or disc 270 having a central pilot 271 adapted to fit within the bore 249 in the spray tip 246.
  • the pilot 271 may be formed to fit snugly in the bore 249 so as to insure maintairing the orifice 243 exactly co-axial with the nozzle opening.
  • This pilot may, of course, be used in either of the embodiments previously disclosed and as explained in connection with FIG. 6 the disc 270 may be made interchangeable so as to provide the correct size and length of' orifice 243l for each different size of nozzle opening to be used on the gun.
  • a further embodiment of the invention is illustrated in PEG. 8.
  • no restricted orifice is used between the valve and the spray opening and instead the paint is accelerated to the desired velocity by forcing a greater volume through the valve body than is delivered through the spray opening.
  • the nut 323 is secured in the forward end of the bore 314 in the gun and supports the valve body 324.
  • the Valve body is provided with a straight cylindrical opening 325 which is preferably substantially larger in area than the largest spray nozzle to be used with the gun.
  • the nut 323 has a counterbore 341 which may be substantially the same diameter as the bore 325 in the valve body and forms a continuation thereof.
  • the counterbore 341 opens into the interior of the spacer sleeve 351 which in turn communicates with the enlarged bore 349 in the spray tip 346 in substantially the same way as the embodiment in FIGS. 1 to 5.
  • a radial hole 373 is drilled through the front fiange of the nut 323 leading from the counterbore 341 to the annular space 374 between the periphery of the nut 323 andthe interior of the nut 336.
  • Another radial hole 375 extends throughI the side wall of the nut 336 and is connected to a return line such as a hose 376 open substantially to atmospheric pressure, as by being connected to the intake side of the pressure pump or the like.
  • the radial holes- 373 and 375 are large enough in diameter to produce no substantial back-pressure, so that the pressure in the counterbore 341 is reduced substantially to atmospheric pressure.
  • This arrangement sho-wn in FIG. 8 4thus permits a. single valve body to be used with any of a wide range of different sizes of spray nozzle openings and delivers the paint through the nozzle opening without substantial change in velocity so that no vena contracta is formed in the spray fan and uniform atomization and the desired distribution of the paint is obtained in the same manner described in connection with the embodiments in FIGS. l to 7.
  • Means for hydraulically atomizing and spraying liquids comprising a body formed with a passageway adapted to be connected to a source of liquid under pressure and completely filled with such liquid, a spray tip secured to said body and having a nozzle opening extending therethrough, said nozzle opening being elongated in cross-section and being defined by converging Walls of said spray tip intersecting in a non-circular sharp edge, said nozzle opening having a cross-sectional area equal to the area of a circle having a diameter no greater than .035 of an inch and communicating with a portion of said passageway constituting a chamber having a crosssectional area substantially greater than that of said nozzle opening, means in said passageway forming a restricted orifice circular in cross-section and opening into said chamber and co-axial with said nozzle opening, said restricted orifice having an area no greater than about twice the area of said nozzle opening and having a uniform diameter no greater than about .035 of an inch through an axial length at least about twice its diameter, said or
  • Means for hydraulically atornizing and spraying liquids comprising a body formed with a passageway adapted to be connected to a source of liquid under pressure and completely filled with such liquid, a spray tip secured to said body and having a nozzle opening extending therethrough, said nozzle opening being elongated in cross-section and being defined by converging walls of said spray tip intersecting in a non-circular sharp edge, said nozzle opening having a cross-sectional area equal to the area of a circle having a diameter no greater than .035 of an inch and communicating with a portion of said passageway constituting a chamber having a cross-sectional area substantially greater than the area of said nozzle opening, means in said passageway forming a restricted orificev circular in cross-section and opening into said chamber and co-axial with said nozzle opening,lsaid restricted oriiice having an area between one-fourth and twice the area of said nozzle opening and having a uniform diameter no greater than about .035 of an inch through an axial length at least about twice
  • an airless paint spray gun of the type having a spray tip with a transversely elongated sharp-edged opening therethrough and a passageway in the gun for paint under pressure leading to said spray tip, a valve in said passageway to control the flow of paint to the spray tip, means to provide a feather-edged pattern for the spray comprising a disc in said passageway between said valve and said spray tip, a cylindrical projectio-n on the face ot said disc adjacent the spray tip, said projection having a paint discharge orifice therein aligned with the said opening in the spray tip, said spray tip having a cylindrical recess adjacent the cylindrical projection on said disc, said recess having an inner diameter corresponding to the outer diameter of said projection and fitting around the projection to maintain the paint discharge orifice therein aligned with the spray tip opening, said paint discharge orifice and said spray tip opening being spaced to form a paint chamber within said recess around the discharge jet going from the orifice in the projection to the opening in the spray tip.
  • Means for hydraulically atomizing and spraying paint comprising an airless spray gun having a passageway with an inlet adapted to be connected to a source of liquid paint under pressure, said passageway leading to a spray tip having a nozzle opening extending therethrough, said nozzle opening being elongated in cross-section and being defined by converging walls of said spray tip intersecting in a non-circular sharp edge, said nozzle opening having an area no greater than about .001 square inch, a valve body in said passageway having a valve seat surrounding a valve port, said valve port having a substantially larger area than said nozzle opening, a valve .member movable in said passageway for controlling the ⁇ flow of paint through said valve port, said gun including an enlarged chamber between said valve port and said nozzle opening, and means between said valve port and said nozzle opening, including an axially extending circular bore with a diameter substantially smaller than said chamber connecting said valve port with said chamber, said means creating a compact submerged jet of liquid paint moving axially through said chamber and into said
  • Means for hydraulically atomizing and spraying paint comprising an airless spray gun having a passageway with an inlet adapted to be connected to a source of liquid paint under pressure, said passagewayleading to a spray -tip having a nozzle opening extending therethrough, said nozzle opening being elongated in crosssection and being defined by converging walls of said spray tip intersecting in a non-circular sharp edge, a valve body in said passageway having a valve seat surrounding a valve port, said valve port having a substantially larger area than said nozzle opening, a valve member movable in said passageway for controlling the flow of paint through said valve port, said gun including an enlarged substantially cylindrical chamber between said valve port and said nozzle opening, and means between said valve and pressure of the paint passing -through said nozzle opening, said -means including an axially extending circular bore constituting the .inlet to said chamber from said valve port, said bore having an area no greater than about twice the area of said nozzle opening and having an axial Vlength greater than about twice its diameter
  • Means for hydraulically atomizing and spraying paint comprising an airless spray ⁇ gun having a passage' l lway with an inlet adapted to be connected to a source of liquid paint under pressure, said passageway leading to a spray tip having a nozzle opening extending therethrough, said nozzle opening being elongated in cross-section'and being defined by converging walls of said spray tip intersecting in a non-circular sharp edge, a valve body in said passageway having a valve seat surrounding a valve port, said valve port having a substantially larger area than said nozzle opening, a valve member -movable in said passageway for controlling the flow of paint through said valve port, said gun including an enlarged chamber between said valve port and said nozzle opening, and a separate member in said passageway between said valve body and said chamber formed with an axially extending circular bore having an axial length greater than about twice its diameter and no greater than about twice the area of said nozzle opening, said member creating a compact submerged jet of liquid paint moving axially through said enlarged chamber
  • Means for hydraulically atomizing and spraying paint comprising an airless spray gun having a passageway with an inlet adapted to be connected to a source of liquid paint under pressure, said passageway leading to a spray tip having a sharp-edged elongated nozzle opening extending therethrough, said nozzle opening having an area no greater than about .001 square inch, a valve body in said passageway having a valve seat surrounding a valve port, said valve port having a substantially larger cross-sectional area than said nozzle opening, a valve member movable in said passageway for controlling the flow of paint through said valve port, said -gun including an enlarged chamber between said valve port and said nozzle opening, and means between said valve port and said nozzle opening including an axially extending circular bore with a diameter substantially smaller than said chamber and substantially larger than said nozzle opening connecting said valve port with said chamber, and a bleed opening connecting said chamber with a low pressure zone having substantially atmospheric pressure, said means maintaining the static pressure in said chamber substantially atmospheric and creating a compact submerged jet of liquid paint
  • Means for hydraulically atomizing and spraying liquids comprising a body formed with a passageway adapted to be connected to a source of liquid under pressure and completely filled with such liquid, a spray tip secured to said body and having a nozzle opening extending therethrough, said nozzle opening being elongated in cross-section and being defined by converging Walls of said spray tip intersecting in a non-circular sharp edge, said nozzle opening having a cross-sectional area equal to the area of a circle having a diameter no greater than .035 of an inch and communicating with a portion of said passageway constituting a chamber having a cross-sectional area substantially greater than that of said nozzle opening, means in said passageway forming a restricted orifice circular in cross-section and opening into said chamber and co-aXial with said nozzle opening, said restricted orifice having an area substantially equal to the area of said nozzle opening and having a uniform diameter no greater than about .035 of an inch through an axial length at least about twice its diameter, said Kau
  • uid emerges from said nozzle opening as an atomized mist substantially uniformly distributed in an oval shaped pattern with feathered edges.

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US12092A 1960-03-01 1960-03-01 Spray gun Expired - Lifetime US3000576A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US12092A US3000576A (en) 1960-03-01 1960-03-01 Spray gun
GB6735/61A GB933706A (en) 1960-03-01 1961-02-23 Spray gun
DES72740A DE1218322B (de) 1960-03-01 1961-02-27 Spritzkopf fuer eine Spritzpistole zum Zerstaeuben fluessiger Farbe ohne Pressluft
DES37071U DE1858891U (de) 1960-03-01 1961-02-27 Spritzpistole.
BE600751A BE600751A (fr) 1960-03-01 1961-02-28 Procédé pour la projection de liquides tels que peintures et pistolet pour l'application dudit procédé ou procédé similaire
CH247961A CH393148A (de) 1960-03-01 1961-03-01 Sprühdüseneinheit für Spritzpistole und Verfahren zum Betrieb derselben

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12092A US3000576A (en) 1960-03-01 1960-03-01 Spray gun

Publications (1)

Publication Number Publication Date
US3000576A true US3000576A (en) 1961-09-19

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Application Number Title Priority Date Filing Date
US12092A Expired - Lifetime US3000576A (en) 1960-03-01 1960-03-01 Spray gun

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US (1) US3000576A (de)
BE (1) BE600751A (de)
CH (1) CH393148A (de)
DE (2) DE1858891U (de)
GB (1) GB933706A (de)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116020A (en) * 1961-10-05 1963-12-31 Nordson Corp Paint spray gun
US3168411A (en) * 1961-03-29 1965-02-02 United Shoe Machinery Corp Method of coating base and top coats
US3181798A (en) * 1962-07-18 1965-05-04 Spraying Systems Co Airless spray gun having spray and valve safety means
US3190564A (en) * 1963-03-11 1965-06-22 Atlas Copco Ab Spray coating apparatus for spraying liquid coating material under high pressure
US3219279A (en) * 1962-10-08 1965-11-23 Vilbiss Co Spray gun using high pressure coating material
US3246844A (en) * 1962-03-08 1966-04-19 Westinghouse Electric Corp Electrostatic painting apparatus for explosive atmospheres
US3248059A (en) * 1963-01-30 1966-04-26 Fischer & Co H G Spray gun
US3253782A (en) * 1966-02-02 1966-05-31 Fischer & Co H G Spray gun
US3265306A (en) * 1963-01-30 1966-08-09 Fischer & Co H G Spray gun
US3380705A (en) * 1965-06-28 1968-04-30 Binks Mfg Co Spray gun
DE2121986A1 (de) * 1970-05-06 1971-11-25 Electrogasdynamics Elektrostatisches Sprühverfahren und Vorrichtung zur Durchführung des Verfahrens
US3815820A (en) * 1963-04-12 1974-06-11 Ransburg Electro Coating Corp Hydrostatic atomizing apparatus
US3844487A (en) * 1972-01-21 1974-10-29 J Malec Airless spray gun
US3865314A (en) * 1974-02-19 1975-02-11 Said Levey By Said Moser Adjustable pattern spray gun
US3930619A (en) * 1974-11-18 1976-01-06 Gustave S. Levey Adjustable orifice spray gun
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US4128206A (en) * 1977-05-31 1978-12-05 Delavan Corporation Low drift flat spray nozzle and method
USRE30486E (en) * 1977-10-25 1981-01-20 Nozzle assemblies for atomizing and mixing different fluids and combining the mixture with solids and the like
US4258885A (en) * 1979-03-23 1981-03-31 Legeza Thomas B Nozzle tip and method of manufacture
US4258655A (en) * 1976-04-21 1981-03-31 Caterpillar Tractor Co. Electrostatic spray apparatus
US4349947A (en) * 1980-09-29 1982-09-21 Nordson Corporation Method for manufacturing an airless spray nozzle
WO1983000134A1 (en) * 1981-07-10 1983-01-20 Minnesota Mining & Mfg Aerosol fan sprayhead
US4401272A (en) * 1982-05-17 1983-08-30 Minnesota Mining And Manufacturing Company Aerosol fan sprayhead
DE3905452A1 (de) * 1989-02-22 1990-08-23 Agrotop Gmbh Flachstrahlduese
US5094402A (en) * 1990-01-15 1992-03-10 Perret Jr Robert J High performance spray head
US5615804A (en) * 1994-06-23 1997-04-01 Insta-Foam Products, Inc. Gun for dispensing fluent sealants or the like
US5887756A (en) * 1994-06-23 1999-03-30 Insta-Foam Products, Inc. Dispensing gun with valving rod and bellows-type seal
DE19743094A1 (de) * 1997-09-30 1999-04-01 Wap Reinigungssysteme Abschaltpistole für ein Hochdruckreinigungsgerät mit Antiverdreheinrichtung für den Hochdruckschlauch
EP0901834A3 (de) * 1997-09-11 2002-01-16 WAP Reinigungssysteme GmbH & Co. Handabschaltpistole für Hochdruckreinigungsgeräte
EP1393815A3 (de) * 2002-08-30 2006-01-18 Illinois Tool Works Inc. Hochdruckkugelventil und Ventilsitz
US20080296410A1 (en) * 2007-05-31 2008-12-04 Tritech Industries, Inc. One piece airless spray gun housing
US20140339093A1 (en) * 2013-05-20 2014-11-20 Apple Inc. Solid state deposition for cosmetic enhancement of anodized friction stir processed parts
US8944351B2 (en) 2011-05-06 2015-02-03 Saint-Gobain Abrasives, Inc. Paint cup assembly with an outlet valve
US9162240B2 (en) 2004-12-16 2015-10-20 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasie Liquid container system for a spray gun
US9586220B2 (en) 2011-06-30 2017-03-07 Saint-Gobain Abrasives, Inc. Paint cup assembly
US9675982B2 (en) 2013-09-16 2017-06-13 Graco Minnesota Inc. Spray tip and method of manufacture
US9951425B2 (en) 2013-07-25 2018-04-24 Apple Inc. Solid state deposition methods, apparatuses, and products
US10035156B2 (en) 2006-06-20 2018-07-31 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US10882064B2 (en) 2011-12-30 2021-01-05 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs Convertible paint cup assembly with air inlet valve
US10913079B2 (en) 2015-04-20 2021-02-09 Wagner Spray Tech Corporation Low pressure spray tip configurations
US11040360B2 (en) 2006-06-20 2021-06-22 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US11701670B2 (en) 2020-01-26 2023-07-18 Graco Minnesota Inc. Spray tip
US11865568B2 (en) 2018-03-15 2024-01-09 Wagner Spray Tech Corporation Spray tip design and manufacture

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US4483483A (en) * 1980-11-12 1984-11-20 Champion Spark Plug Company Gun for supplying compressed fluid
DE8803389U1 (de) * 1988-03-12 1988-05-19 J. Wagner GmbH, 7778 Markdorf Düsen-Wechselhalter für Hochdruck-Farbspritzpistolen
DE3835446A1 (de) * 1988-10-18 1990-04-19 Lechler Gmbh & Co Kg Duese zum zerstaeuben fluessiger medien, insbesondere flachstrahlduese
DE19814328C2 (de) * 1998-03-31 2000-07-27 Wagner Gmbh J Auftragvorrichtung

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US2052362A (en) * 1933-05-22 1936-08-25 Vilbiss Co Spray gun
US2214035A (en) * 1937-08-17 1940-09-10 Vilbiss Co Spray head
US2298934A (en) * 1939-02-28 1942-10-13 Miles T Foster Spray nozzle
US2362946A (en) * 1940-07-31 1944-11-14 Fmc Corp Spray gun
US2530206A (en) * 1942-10-31 1950-11-14 Colorator Ab Spray gun
US2569251A (en) * 1946-01-17 1951-09-25 Colorator Ab Spraying device and operation thereof
US2601893A (en) * 1949-08-26 1952-07-01 Fred W Funke Flame gun
US2676841A (en) * 1951-05-15 1954-04-27 Werner P Pohle Portable marking device
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Cited By (55)

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US3168411A (en) * 1961-03-29 1965-02-02 United Shoe Machinery Corp Method of coating base and top coats
US3116020A (en) * 1961-10-05 1963-12-31 Nordson Corp Paint spray gun
US3246844A (en) * 1962-03-08 1966-04-19 Westinghouse Electric Corp Electrostatic painting apparatus for explosive atmospheres
DE1257045B (de) * 1962-07-18 1967-12-21 Spraying Systems Co Spritzpistole
US3181798A (en) * 1962-07-18 1965-05-04 Spraying Systems Co Airless spray gun having spray and valve safety means
DE1291658B (de) * 1962-10-08 1969-03-27 Vilbiss Co Spritzpistole
US3219279A (en) * 1962-10-08 1965-11-23 Vilbiss Co Spray gun using high pressure coating material
US3248059A (en) * 1963-01-30 1966-04-26 Fischer & Co H G Spray gun
US3265306A (en) * 1963-01-30 1966-08-09 Fischer & Co H G Spray gun
DE1235779B (de) * 1963-03-11 1967-03-02 Atlas Copco Ab Spritzpistole
US3190564A (en) * 1963-03-11 1965-06-22 Atlas Copco Ab Spray coating apparatus for spraying liquid coating material under high pressure
US3815820A (en) * 1963-04-12 1974-06-11 Ransburg Electro Coating Corp Hydrostatic atomizing apparatus
US3380705A (en) * 1965-06-28 1968-04-30 Binks Mfg Co Spray gun
US3253782A (en) * 1966-02-02 1966-05-31 Fischer & Co H G Spray gun
DE2121986A1 (de) * 1970-05-06 1971-11-25 Electrogasdynamics Elektrostatisches Sprühverfahren und Vorrichtung zur Durchführung des Verfahrens
US3844487A (en) * 1972-01-21 1974-10-29 J Malec Airless spray gun
US3865314A (en) * 1974-02-19 1975-02-11 Said Levey By Said Moser Adjustable pattern spray gun
US3930619A (en) * 1974-11-18 1976-01-06 Gustave S. Levey Adjustable orifice spray gun
US4025045A (en) * 1975-07-21 1977-05-24 Spray Tech Corporation Nozzle guard for airless spray pistols
US4258655A (en) * 1976-04-21 1981-03-31 Caterpillar Tractor Co. Electrostatic spray apparatus
US4128206A (en) * 1977-05-31 1978-12-05 Delavan Corporation Low drift flat spray nozzle and method
USRE30486E (en) * 1977-10-25 1981-01-20 Nozzle assemblies for atomizing and mixing different fluids and combining the mixture with solids and the like
US4258885A (en) * 1979-03-23 1981-03-31 Legeza Thomas B Nozzle tip and method of manufacture
US4349947A (en) * 1980-09-29 1982-09-21 Nordson Corporation Method for manufacturing an airless spray nozzle
WO1983000134A1 (en) * 1981-07-10 1983-01-20 Minnesota Mining & Mfg Aerosol fan sprayhead
US4401272A (en) * 1982-05-17 1983-08-30 Minnesota Mining And Manufacturing Company Aerosol fan sprayhead
DE3905452A1 (de) * 1989-02-22 1990-08-23 Agrotop Gmbh Flachstrahlduese
US5094402A (en) * 1990-01-15 1992-03-10 Perret Jr Robert J High performance spray head
US5615804A (en) * 1994-06-23 1997-04-01 Insta-Foam Products, Inc. Gun for dispensing fluent sealants or the like
US5887756A (en) * 1994-06-23 1999-03-30 Insta-Foam Products, Inc. Dispensing gun with valving rod and bellows-type seal
EP0901834A3 (de) * 1997-09-11 2002-01-16 WAP Reinigungssysteme GmbH & Co. Handabschaltpistole für Hochdruckreinigungsgeräte
DE19743094A1 (de) * 1997-09-30 1999-04-01 Wap Reinigungssysteme Abschaltpistole für ein Hochdruckreinigungsgerät mit Antiverdreheinrichtung für den Hochdruckschlauch
EP1393815A3 (de) * 2002-08-30 2006-01-18 Illinois Tool Works Inc. Hochdruckkugelventil und Ventilsitz
US9162240B2 (en) 2004-12-16 2015-10-20 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasie Liquid container system for a spray gun
US10035156B2 (en) 2006-06-20 2018-07-31 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US12064783B2 (en) 2006-06-20 2024-08-20 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US11040360B2 (en) 2006-06-20 2021-06-22 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US11548018B1 (en) 2006-06-20 2023-01-10 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US11679399B2 (en) 2006-06-20 2023-06-20 Saint-Gobain Abrasives, Inc. Liquid supply assembly
US20080296410A1 (en) * 2007-05-31 2008-12-04 Tritech Industries, Inc. One piece airless spray gun housing
US9335198B2 (en) 2011-05-06 2016-05-10 Saint-Gobain Abrasives, Inc. Method of using a paint cup assembly
US8944351B2 (en) 2011-05-06 2015-02-03 Saint-Gobain Abrasives, Inc. Paint cup assembly with an outlet valve
US8998018B2 (en) 2011-05-06 2015-04-07 Saint-Gobain Abrasives, Inc. Paint cup assembly with an extended ring
US9586220B2 (en) 2011-06-30 2017-03-07 Saint-Gobain Abrasives, Inc. Paint cup assembly
US10882064B2 (en) 2011-12-30 2021-01-05 Saint-Gobain Abrasives, Inc./Saint-Gobain Abrasifs Convertible paint cup assembly with air inlet valve
US20140339093A1 (en) * 2013-05-20 2014-11-20 Apple Inc. Solid state deposition for cosmetic enhancement of anodized friction stir processed parts
US9611562B2 (en) * 2013-05-20 2017-04-04 Apple Inc. Solid state deposition for cosmetic enhancement of anodized friction stir processed parts
US9951425B2 (en) 2013-07-25 2018-04-24 Apple Inc. Solid state deposition methods, apparatuses, and products
US9675982B2 (en) 2013-09-16 2017-06-13 Graco Minnesota Inc. Spray tip and method of manufacture
US11292015B2 (en) 2013-09-16 2022-04-05 Graco Minnesota Inc. Spray tip and method of manufacture
US11813619B2 (en) 2013-09-16 2023-11-14 Graco Minnesota Inc. Spray tip and method of manufacture
US10525486B2 (en) 2013-09-16 2020-01-07 Graco Minnesota Inc. Spray tip and method of manufacture
US10913079B2 (en) 2015-04-20 2021-02-09 Wagner Spray Tech Corporation Low pressure spray tip configurations
US11865568B2 (en) 2018-03-15 2024-01-09 Wagner Spray Tech Corporation Spray tip design and manufacture
US11701670B2 (en) 2020-01-26 2023-07-18 Graco Minnesota Inc. Spray tip

Also Published As

Publication number Publication date
BE600751A (fr) 1961-06-16
DE1218322B (de) 1966-06-02
DE1858891U (de) 1962-09-20
GB933706A (en) 1963-08-08
CH393148A (de) 1965-05-31

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