US3618863A - Atomizing nozzle assembly - Google Patents
Atomizing nozzle assembly Download PDFInfo
- Publication number
- US3618863A US3618863A US855304A US3618863DA US3618863A US 3618863 A US3618863 A US 3618863A US 855304 A US855304 A US 855304A US 3618863D A US3618863D A US 3618863DA US 3618863 A US3618863 A US 3618863A
- Authority
- US
- United States
- Prior art keywords
- pair
- paint
- nozzle
- axial
- radial holes
- 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
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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
- 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
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
Definitions
- This invention relates to spraying liquid, especially paint.
- Objects of the invention are to provide an improved sprayer in which even very heavy liquid can be finely atomized and yet which can be operated at low liquid and air pressures and with low air consumption, and is simple, reliable, selfcleaning, and inexpensive to make and use.
- Other objects include provision of a wide, fan-shaped spray of uniform qualities,-so that, e.g.,
- paint can be applied to even a smooth, nonporous surface in a thin, smooth, fast drying, tightly adhered coat, all without requiring separate air outlets for shaping the spray; reduction of forward momentum and overspray characteristics of the paint, yet wit increase in paint flow capability; provision for control of the fan dimensions and of solvent removal by adjustment of the air pressure; and provision of a nozzle that is insensitive to liquid viscosity or to its distance from the work surface, and in which there are no critical orifices to clog.
- the invention in one aspect features spraying paint by providing an atomizing' nozzle having a body with inlet and outlet ends and an axial flow passage therebetween, and as least a pair of coaxial radial holes into the passage spaced 180 apart intermediate the inlet and outlet ends; and supplying compressed air and paint to the nozzle at the inlet end and at the radial holes to produce a spray of atomized paint at the outlet end.
- air and paint are introduced through a single pair of radial 'holes to produce a fanshaped spray the long dimension of which is perpendicular to the common axis of those radial holes; air and paint are also introduced into the axial passage through a pair of openings arranged at the inlet end symmetrically at opposite sides of the nozzle axis and respectively angularly aligned with the two radial holes, each opening being shaped as a segment of a circle and having an area larger than that of a radial hole; air and paint are also introduced through an axial hole into the axial passage, and axial hole having an area less that that of either segment-shaped opening and of either radial hole; all air and paint is supplied through a reflector located upstream of the nozzle and having an axial opening and two additional openings arranged symmetrically at opposite sides of the axial opening, the three openings having their centers in a single plane perpendicular to the common axis of the radial holes, there also being small openings in
- the invention features producing a fanshaped spray of atomized liquid by introducing a compressible fluid into a nozzle with an axial flow passage through a pair of radial holes downstream of the nozzle inlet, the holes having a common axis perpendicular to the long dimension of the fan.
- FIG. 1 is a view of a conventional paint sprayer modified to embody the invention, with the aircap partly broken away, some of the elements inside the aircap being shown in section;
- FIG. 2 is an exploded perspective perspective view of some of the elements of FIG. 1.
- Conventional paint sprayer head 10, with needle valve paint outlet 12 surrounded by air outlets 14, is mounted inside aircap 16, which is adapted to be secured to a conventional compressed air-operated spray gun (not shown) by threaded retainer ring 18.
- Cap 16 has an indicating groove 17 (FIG. 2).
- Annular flange 20 of nozzle 22 is press fitted in the downstream end of axial bore 24 of cap 16, against flange 26 surrounding cap outlet 28 (outlet diameter 0.370
- Disc-shaped reflector 30 (outside diameter 0.496 is press fitted in counterbore 32 of cap 16, between nozzle 22 and head 10.
- Reflector 30 has a central hole 33 (diameter 0.1 11 midway between two holes 34 (each 0.144 in diameter) having axes spaced 0.290 and coplanar with the axis of hole 32.
- Central hole 33 is concentric with an imaginary circle (diameter 0.136) containing the centers of four equally spaced holes 36 (diameter 0.135) arranged symmetrically about the line of centers of holes 33 and 34.
- Nozzle 22 has a cylindrical wall 40 (outside diameter 0.346 inside diameter 0.260), open at its outlet end across 45 countersink 42, which is surrounded by flange 20.
- Axial inlet 44 (diameter 0.025) is provided in upstream end wall 46 which is relieved to provide two openings 48 into the nozzle, each opening 48 having the shape of a segment of a circle. 'The centers of openings 48 are respectively spaced angularly from the centers of holes 34.
- Two opposing coaxial radial holes 50 1 (each of diameter 0.073) through wall 40 are apart and tangent 'to countersink 42.
- the centers of inlet 44, openings 48, and holes 50 all lie in a single plane which is horizontal whenthe sprayer is oriented with groove 17 facing up (FIG. 2).
- Nozzle 22 atomizes the paint, which emerges from outlet 28 in a vertical, fan-shaped spray of very small droplets, due to the arrangement of holes 50 in a single opposing pair (although the spray would still be fan shaped if there were e. g., a pair of additional radial holes respectively spaced 90 from and smaller than holes 50.)
- Reflector 30 minimizes back spraying of paint against head 10, improves atomization, and, by the arrangement of holes 34 spaced 90 respectively from holes 50 and openings 48, increases the width of the fan.
- paint flow is 23 oz./minute, and airflow is 15 c.f.m. at 60 p.s.i.g. Air consumption decreases as paint flow is increased.
- an atomizing nozzle mounted downstream of a source of paint and compress air, said nozzle having a body with inlet and outlet ends in an axial flow passage extending therebetween, and
- a perforated reflector mounted between said source and said nozzle, said paint and air being supplied to said nozzle through said reflector.
- Paint-spraying apparatus comprising:
- an atomizing nozzle mounted downstream of a source of 5 paint and compressed air, said nozzle having a body with inlet and outlet ends and an axial flow passage therebetween, and
- each said inlet end opening has the shape of a segment of a circle.
- the apparatus of claim 8 further comprising an axial inlet hole to said axial passage of area less than that of either said inlet end opening and either said radial hole of said one pair.
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Abstract
Description
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85530469A | 1969-09-04 | 1969-09-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3618863A true US3618863A (en) | 1971-11-09 |
Family
ID=25320906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US855304A Expired - Lifetime US3618863A (en) | 1969-09-04 | 1969-09-04 | Atomizing nozzle assembly |
Country Status (1)
Country | Link |
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US (1) | US3618863A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3750947A (en) * | 1971-09-02 | 1973-08-07 | Energy Sciences Inc | Atomizing nozzle assembly |
US4258885A (en) * | 1979-03-23 | 1981-03-31 | Legeza Thomas B | Nozzle tip and method of manufacture |
US5603453A (en) * | 1994-12-30 | 1997-02-18 | Lab S.A. | Dual fluid spray nozzle |
US5849083A (en) * | 1994-10-11 | 1998-12-15 | Camden Extrusion Tool & Design | Die member in a cross-head die apparatus |
-
1969
- 1969-09-04 US US855304A patent/US3618863A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3750947A (en) * | 1971-09-02 | 1973-08-07 | Energy Sciences Inc | Atomizing nozzle assembly |
US4258885A (en) * | 1979-03-23 | 1981-03-31 | Legeza Thomas B | Nozzle tip and method of manufacture |
US5849083A (en) * | 1994-10-11 | 1998-12-15 | Camden Extrusion Tool & Design | Die member in a cross-head die apparatus |
US5603453A (en) * | 1994-12-30 | 1997-02-18 | Lab S.A. | Dual fluid spray nozzle |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GREEN, NORMAN E., STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARKER & HALE, A CA PARTNERSHIP;REEL/FRAME:004071/0640 Effective date: 19821112 Owner name: NATHANIEL HUGHES, STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARKER & HALE, A CA PARTNERSHIP;REEL/FRAME:004071/0640 Effective date: 19821112 Owner name: GREEN, NORMAN E. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PARKER & HALE, A CA PARTNERSHIP;REEL/FRAME:004071/0640 Effective date: 19821112 Owner name: NATHANIEL HUGHES Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PARKER & HALE, A CA PARTNERSHIP;REEL/FRAME:004071/0640 Effective date: 19821112 Owner name: VORTRAN CORPORATION, 315 SOUTH BEVERLY DRIVE, SUIT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:HUGHES, NATHANIEL;GREEN NORMAN E.;REEL/FRAME:004066/0868 Effective date: 19821116 |