US3858812A - Spray nozzle for low pressure spray and uniform spray pattern - Google Patents

Spray nozzle for low pressure spray and uniform spray pattern Download PDF

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Publication number
US3858812A
US3858812A US418728A US41872873A US3858812A US 3858812 A US3858812 A US 3858812A US 418728 A US418728 A US 418728A US 41872873 A US41872873 A US 41872873A US 3858812 A US3858812 A US 3858812A
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Prior art keywords
nozzle
passage
spray
protuberances
orifice
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US418728A
Inventor
Robert P Williams
Ted Lee Butterfield
Lyle J Emory
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Spraying Systems Co
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Spraying Systems Co
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Priority to US418728A priority Critical patent/US3858812A/en
Application filed by Spraying Systems Co filed Critical Spraying Systems Co
Priority to DK607074AA priority patent/DK140686B/en
Priority to CA214,387A priority patent/CA1014192A/en
Priority to IT54167/74A priority patent/IT1023347B/en
Priority to JP13321474A priority patent/JPS5650623B2/ja
Priority to SE7414646A priority patent/SE407161B/en
Priority to FR7438412A priority patent/FR2252134B1/fr
Priority to AU75638/74A priority patent/AU479387B2/en
Priority to GB50692/74A priority patent/GB1486437A/en
Priority to DE2455738A priority patent/DE2455738C3/en
Application granted granted Critical
Publication of US3858812A publication Critical patent/US3858812A/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
    • B05B1/048—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 having a flow conduit with, immediately behind the outlet orifice, an elongated cross section, e.g. of oval or elliptic form, of which the major axis is perpendicular to 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
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/40—Filters located upstream of the spraying outlets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49432—Nozzle making
    • Y10T29/49433—Sprayer

Definitions

  • the present invention is directed to improvements in spray nozzles and is particularly concerned with improvements in nozzles intended for low pressure spraymg.
  • nozzle wear is directly related to spraying pressures.
  • Use of relatively low pressure spraying increases the useful life of a nozzle by slowing the eroding effects of fluid on the nozzle passages.
  • wear is undesirable because a relatively small amount of nozzle wear can result in an undesirable increase in nozzle capacity.
  • Increase in nozzle capacity is especially harmful when the nozzle is used for spraying chemicals, where an undesirable increase in the quantity of chemicals sprayed results in a waste of chemical and may result in damage to crops, etc.
  • low pressure spraying provides further advantage in that it enables a larger particle size in the sprayed fluid.
  • the larger particle size is highly desirable in certain types of spraying as, for example, agricultural spraying wherein larger particle sizes reduce drifting of sprayed chemicals.
  • Particle size is dependent upon the degree of atomization of fluid and this is directly related to operating pressures utilized with a nozzle. As operating pressures are reduced, the degree of atomization is reduced while fluid particle size in the sprayed fluid is increased. Particle size decreases as spraying pressures are increased.
  • the major purposes of the present invention are to form spray nozzles in such a manner that relatively large particle size is achieved at relatively low operating pressures while the spray pattern formed by the nozzle at the low operating pressures produces a more nearly uniform distribution of the spray pattern without the characteristic heavy edges found in prior nozzles, and at the same time enable these objects with simple and inexpensive structure.
  • FIG. 1 is a cross-sectional view of a typical nozzle assembly in which the present invention may be used;
  • FIG. 2 is an end view of the nozzle illustrated in FIG.
  • FIG. 3 is a cross-sectional view of a nozzle utilizing the principle of the present invention and taken along section lines 3-3 of FIG. 2;
  • FIG. 4 is a cross-sectional view of the nozzle of FIG. 3 but taken along section lines 4-4 of FIG. 2 and at right angles to the section illustrated in FIG. 3;
  • FIG. 5 is an end view of the nozzle of FIGS. 3 and I when looking at the entrance end of the nozzle passage and opposite to the direction of the view illustrated in FIG. 2;
  • FIG. 6 is a sectional view illustrating a method of forming the nozzle of FIGS. 3, 4 and 5;
  • FIG. 7 is a sectional view of another nozzle embodiment incorporating the principles of the present inventron.
  • FIG. 8 is a cross-sectional view of the nozzle illustrated in FIG. 7, with the section being taken on a plane extending at right angles to the section shown in FIG.
  • FIG. 9 is an end view of the nozzle of FIGS. 7 and 8 when looking at the entrance end of the nozzle orifice passage;
  • FIG. 10 is a diagram of a spray pattern produced with the present invention.
  • FIG. 11 is a diagram of a spray pattern having the undesirable heavy edges.
  • a nozzle assembly like that of Wahlin U.S. Pat. No. 2,745,701 is illustrated.
  • the assembly includes a body 10 having a large cylindrical opening 11 therethrough, a flat sided nozzle tip 12 which is made as a separate part and secured to the outer end of the body 10, a strainer 13 in the cylindrical opening 11 of the body and having an annular flange 14 at the outer end thereof interposed between the nozzle tip 12 and the outer end of the body 10, and a coupling 15 by which the nozzle tip 12 is secured to the body 10.
  • the body 10 is internally threaded at 16 at its end remote from the tip 12 for connection to a pipe or other means through which liquid is supplied to the nozzle and the other end of the body is externally threaded at 17 for threaded connection therewith of the coupling 15.
  • Coupling 15 is of a collar nut type with the outer end of the collar turned in as at 15a to engage over an annular flange 18 at the base of the nozzle tip for clamping the latter against the outer end of the strainer 13 and the strainer flange 14 against the outer end of the nozzle body.
  • the coupling 15 and body 10 each have a portion of the length thereof of external hexagonal form as indicated at 19 and 20 respectively, or of other suitable form for engagement with a wrench for coupling and uncoupling the parts.
  • the illustrated strainer 13 has a hollow cylindrical body 21 surrounded by a cylindrical screen 22.
  • the strainer body 21 has a series of transverse slots 24 through its wall, preferably at several places therearound, for example at diametrically opposed sides thereof, so that the liquid introduced through the lower end of the nozzle passes through the screen into the interior of the strainer body 21.
  • the nozzle tip 12 has a large bored out cavity or counterbore 26 communicating with the interior of the strainer body 21 and leading to a relatively small diameter bore or cylindrical passage 27 with convex or dome shaped outer end 28 through which the spray orifice 29 is formed.
  • the orifice 29 is preferably recessed in the end of the nozzle at the bottom of a channel or groove 30 which extends in a direction across the nozzle end, and at its bottom, this groove 30 is provided with a small groove 31 usually of V-shape as shown, which cuts through and intersects the dome shaped outer end 28 of the bore or passage 27 to form the orifice opening 29 which is of long narrow shape and of an arcuate contour from end to end corresponding to the rounded end 28 of the bore 27 at the place where the orifice extends thereacross.
  • the nozzle body opening 11, the relatively large nozzle tip cavity 26, and the small diameter bore 27, conjointly provide a passageway through which liquid is supplied to the orifice 29, and because of the small diameter of the bore 27, the liquid flows therethrough to the orifice 29 at a highly accelerated rate.
  • the bore 27 is made with an abrupt shoulder around the entrance, substantially as shown at 32 in FIGS. 4 and 7, and is of a considerable length relative to the diameter thereof to insure a long straight path of accelerated flow of liquid before it reaches the orifice 29.
  • Nozzles of this type may have a stepped bore configuration leading to the nozzle orifice passage as illustrated by the inner bore 26 and counterbore 26a in FIGS. 3 and 4.
  • the depth of the counterbore may vary and may in some instances be omitted as is illustrated in the showing of the nozzle in FIG. 1.
  • the entrance end of the nozzle orifice passage is restricted on opposite sides thereof by forming spaced and generally parallel protuberances therein. This is illustrated at 34 and 35 in FIGS. 4, and 6. This produces a generally oval cross-sectional configuration at the entrance end of the nozzle orifice passage 27, while the remainder of the nozzle orifice passage leading to the orifice is of uniform circular cross-sectional shape.
  • the length of this restriction should be on the order of approximately one-third of the length of the nozzle orifice passage.
  • the restriction at the entrance end of the nozzle orifice passage may be conveniently accomplished through use of a staking tool 36 which, as illustrated in FIG. 6, is inserted into the bore 26 of the nozzle body leading to the orifice passage. Diametrically spaced, staking tips 37 and 38 of the staking tool 36 are then forced into the wall or shoulder of the bore surrounding the nozzle orifice passage 27. This results in the formation of diametrically spaced and generally parallel V- shaped depressions 39 as viewed in cross-section in FIG. 6. This staking operation deforms or upsets the metal surrounding the nozzle orifice passage so as to force the metal toward the axis of the passage 27 to thereby form the protuberances 34 and 35.
  • the nozzle body is illustrated at 12, and the spray pattern is designated at P.
  • the pattern is shown as having a tapered form indicating generally uniform distribution throughout the pattern and with generally uniform distribution from end to end of the pattern. This is the pattern desired with low pressure spraying operation as accomplished by use of nozzles embody ing the present invention. This is distinguished from spray patterns as illustrated in FIG. 11 wherein a prior nozzle is designated at N, while the spray pattern resulting from use of the nozzles at relatively low spraying pressures is designated at P.
  • the heavy edges referred to are diagrammatically shown at the ends of the pattern and designated by the letter E. It is this heavy distribution at the ends of the pattern defined by the nozzle that is undesirable in prior nozzles at low spraying pressures.
  • the staking actions and thus the protuberances produced thereby be aligned along a plane extending perpendicular to the major axis of the elongated orifice 27 in the nozzle.
  • the result of the protuberances is to produce a spray pattern having a pattern of distribution of the form illustrated in FIG. 10 wherein the pattern is more or less tapered and shaped during low pressure operation as distinguished from the relatively heavy edges to the pattern produced with other nozzles as illustrated in FIg. 11.
  • FIG. 7 illustrates a modified form of the invention.
  • the nozzle body is designated at 12 and is formed with an orifice passage 27 and outlet orifice in a manner similar to that illustrated in FIGS. 1-3.
  • protuberances at the entrance end of the orifice passage are defined in a separate insert disc 40 which is positioned in the passage of larger diameter adjoining the nozzle orifice passage 27. The insert abuts the shoulder 32.
  • This may be conveniently formed by molding or otherwise forming the protuberances 40a and 40b which define the more or less oval-like crosssectional shape (FIG. 9) for the passage 400 therethrough to the orifice passage in a disposition similar to that illustrated in FIGS. l-5.
  • a spray nozzle suitable for use at relatively low spraying pressures and for defining a spray pattern of oval-shaped form and with a tapered distribution of the spray pattern at the edges thereof comprising a nozzle body having a cylindrical passage therein, said passage having an open entrance end and a discharge end terminating at a wall extending across the passage, an orifice in said wall and extending across the axis of said passage, said orifice being disposed symmetrically relative to the axis of said passage and being oval in form, said passage having a plurality of spaced protuberances formed in the wall thereof adjacent the entrance end of the passage whereby the entrance end of the passage has a generally oval cross-sectional shape, said protuberances extending from the entrance end of said passage toward said discharge end by a short distance.

Abstract

A spray nozzle with spaced projections at the entrance end of the nozzle passage leading to the orifice to promote uniformity of spray.

Description

United StatesPatent [1 1 Williams et al.
[ Jan. 7, 1975 SPRAY NOZZLE FOR LOW PRESSURE SPRAY AND UNIFORM SPRAY PATTERN [75] Inventors: Robert P. Williams; Ted Lee Butterfield, both of Naperville; Lyle J. Emory, Darien, all of Ill.
[73] Assignee: Spraying Systems Co., Wheaton, Ill.
[22] Filed: Nov. 23, 1973 [21] Appl. No.: 418,728
[52] US Cl. 239/599, 239/601 [51] Int. Cl B05 b 1/00 [58] Field of Search 239/601, 599, DIG. l, 592
[ 56] References Cited UNITED STATES PATENTS 2,683,626 7/1954 Wahlin 239/599 2,701,412 2/1955 Wahlin 1. 239/599 3,045,932 7/1962 Steinen 3,754,710 8/1973 Chimara 239/601 FOREIGN PATENTS OR APPLICATIONS 717,464 10/1954 Great Britain 239/592 Primary Examiner-Lloyd L. King Attorney, Agent, or Firm-Mann, Brown, McWilliams & Bradway [57] ABSTRACT A spray nozzle with spaced projections at the entrance end of the nozzle passage leading to the orifice to promote uniformity of spray.
6 Claims, 11 Drawing Figures PATENTED JAN 7 I975 3, 858. 812
PATENTEDJA" 1815 I v 3.858.812
I SHEEI 20F 2 SWEDGED ORIFICE SPRAY NOZZLE FOR LOW PRESSURE SPRAY AND UNIFORM SPRAY PATTERN The present invention is directed to improvements in spray nozzles and is particularly concerned with improvements in nozzles intended for low pressure spraymg.
There are a number of advantages to low pressure spraying operations. For example, nozzle wear is directly related to spraying pressures. Use of relatively low pressure spraying increases the useful life of a nozzle by slowing the eroding effects of fluid on the nozzle passages. In this respect, wear is undesirable because a relatively small amount of nozzle wear can result in an undesirable increase in nozzle capacity. Increase in nozzle capacity is especially harmful when the nozzle is used for spraying chemicals, where an undesirable increase in the quantity of chemicals sprayed results in a waste of chemical and may result in damage to crops, etc. Also, low pressure spraying provides further advantage in that it enables a larger particle size in the sprayed fluid. The larger particle size is highly desirable in certain types of spraying as, for example, agricultural spraying wherein larger particle sizes reduce drifting of sprayed chemicals. Particle size is dependent upon the degree of atomization of fluid and this is directly related to operating pressures utilized with a nozzle. As operating pressures are reduced, the degree of atomization is reduced while fluid particle size in the sprayed fluid is increased. Particle size decreases as spraying pressures are increased.
While the advantages of low pressure spraying have been evident, previous nozzles have not been suitable at low spraying pressures because previous nozzles tended to produce heavy edges (undesirable and relatively large amounts of fluid) at the ends of the spray patterns. Attempts have been made to reduce the tendency to produce the heavy edge patterns as, for example, in Wahlin U.S. Pat. Nos. 2,745,701, and Levey patent 3,000,576. The Wahlin patent utilizes a circular bead at the entrance end of the nozzle passage and, while nozzles formed in this manner produce a substan tially uniform distribution of spraying at the edges at relatively high operating pressures, this effect is not as well defined at relatively low operating pressures as, for example, -20 p.s.i.g. Generally speaking, the present day operating pressures for agricultural purposes range from 30-60 p.s.i.g., and even higher in some cases. Levey et al. U.S. Pat. No. 3,000,576 uses a special passage configuration having a restricted orifice between the liquid supply and the nozzle passage for purposes of enabling high velocity, but low pressure flow. This arrangement produces a relatively high degree of particle atomization and does not produce the large particle size desired as aforementioned.
With the foregoing in mind, the major purposes of the present invention are to form spray nozzles in such a manner that relatively large particle size is achieved at relatively low operating pressures while the spray pattern formed by the nozzle at the low operating pressures produces a more nearly uniform distribution of the spray pattern without the characteristic heavy edges found in prior nozzles, and at the same time enable these objects with simple and inexpensive structure.
These and other purposes of the invention will become more apparent in the course of the ensuing specification and claims, when taken with the accompanying drawings, in which:
FIG. 1 is a cross-sectional view of a typical nozzle assembly in which the present invention may be used;
FIG. 2 is an end view of the nozzle illustrated in FIG.
FIG. 3 is a cross-sectional view of a nozzle utilizing the principle of the present invention and taken along section lines 3-3 of FIG. 2;
FIG. 4 is a cross-sectional view of the nozzle of FIG. 3 but taken along section lines 4-4 of FIG. 2 and at right angles to the section illustrated in FIG. 3;
FIG. 5 is an end view of the nozzle of FIGS. 3 and I when looking at the entrance end of the nozzle passage and opposite to the direction of the view illustrated in FIG. 2;
FIG. 6 is a sectional view illustrating a method of forming the nozzle of FIGS. 3, 4 and 5;
FIG. 7 is a sectional view of another nozzle embodiment incorporating the principles of the present inventron;
FIG. 8 is a cross-sectional view of the nozzle illustrated in FIG. 7, with the section being taken on a plane extending at right angles to the section shown in FIG.
FIG. 9 is an end view of the nozzle of FIGS. 7 and 8 when looking at the entrance end of the nozzle orifice passage;
FIG. 10 is a diagram of a spray pattern produced with the present invention; and
FIG. 11 is a diagram of a spray pattern having the undesirable heavy edges.
Like elements are described by like characters throughout the specification and claims.
Referring specifically now to the drawing, a nozzle assembly like that of Wahlin U.S. Pat. No. 2,745,701 is illustrated. The assembly includes a body 10 having a large cylindrical opening 11 therethrough, a flat sided nozzle tip 12 which is made as a separate part and secured to the outer end of the body 10, a strainer 13 in the cylindrical opening 11 of the body and having an annular flange 14 at the outer end thereof interposed between the nozzle tip 12 and the outer end of the body 10, and a coupling 15 by which the nozzle tip 12 is secured to the body 10.
The body 10 is internally threaded at 16 at its end remote from the tip 12 for connection to a pipe or other means through which liquid is supplied to the nozzle and the other end of the body is externally threaded at 17 for threaded connection therewith of the coupling 15. Coupling 15 is of a collar nut type with the outer end of the collar turned in as at 15a to engage over an annular flange 18 at the base of the nozzle tip for clamping the latter against the outer end of the strainer 13 and the strainer flange 14 against the outer end of the nozzle body. The coupling 15 and body 10 each have a portion of the length thereof of external hexagonal form as indicated at 19 and 20 respectively, or of other suitable form for engagement with a wrench for coupling and uncoupling the parts.
The illustrated strainer 13 has a hollow cylindrical body 21 surrounded by a cylindrical screen 22. The strainer body 21 has a series of transverse slots 24 through its wall, preferably at several places therearound, for example at diametrically opposed sides thereof, so that the liquid introduced through the lower end of the nozzle passes through the screen into the interior of the strainer body 21.
The nozzle tip 12 has a large bored out cavity or counterbore 26 communicating with the interior of the strainer body 21 and leading to a relatively small diameter bore or cylindrical passage 27 with convex or dome shaped outer end 28 through which the spray orifice 29 is formed.
The orifice 29 is preferably recessed in the end of the nozzle at the bottom of a channel or groove 30 which extends in a direction across the nozzle end, and at its bottom, this groove 30 is provided with a small groove 31 usually of V-shape as shown, which cuts through and intersects the dome shaped outer end 28 of the bore or passage 27 to form the orifice opening 29 which is of long narrow shape and of an arcuate contour from end to end corresponding to the rounded end 28 of the bore 27 at the place where the orifice extends thereacross.
Thus the nozzle body opening 11, the relatively large nozzle tip cavity 26, and the small diameter bore 27, conjointly provide a passageway through which liquid is supplied to the orifice 29, and because of the small diameter of the bore 27, the liquid flows therethrough to the orifice 29 at a highly accelerated rate.
Generally the bore 27 is made with an abrupt shoulder around the entrance, substantially as shown at 32 in FIGS. 4 and 7, and is of a considerable length relative to the diameter thereof to insure a long straight path of accelerated flow of liquid before it reaches the orifice 29.
Nozzles of this type may have a stepped bore configuration leading to the nozzle orifice passage as illustrated by the inner bore 26 and counterbore 26a in FIGS. 3 and 4.
The depth of the counterbore may vary and may in some instances be omitted as is illustrated in the showing of the nozzle in FIG. 1.
In accordance with the present invention, the entrance end of the nozzle orifice passage is restricted on opposite sides thereof by forming spaced and generally parallel protuberances therein. This is illustrated at 34 and 35 in FIGS. 4, and 6. This produces a generally oval cross-sectional configuration at the entrance end of the nozzle orifice passage 27, while the remainder of the nozzle orifice passage leading to the orifice is of uniform circular cross-sectional shape. The length of this restriction should be on the order of approximately one-third of the length of the nozzle orifice passage.
The restriction at the entrance end of the nozzle orifice passage may be conveniently accomplished through use of a staking tool 36 which, as illustrated in FIG. 6, is inserted into the bore 26 of the nozzle body leading to the orifice passage. Diametrically spaced, staking tips 37 and 38 of the staking tool 36 are then forced into the wall or shoulder of the bore surrounding the nozzle orifice passage 27. This results in the formation of diametrically spaced and generally parallel V- shaped depressions 39 as viewed in cross-section in FIG. 6. This staking operation deforms or upsets the metal surrounding the nozzle orifice passage so as to force the metal toward the axis of the passage 27 to thereby form the protuberances 34 and 35.
The result of this upsetting operation which provides a noncircular entrance end of the nozzle orifice passage is to break up the flow direction through the orifice passage and produce a turbulent condition.
The effect of this operation is to enable a liquid flow pattern as is illustrated in FIG. 10.
In FIG. 10 the nozzle body is illustrated at 12, and the spray pattern is designated at P. The pattern is shown as having a tapered form indicating generally uniform distribution throughout the pattern and with generally uniform distribution from end to end of the pattern. This is the pattern desired with low pressure spraying operation as accomplished by use of nozzles embody ing the present invention. This is distinguished from spray patterns as illustrated in FIG. 11 wherein a prior nozzle is designated at N, while the spray pattern resulting from use of the nozzles at relatively low spraying pressures is designated at P. The heavy edges referred to are diagrammatically shown at the ends of the pattern and designated by the letter E. It is this heavy distribution at the ends of the pattern defined by the nozzle that is undesirable in prior nozzles at low spraying pressures.
It is preferred that the staking actions and thus the protuberances produced thereby be aligned along a plane extending perpendicular to the major axis of the elongated orifice 27 in the nozzle.
The result of the protuberances is to produce a spray pattern having a pattern of distribution of the form illustrated in FIG. 10 wherein the pattern is more or less tapered and shaped during low pressure operation as distinguished from the relatively heavy edges to the pattern produced with other nozzles as illustrated in FIg. 11.
FIG. 7 illustrates a modified form of the invention. In this figure the nozzle body is designated at 12 and is formed with an orifice passage 27 and outlet orifice in a manner similar to that illustrated in FIGS. 1-3. In FIG. 7, protuberances at the entrance end of the orifice passage are defined in a separate insert disc 40 which is positioned in the passage of larger diameter adjoining the nozzle orifice passage 27. The insert abuts the shoulder 32. This may be conveniently formed by molding or otherwise forming the protuberances 40a and 40b which define the more or less oval-like crosssectional shape (FIG. 9) for the passage 400 therethrough to the orifice passage in a disposition similar to that illustrated in FIGS. l-5.
We claim:
1. A spray nozzle suitable for use at relatively low spraying pressures and for defining a spray pattern of oval-shaped form and with a tapered distribution of the spray pattern at the edges thereof, comprising a nozzle body having a cylindrical passage therein, said passage having an open entrance end and a discharge end terminating at a wall extending across the passage, an orifice in said wall and extending across the axis of said passage, said orifice being disposed symmetrically relative to the axis of said passage and being oval in form, said passage having a plurality of spaced protuberances formed in the wall thereof adjacent the entrance end of the passage whereby the entrance end of the passage has a generally oval cross-sectional shape, said protuberances extending from the entrance end of said passage toward said discharge end by a short distance.
2. A nozzle as defined in claim 1 wherein said protuberances are formed by upsetting the wall defining the approach area of the nozzle passage.
3. A nozzle as defined in claim I wherein said protuberances are aligned with a line perpendicular to the major axis of said orifice.
4. A nozzle as defined in claim 1 wherein the nozzle is defined by a single body of material.
5. A nozzle as defined in claim 1 wherein said body is defined by a multi-piece assembly of material, at least two of said pieces defining said cylindrical passage, one 5 of said pieces being disposed at the entrance end of said passage and having said protuberances therein.
said protuberances.

Claims (6)

1. A spray nozzle suitable for use at relatively low spraying pressures and for defining a spray pattern of oval-shaped form and with a tapered distribution of the spray pattern at the edges thereof, comprising a nozzle body having a cylindrical passage therein, said passage having an open entrance end and a discharge end terminating at a wall extending across the passage, an orifice in said wall and extending across the axis of said passage, said orifice being disposed symmetrically relative to the axis of said passage and being oval in form, said passage having a plurality of spaced protuberances formed in the wall thereof adjacent the entrance end of the passage whereby the entrance end of the passage has a generally oval cross-sectional shape, said protuberances extending from the entrance end of said passage toward said discharge end by a short distance.
2. A nozzle as defined in claim 1 wherein said protuberances are formed by upsetting the wall defining the approach area of the nozzle passage.
3. A nozzle as defined in claim 1 wherein said protuberances are aligned with a line perpendicular to the major axis of said orifice.
4. A nozzle as defined in claim 1 wherein the nozzle is defined by a single body of material.
5. A nozzle as defined in claim 1 wherein said body is defined by a multi-piece assembly of material, at least two of said pieces defining said cylindrical passage, one of said pieces being disposed at the entrance end of said passage and having said protuberances therein.
6. A nozzle as defined in claim 1 wherein said body has a counterbore defining a shoulder around the entrance end of said cylindrical passage, said shoulder having grooves therein adjacent the material defining said protuberances.
US418728A 1973-11-23 1973-11-23 Spray nozzle for low pressure spray and uniform spray pattern Expired - Lifetime US3858812A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US418728A US3858812A (en) 1973-11-23 1973-11-23 Spray nozzle for low pressure spray and uniform spray pattern
CA214,387A CA1014192A (en) 1973-11-23 1974-11-21 Spraying nozzle for low pressure spray and uniform spray pattern
IT54167/74A IT1023347B (en) 1973-11-23 1974-11-21 IMPROVEMENT IN SPRAYING NOZZLES IN PARTICULAR FOR BAS SA PRESSURE
JP13321474A JPS5650623B2 (en) 1973-11-23 1974-11-21
DK607074AA DK140686B (en) 1973-11-23 1974-11-21 Spray nozzle for low pressure spraying.
SE7414646A SE407161B (en) 1973-11-23 1974-11-21 SPRAY NOZZLE
FR7438412A FR2252134B1 (en) 1973-11-23 1974-11-22
AU75638/74A AU479387B2 (en) 1973-11-23 1974-11-22 Spray nozzle for low pressure spray and uniform spray pattern
GB50692/74A GB1486437A (en) 1973-11-23 1974-11-22 Spray nozzle for low pressure spray
DE2455738A DE2455738C3 (en) 1973-11-23 1974-11-25 Spray nozzle

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Application Number Priority Date Filing Date Title
US418728A US3858812A (en) 1973-11-23 1973-11-23 Spray nozzle for low pressure spray and uniform spray pattern

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US3858812A true US3858812A (en) 1975-01-07

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US (1) US3858812A (en)
JP (1) JPS5650623B2 (en)
CA (1) CA1014192A (en)
DE (1) DE2455738C3 (en)
DK (1) DK140686B (en)
FR (1) FR2252134B1 (en)
GB (1) GB1486437A (en)
IT (1) IT1023347B (en)
SE (1) SE407161B (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000134A1 (en) * 1981-07-10 1983-01-20 Minnesota Mining & Mfg Aerosol fan sprayhead
US4372399A (en) * 1982-03-11 1983-02-08 Development Oil Tool Systems Drill bit with wedge shaped eduction jets
WO1985002132A1 (en) * 1983-11-07 1985-05-23 Spraying Systems Co. Nozzle for atomized fan-shaped spray
US4618101A (en) * 1983-11-25 1986-10-21 Piggott Richard G Spray nozzle
EP0236142A2 (en) * 1986-03-06 1987-09-09 Sprayer Calibrator Corporation Sprayer and nozzle calibrator
US4905911A (en) * 1987-01-19 1990-03-06 Shimon Kabushiki Kaisha Fan-spray nozzle
DE3914551C1 (en) * 1989-05-03 1990-11-15 Lechler Gmbh & Co Kg, 7012 Fellbach, De
US4982896A (en) * 1988-10-17 1991-01-08 Lee Crow Spray wand
US5017409A (en) * 1988-06-13 1991-05-21 Union Carbide Chemicals And Plastics Technology Corporation Method of conformal coating
US5109823A (en) * 1990-02-23 1992-05-05 Hitachi, Ltd. Fuel injector device and method of producing the same
US5127156A (en) * 1989-09-25 1992-07-07 Hitachi, Ltd. Method for concentrically assembling a pair of cylindrical members and method for assembling a nozzle in a fuel injector
DE4213226A1 (en) * 1992-04-23 1993-11-04 Lechler Gmbh & Co Kg Flat jet nozzle, esp. high pressure jet nozzle - has shaped recesses in wall of pocket bore, to generate part jets directed towards each other
US5266349A (en) * 1991-02-25 1993-11-30 Specialty Coating Systems Inc. Method of discrete conformal coating
US5359876A (en) * 1991-11-19 1994-11-01 Robert Bosch Gmbh Method for producing a nozzle holder of an electromagnetically actuated injection valve
US5669971A (en) * 1994-04-06 1997-09-23 Specialty Coating Systems, Inc. Selective coating apparatus
US5707010A (en) * 1995-09-29 1998-01-13 Spraying Systems Co. Controllable spray nozzle assembly
WO2000067916A1 (en) * 1999-05-10 2000-11-16 Nordson Corporation Method and apparatus for dispensing liquid material
US20100329903A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20100326069A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110115223A1 (en) * 2009-06-29 2011-05-19 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110233934A1 (en) * 2010-03-24 2011-09-29 Lightsail Energy Inc. Storage of compressed air in wind turbine support structure
EP2476874A1 (en) * 2011-01-13 2012-07-18 Delphi Technologies Holding S.à.r.l. Injection Device for Reagent
WO2015039078A1 (en) * 2013-09-16 2015-03-19 Graco Minnesota Inc. Spray tip and method of manufacture
WO2016172105A1 (en) 2015-04-20 2016-10-27 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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JPS6143555Y2 (en) * 1977-02-04 1986-12-09
DE3414880A1 (en) * 1984-04-19 1985-10-24 Lechler Gmbh & Co Kg FLAT JET SPRAY NOZZLE, ESPECIALLY FOR SPRAYING PLANT PROTECTION PRODUCTS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683626A (en) * 1949-07-14 1954-07-13 Spraying Systems Co Spray nozzle and duplex assembly thereof and method of making a nozzle orifice
US2701412A (en) * 1952-06-14 1955-02-08 Spraying Systems Co Method of making spray nozzle orifice with plural tapered ends
US3045932A (en) * 1959-06-22 1962-07-24 William F Steinen Spray nozzle
US3754710A (en) * 1971-08-07 1973-08-28 Inouye Shokai & Co Ltd K K Nozzle tip of a spray gun of the airless type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683626A (en) * 1949-07-14 1954-07-13 Spraying Systems Co Spray nozzle and duplex assembly thereof and method of making a nozzle orifice
US2701412A (en) * 1952-06-14 1955-02-08 Spraying Systems Co Method of making spray nozzle orifice with plural tapered ends
US3045932A (en) * 1959-06-22 1962-07-24 William F Steinen Spray nozzle
US3754710A (en) * 1971-08-07 1973-08-28 Inouye Shokai & Co Ltd K K Nozzle tip of a spray gun of the airless type

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000134A1 (en) * 1981-07-10 1983-01-20 Minnesota Mining & Mfg Aerosol fan sprayhead
US4372399A (en) * 1982-03-11 1983-02-08 Development Oil Tool Systems Drill bit with wedge shaped eduction jets
WO1985002132A1 (en) * 1983-11-07 1985-05-23 Spraying Systems Co. Nozzle for atomized fan-shaped spray
JPS61500597A (en) * 1983-11-07 1986-04-03 スプレイイング　システムズ　カンパニ− Improved nozzle device
US4591099A (en) * 1983-11-07 1986-05-27 Spraying Systems Co. Nozzle to provide fan-shaped spray pattern
AU572922B2 (en) * 1983-11-07 1988-05-19 Spraying Systems Co. Nozzle for atomized fan-shaped spray
JPH0464747B2 (en) * 1983-11-07 1992-10-15 Spraying Systems Co
US4618101A (en) * 1983-11-25 1986-10-21 Piggott Richard G Spray nozzle
EP0236142A2 (en) * 1986-03-06 1987-09-09 Sprayer Calibrator Corporation Sprayer and nozzle calibrator
EP0236142A3 (en) * 1986-03-06 1988-07-20 Sprayer Calibrator Corporation Sprayer and nozzle calibrator
US4905911A (en) * 1987-01-19 1990-03-06 Shimon Kabushiki Kaisha Fan-spray nozzle
US5017409A (en) * 1988-06-13 1991-05-21 Union Carbide Chemicals And Plastics Technology Corporation Method of conformal coating
US4982896A (en) * 1988-10-17 1991-01-08 Lee Crow Spray wand
US5133502A (en) * 1989-05-03 1992-07-28 Lechler Gmbh & Co. Flat-jet nozzle to atomize liquids into comparatively coarse drops
DE3914551C1 (en) * 1989-05-03 1990-11-15 Lechler Gmbh & Co Kg, 7012 Fellbach, De
US5127156A (en) * 1989-09-25 1992-07-07 Hitachi, Ltd. Method for concentrically assembling a pair of cylindrical members and method for assembling a nozzle in a fuel injector
US5109823A (en) * 1990-02-23 1992-05-05 Hitachi, Ltd. Fuel injector device and method of producing the same
US5266349A (en) * 1991-02-25 1993-11-30 Specialty Coating Systems Inc. Method of discrete conformal coating
US5359876A (en) * 1991-11-19 1994-11-01 Robert Bosch Gmbh Method for producing a nozzle holder of an electromagnetically actuated injection valve
DE4213226A1 (en) * 1992-04-23 1993-11-04 Lechler Gmbh & Co Kg Flat jet nozzle, esp. high pressure jet nozzle - has shaped recesses in wall of pocket bore, to generate part jets directed towards each other
US5669971A (en) * 1994-04-06 1997-09-23 Specialty Coating Systems, Inc. Selective coating apparatus
US5707010A (en) * 1995-09-29 1998-01-13 Spraying Systems Co. Controllable spray nozzle assembly
WO2000067916A1 (en) * 1999-05-10 2000-11-16 Nordson Corporation Method and apparatus for dispensing liquid material
US6261367B1 (en) 1999-05-10 2001-07-17 Nordson Corporation Method and apparatus for dispensing liquid material
US20110030359A1 (en) * 2009-06-29 2011-02-10 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8065874B2 (en) 2009-06-29 2011-11-29 Lightsale Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20100326064A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20100326066A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
WO2011008500A2 (en) 2009-06-29 2011-01-20 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110023488A1 (en) * 2009-06-29 2011-02-03 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110023977A1 (en) * 2009-06-29 2011-02-03 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110030552A1 (en) * 2009-06-29 2011-02-10 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20100329903A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110115223A1 (en) * 2009-06-29 2011-05-19 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8240142B2 (en) 2009-06-29 2012-08-14 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8037677B2 (en) 2009-06-29 2011-10-18 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8061132B2 (en) 2009-06-29 2011-11-22 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8353156B2 (en) 2009-06-29 2013-01-15 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8087241B2 (en) 2009-06-29 2012-01-03 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8146354B2 (en) 2009-06-29 2012-04-03 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8191360B2 (en) 2009-06-29 2012-06-05 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8191361B2 (en) 2009-06-29 2012-06-05 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8196395B2 (en) 2009-06-29 2012-06-12 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8201402B2 (en) 2009-06-29 2012-06-19 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8215105B2 (en) 2009-06-29 2012-07-10 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20100326069A1 (en) * 2009-06-29 2010-12-30 Lightsail Energy Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US8436489B2 (en) 2009-06-29 2013-05-07 Lightsail Energy, Inc. Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange
US20110233934A1 (en) * 2010-03-24 2011-09-29 Lightsail Energy Inc. Storage of compressed air in wind turbine support structure
US8247915B2 (en) 2010-03-24 2012-08-21 Lightsail Energy, Inc. Energy storage system utilizing compressed gas
EP2476874A1 (en) * 2011-01-13 2012-07-18 Delphi Technologies Holding S.à.r.l. Injection Device for Reagent
US9310010B2 (en) 2011-01-13 2016-04-12 Delphi International Operations Luxembourg S.A.R.L. Injection device for reagent
CN103282613A (en) * 2011-01-13 2013-09-04 德尔福技术控股有限公司 Injection device for reagent
WO2012095450A1 (en) * 2011-01-13 2012-07-19 Delphi Technologies Holding S.À.R.L. Injection device for reagent
CN103282613B (en) * 2011-01-13 2015-09-16 德尔福国际运营卢森堡有限公司 For the injection device of reagent
CN110237955A (en) * 2013-09-16 2019-09-17 固瑞克明尼苏达有限公司 Spary tip and manufacturing method
CN105531033A (en) * 2013-09-16 2016-04-27 格瑞克明尼苏达有限公司 Spray tip and method of manufacture
US9675982B2 (en) 2013-09-16 2017-06-13 Graco Minnesota Inc. Spray tip and method of manufacture
CN105531033B (en) * 2013-09-16 2019-06-28 固瑞克明尼苏达有限公司 Spary tip and manufacturing method
WO2015039078A1 (en) * 2013-09-16 2015-03-19 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
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
WO2016172105A1 (en) 2015-04-20 2016-10-27 Wagner Spray Tech Corporation Low pressure spray tip configurations
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

Also Published As

Publication number Publication date
FR2252134A1 (en) 1975-06-20
SE7414646L (en) 1975-05-26
CA1014192A (en) 1977-07-19
SE407161B (en) 1979-03-19
JPS5650623B2 (en) 1981-11-30
DK140686C (en) 1980-03-24
DK607074A (en) 1975-07-21
AU7563874A (en) 1976-05-27
DK140686B (en) 1979-10-29
DE2455738C3 (en) 1978-04-27
FR2252134B1 (en) 1982-04-23
IT1023347B (en) 1978-05-10
DE2455738A1 (en) 1975-10-09
GB1486437A (en) 1977-09-21
JPS5089910A (en) 1975-07-18
DE2455738B2 (en) 1977-07-28

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