US2545488A - Spraying device - Google Patents

Description

March 20, 1951 E. o. NoRRls 2,545,488

SPRAYING DEVICE Filed Jan. 30, i946 3 Sheets-Sheet 1 EDWARD O. NO/R/S I BY ,1

ATTORNEY March 20, 1951 E, o, NORRls 2,545,488

SPRAYING DEVICE Filed Jan, 50, 1946 5 Sheets-Sheet 2 /NVEN7R EDWARD O. MORE/5 A TTORNE Y March 20, 1951 E. o. NoRRls SPRAYING DEVICE 3 Sheets-Sheet 5 Filed Jan. 50,

/NVEN7/Q EDWARD O. NCR/:EIS

ATTO/fP/VEY Patented Mar. 20, 1.951y

UNITED STATES ITENT OFFICE This invention relates generally to spraying apparatus of the centrifugal type wherein.` liquid is fed by suitable means to an atom-iaing distributor rotating at high speed; which receives, atomizes, and projects the liquid in a finely divided spray, througha suitable opening in the apparatus, against the surface to be sprayed.

-More specifically', the invention relates to. a portable centrifugal spraying apparatus of the so-called all-position type which is capabli-io o-f being' operated at any angle.

The apparatus disclosed in this application is ay modifica-tion of the apparatus shown and described in my co-pending application Serial No. 641,929, filed January 18, 1946. This application is directed tothespecific construction of the atomizing distributor, the general object of the invention being to provide. a spraying device which is simple' compact, light and eih'cient inY operation and which is especially adapted. forv use by relatively unskilled operators.

Another object of the invention is to provide;

in a device ofV this character an improved atomizing distributor which is of relatively simple construction and is efficient in operation-L Other andi more limited objects of the inven- I tion will be apparent. from the following. speci*- cation and the accompanying drawings forming a part thereof. wherein:

Fig. 1` is a partial central longitudinal vertical section through a centrifugal spraying device constructed accordingY to m-y' invention;

Fig. 2 is a partial horizontal section taken on: the line 2 2 of Fig. 1;

' Fig.'3 is a partial transverse section taken onv the line 3-3 of Fig. 1;

Fig. 4 is a transverse section taken on the line' IIL- ll` of Fig. 1;

Fig. 5l is an enlarged partial? central'` vertical section through the atomizing distributor; and Fig. 6 is al View` similar to Fig. 5 showing. a. modified form of distributor;

My improvedv spraying apparatus comprises generally a rotating open ended ccllectingcase; into which the liquid to be sprayedis forced under pressure, and a rotating atomizing distributor Within the case which picks upY the liquid,- atomizes it and'sprays it out through the open end of the case. The collecting case and distributor are suitably supported by aA housing` within which is vmounted a high speed motor and suitable gearing by which the collecting Case and distributor are rotated. A handle by which the deviceis held 'whenused secured to the housing.

provided for controlling the admission of liquid to the apparatus, and for znoying the-distributor between operative and inoperative positions.

Referring to thev drawings more in detail,- the numeral I indicates a motor housing in whichfa'.y

small high speed series. type. motor, having an.

armature shaft 2., is'suitably mounted. The rear' end of the housing I' is. closedl by aremovablef 7cover 3, which when removed affords. access to the motor and facilitates the: insertion and rei-` nioval thereof.

Av handlel e by which the' device is. held*` and. manipulated when in operation, is rigidly securedv to the under side of the housing I`.

A gear casing 5 is secured to the forward and^ of the motor housing I: by bolts 6;( Securedr to,

and projecting forwardly from the face of theI gearcasing 5' isA a tubular bearing stud 'l which* i ris disposed in axial alignment with the.` armal ture shaft 2f. A sleeve; 8 having a spur gear 9' secured to the rear end thereof' and a radially' extending concentric circular ring. I0 secured? to:v

the forward end thereof' is rotatablymounted on the stud 'I' andis retained thereon by ar nut- II on the forward end of the stud 'I'.

The gear 9 meshes with a small pinion' I2 formed on the projecting end ofA a shaftr I3 whichA isrotatably supported' by the gear casing and the fronti Wall It ofl thefmotor housing I. Se.'-y

cured to the shaft I3 Iwithin the gear casing: 5ir The gear I5 meshes withI a# is a spur gear I5. smaller gear I6 rotatably mounted upon a short shaft I-lwhich is alsosupportedby the gear casa` ing 5, encloses the gear 9i pinion I`2 and tl'a'e' sleeve 8.

A collecting case 2i) is 'removably secured `to the ring IU in any suitable'manner. As'shown herein the rear. end of the collecting casel 20' isfpermanently secured to a ring 2|v which i's'v threaded onto a forwardly extending annular flange 22 formed on the ring I'O; The collecting" case 2li, which is circular in' cross section,v flares'- outwardly as indicated at 23, gradually increas-V ing in diameter as it extends forwardly froml the ring l until it merges' With a torio-Shaped trough 2li. The portion 25 of the collecting` cas'efv Finger operated means are. alsov 20, forwardly of the trough 24 gradually decreases in diameter and terminates in a circular opening 26 at the forward end of the case.

A frusto-conical ring 21 is concentrically mounted within the section 25 of the collecting case 2U, with its small end projecting through the opening 26 slightly beyond the forward end of the case. A cut-o flange comprising a conical ring 28 similar to, but smaller than, the ring 21 is concentrically mounted within the ring 21 so as to provide an annular space 29 between the inner wall of the ring 21 and the outer wall of the ring 23. As shown in Fig. l, the plane of the forward edge 30 of the ring 28 is slightly to the rear of the plane of the forward edge 3| of the ring 21. Both the rings 21 and 28 are Supported by a plurality of lugs 32 which are 'secured to and project inwardly from the inner wall of the -portion 25 of the collecting case. A frusto-conical splash guard or ring 33 is secured to the inner surface of the ring 28, with its large end in contact with the inner surface of the ring 23 and its small end projecting rearwardly within the case 20. The forward edge of the splash guard 33 has a plurality of spaced notches 34 formed therein so as to provide a plurality of uninterrupted paths along the inner surface of the ring 28 between the forward and rearward edges thereof. A ringshaped open mesh screen 35 is also supported by the lugs 32 between the inner wall of the case 20 and the splash guard 33.

The atomizing distributor generally indicated by the numeral 36 is rotatably supported within the collecting case 26 by a hollow supporting tube 31. The axis of the distributor is offset with respect to the axis of the collecting case 20, and is substantially perpendicular to a horizontal plane through the axis of the collecting case, as viewed in Fig. 1. rIhe intake end of the distributor 36, when not spraying, is in close proximity to the annular trough 24 as shown in full lines in Figs. 1 and 3. When spraying the distributor is in the position shown in dotted lines in Figs. 1 and 3, with its open end dipping into the liquid in the trough 24 and facing toward the peripherally advancing liquid to constitute a rotating scoop.

Suitable'mechanism which is provided for supporting and rotating the distributor 36 and for moving it back and forth between operative and inoperative positions will now be described in connection with the construction and operation of the distributor. y

The rear end of the Supporting tube 31 is rigidly secured to an oscillating member 38, pivotally supported as indicated at 39, within the bearing stud 1. The tube 31 extends forwardly from the member 38 into the collecting case 20 for a short distance in axial alignment with the armature shaft 2, and then it curves upwardly of and to one side of the axis and then downwardly as shown in Figs. 1 and 2. The forward downwardly turned end of the tube 31 has rigidly secured thereto a hollow bearing stud 40 upon which the atomizing distributor 36 is rotatably mounted.

The distributor 36 comprises an elongated frusto-conical feed sleeve 4l and a plurality 0f slightly dished rings 42 which surround the upper discharge end of the feed sleeve 4I. The angle between the wall of the sleeve 4l and the axis thereof is preferably between 12 and 15. The sleeve 4I is secured to an elongated axially disposed cylindrical hub 43, by spiders 44, which is rotatably mounted upon the reduced end 45 of the bearing stud 40. The hub 43 has a closed end 46 with a squared aperture therethrough. A short shaft 41. which is rotatably supported within a bore 4a m the houow stud 4u, has a reduced squared end 49 which extends into the aperture in the end 46 of the hub 43. A screw 5U and a washer 5l hold the hub 43 and the shaft 41 in driving engagement.

The rings 42 are secured one below the other in spaced relation, to a disc 52 by a plurality of pins 53 and spacers 54. The disc 52 is secured to a hub 55 which is rotatably supported on the upper end 56 of the stud 40, between an annular shoulder 51 and a removable retaining ri-ng 58. The axis of the hub 43 and sleeve 4l is disposed at an angle of approximately 15 to the axis of the hub 55 and the rings 42, which positions the upper edge 59 of the sleeve 4l entirely within the rings 42 and in a plane at an angle thereto. The vertical distance between the lowest point in the edge 59 and the highest point therein is substantially equal to the vertical distance between the uppermost and lowermost rings 42.

The hub 43 of the feed sleeve 4| is connected to the hub 55 of the disc 52, to which the rings 42 are secured, by a coiled spring 60. The shaft 41 is connected to and driven by the armature shaft 2 through a flexible shaft 6I within the tube 31 and the hollow stud 40. The hub 43 and the feed sleeve 4l secured thereto are rotated by the shaft 41, and the disc 52 and the rings 42 carried thereby are rotated in unison with the sleeve 4l by the hub 43 thereof through the coiled spring 6U.

The construction of the distributor 36 is such that in operation it will throw out or spray a band of finely atomized liquid around the entire vperiphery of the rings 42. The spray leaves the rings 42 tangentially, and the thickness of the band of spray is substantially equal to the distance between the uppermost and lowermost rings 42 as indicated in Fig. 1. Part of the spray will be projected out through the opening 26 in a segment which gradually increases in width after leaving the ring 26, as indicated in Fig. 2. The balance of the band of spray is intercepted by the inner wall of the case 20 by which it is collected. and returned to the distributor for respraying. To secure the most efficient results the band of spray leaving the cut-off ange 2B should be substantially symmetrical about the extended axis of the collecting case 23. The position of the axis of the distributor is determined by the diameter of the atomizing rings 42. The periphery of the rings 42 should be tangent to a plane through the axis of the distributor, and the length of the sleeve 4I should be such that the smaller intake end thereof will dip into the trough 24 during operation, and the rings 42 will be in a position to project a band of spray out through the cut-off flange 28 as described.

In Fig. 6 I have shown a slightly modied form of distributor. In this form the outside diameters of the rings 42a are the same, but thev inside diameters thereof vary as shown. Otherwise the construction of the distributor shown in Fig. 6 is the same as that shown in Fig. 5 and the same reference characters are applied thereto. In this form the distance between the edge of the sleeve and the inner periphery of the rings varies in a manner to obtain a uniform distribu.

tion of liquid to the distributor rings.

The tube 31 has a anged collar 62 rigidly secured thereto within the case 20. A ring 63 having a peripheral groove 64 is rotatably mounted upon the collar 62. The ring l0, to which the case 20 is secured, has a forwardly projecting annular flange 65, having a peripheral groove 66, formed integrally therewith. `One end of a' spring' clainp-1 689 which" cooperates with=- the groove B4, and the other end`v thereofi is secured tothe 'a-nge' byl a spring clamp.` 69 which cooperates with the' grooves 66. tions as a seal betweenA the: case 20 andi thel interior of the bearingstud 1` to prevent. any liquid'y carriedV thereby .to the inoperative: position shown. iii-.fulllines in.Figs.-1v and 8f.. 'Ihe-rod14 projects out. through the front wall of the gear casing. 5 into engagement with a trigger 11 pivoted at 18 to a lug on the gear casing. The trigger 11,.

which-- is somewhatA flexible below the point of engagement with the rod 14, extends downward- 1y into alignment` with and a short distance beyond the upper forwardly extending. curved end 19 of a lever 80 which is operable. to control the opening and closingl of a valve 8|.

The valve 8| controlsl the admission of liquid to the' collecting case 20. The liquid is forced, usually byair pressure, from asuitable container through. a1 flexiblev hose 82 to the valve 8|. After passing the valve 8|. the liquid flows through an upwardly andan. outwardly extending conduit 83. in the handle 4, and thence throughr a tube 881,` the end' 85 of which is turned back upon itself .andr extends into the collecting case 20 through the open forward end. 216'- adjacent the outer surface of the ring 21.

The lever 80, which is positioned in a slot 86 in the handle 4 in such a manner that the operators hand will n'ot engage it when he grips the handle 4, is pivoted at its lower end to a lug 81 on the casing of the valve 8|. A set screw 88 which extends through a tapped hole in the lever =80 in alignment with the valve stem 89, constitutes an adjustable abutment by which the valve is opened and closed as the lever 80 is rocked on its pivot.

In operation the operator holds the device by the handle 4 with his forel-Inger around the trigger 11. The motor is energized, by means of a suitable switch not shown to drive the collecting case 20 at a speed of 400 to 600 revolutions per minute and the distributor at a speed of about 12,000 revolutions per minute. The direction of rotation of the collecting casing 20 and the distributor 36 is indicated by arrows in Fig. 3. The trigger 11 is then pulled toward the curved end 19 of the lever 80 to shift the distributor 36 from the inoperative position, shown in full lines in Figs. 1 and 3, to the operative position, shown in dotted lines in Figs. 1 and 3. In the operative position the intake end of the sleeve 4| of the distributor projects into the trough 24 as is clearly shown by the dotted lines in Fig. 3. Further pressure on the exible end of the trigger 11 will bring it into engagement with the forwardly extending curved end 19 of the lever 80 to rock the lever 80 on its pivot and open the valve 8|. This will permit liquid to be forced under pressure from the storage receptacle through the exible conduit 82, conduit 83 and tube 84 into the collecting case 20. Due to the particular shape of the case 20 and to the cen- Theboot. |51 func-- trifugali action: caused by' the: rotation of the; casey the liquid will flowI into the trough.` 24; Thel liquid will be carried around in-r the troughu as.v it rotates. and will be: forced: by its momentum.y into andiV scooped up by the. intake end ofv the.

sleeve 4| of the distributor. The rotation and shape of the distributor sleeve'and. the momentum ofi the liquid willV cause. the liquid to flow up the inner surface. of the sleeve 4| to the upper edge 59 thereofwherev it. will be thrown radially outwardly by centrifugal. force, onto. the rings 42. The rings 42,. due to their high. speed of rotation,Y will throw or spray the liquid outwardlytangentially thereof in a. nely divided atomized spray as previously described. As previously stated,. part of this spray will be projected through thev open end 26 ofthe case-20.4 TheV balance of the. spray will be caught by the inner wall of the case and will be returned lto the trough 24 for re-spraying. Part of the spray will strike the inner rearwardly flaring. wall of the. ring 28. Any' liquid reaching` the forward edge 30 of the ring 28 will be thrown radially outwardly therefrom against theY inner wall of the ring '2d and returned tothe case 20. The balance of the liquid striking the wall of thev ring 28 will be: returned thereby through the notches 34. in the splash guard 33 and into theV casev 20..

It is to be understood that this apparatus is, adapted for paint'spraying and also for atomizing. and spraying other liquids,y such as a liquid disinfectant, and that the distributor sleeve may be fed by other. means than by the. rotary case as shown.

From the-foregoing it will be apparent to those skilled in this art that I have provided a simple and eicient mechanism for carrying out the` objects of my invention. It is to be understood that my invention is not limited to the specific construction shown and described herein as various modifications can be made'therein within the scope of the appended claims.

What is claimed is:

l. In a spraying apparatus the combination of a rotary case adapted to maintain a film of sprayforming material about the inner peripheral wall thereof, an axially disposed opening in one end of said case, means for supplying said material to said case, a distributor operative to receive said material from said case and spray a band of said material out through said opening, said distributor comprising a tube pivotally mounted adjacent one end thereof exteriorly of said casing and projecting into said casing, a supporting member secured to the end of said tube within said casing, a hub rotatably mounted upon said supporting member, a shaft rotatably mounted within said supporting member, means for driving said shaft, a driving connection between said hub and said shaft, a frusto-conical feed sleeve having intake and discharge ends rigidly secured to said hub., spraying means encircling the discharge end of said sleeve rotatably mounted on said supporting member with the axis thereof at an angle to the axis of said hub and said feed sleeve, a driving connection between said hub and said spraying means, and means for controlling the admission of said material to said feed sleeve.

2. In an apparatus for spraying spray-forming material, a distributor comprising a rotatable frusto-conical feed sleeve for said material having intake and discharge ends, and rotary spraying means of substantially axial width encircling the discharge end of said feed sleeve with the n i axis of said spraying means disposed at an angle to the axis of said feed sleeve such that the discharge end of said sleeve sweeps across the entire axial width of said spraying means during rotation so as to distribute said material across said band.

3. In an apparatus for spraying spray-forming material, a distributor comprising a rotatable stack of spaced spraying rings disposed in axial alignment, a rotatable feed sleeve having a discharge end operable to deliver spray-forming material to said spraying rings and mounted on an axis disposed at an angle to the axis of said spraying rings with said discharge end inclined across said stack of spraying rings with the highest point of said discharge end registering with the uppermost spraying ring and with the lowest point thereof registering with the lowermost spraying ring to feed said material uniformly to said stack.

4. A distributor as set forth in claim 3 having a universal driving connection between said sleeve and said rings for driving the sleeve and rings at the saine speed.

5. A distributor as set forth in claim 4 in which said universal connection comprises a spring interconnecting said sleeve and said rings.

6. A distributor as set forth in claim 3 in which the rings are of different inside diameters and are differently spaced from said feed sleeve in a 1 manner to obtain a uniform feed of said material across said stack of rings.

'7. A distributor as set forth in claim 6 in which the rings of smaller inside diameter are located centrally of the stack and the rings are of progressively larger diameters toward the top and bottom of the stack.

8. In an apparatus for spraying spray-forming material, a distributor comprising a rotatable disc, a stack of spaced spraying rings disposed in axial alignment secured to said disc, a rotatable frusto-conical feed sleeve for said material haw; ing intake and discharge ends mounted with the axis thereof disposed at an angle to the axis of.4

said disc adapted to cause the discharge end thereof to sweep across said stack of spraying rings during rotation and disposed to feed the said material uniformly to said rings.

9. In a spraying apparatus, a distributor com-l prising a hollow bearing stud, a hub rotatably mounted upon said stud, a shaft rotatably mounted within said hollow stud, means for driv ing said shaft, a driving connection between said.

hub and said shaft, a frusto-conical feed sleeve having intake and discharge ends rigidly securedv to said hub, spraying means of a substantially axial width encircling the discharge end of saidv sleeve rotatably mounted on said stud with the axis thereof at an angle to the axis of said hub such that the discharge end of said sleeve sweeps lacross the entire axial width of said spraying means during rotation, and a universal driving connection between said hub and said spraying means.

EDWARD O. NORRIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number' Name Date 888,091 Kestner May 19, 1908 1,506,226 Dick Aug. 26, 1924 1,606,142 Burrell Nov. 9, 1926l 1,667,745 Smellie May 1, 1928 1,697,254 Webster Jan. 1, .1929 1,779,336 Riley Oct. 21, 19301 1,846,716 Goehler et al Feb. 23, 1932v 2,063,048 Norris Dec. 8, 1936 2,099,988 Norris Nov. 23, 1937

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