US2518522A - Powder sprayer - Google Patents

Description

Aug. l5, 19.50 .i J. w; CIMBRA ErAL POWDER SPRAYER 2 'sheets-sheet 1`- l Filed July s1. 1944 Inventors unloura amd Joseph MLC' 'be C. `Ives Allg- 15 A195.0 J. w. clMluRA Er AL POWDER SPRAYER 2 Sheets-Sheet 2 Filed July 31, 1944 l Inventar-s Joseph M Cmbura and )Eben C. Ives ttonegs Patented Aug. l5,P 1950 f v POWDER sPRAYER Joseph W. Cimbura, Newport, and Eben C. Ives, St. Paul, Minn., assignors to Mueller Can and Tube Co., St. Paul, Minn., a corporation of Minnesota Application July 31, 1944, Serial No. 547,500 s claims. (c1. 22e-.193)

Our invention relates to powder sprayers and has vforan object to provide a powder sprayer which willv be effective to spray powder regardlessof the position in which the device isheld.

Another object of the invention resides in pro` viding in one form of the `invention a powder sprayer having a case and a removable receptacle or cartridge within the same and in which the powder is contained and which may be easily mounted in the sprayer.

A feature of the invention resides in providing a receptacle for the powder in whichvthe powder may be sold and which may be used in the spraye without material alteration or change. i Y

Ann object of the invention resides in providing a powder sprayer in which the receptacle virtually floats within the case.

An object of the invention resides in providing a powder sprayer in which an annular air passageway is provided within the case extending about the exterior of the powder receptacle.

A` still further object of the invention resides in constructing said receptacle with laterally extending outlet openings communicating with said annular passageways at the ends ofthe receptacle.

A feature of the invention resides in providing air pumping means at one end of said passageway and discharge means at the other end of said passageway.

An object .of the invention resides in providing means for restricting the flow of air entering said air passageway to cause the same to expand upon entering'the passageway and to cause suction in said receptacle through` the outlet openings at the inlet end of the annular passageway.

A still further object of the invention resides in providing an expansion chamber at the outlet end of the annular passageway and into which the air leaving the annular passageway is directed, whereby suction is caused in' the receptacle through the lateral openings at the outlet end of said annular passageway.

Another object of the invention resides 'in providing a construction whereby the receptacle within the interior of the device in'one form ofV the invention may be readily lled with powder after the device has been fabricated.

Other objects of the invention reside inthe novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings:

Fig. 1 is an end view of a powder sprayer illustrating an embodiment of our' invention.

Fig. 2 is a longitudinal sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a View similar to Fig. 1 with the powder sprayer inverted and the parts in partly extended position.

Fig. 4 is a cross-sectional View taken on line 4-4 of Fig. 2.

Fig. 5 is a cross-sectional view taken on line 5-5 of Fig. 2.

Fig. 6 is a cross-sectional view taken on line 5 5 of Fig. 2.

Fig. '7 is a cross-sectional View taken on line I-l of Fig. 2.

Fig. 8 is a plan View similar to Fig. 1 of ane other form of the invention.

Fig. 9 is an elevational sectional view taken on line 9 9 of Fig. 8.

Fig. l0 is a perspective view of the container or cartridge removed from the case.

Fig. 11 is a cross-sectional view taken on line I l-l I of Fig. 9.

Fig. 12 is another cross-sectional View taken online |2|2 of Fig. 9.

In the use of powder sprayers in which the air is conducted from one end of the sprayer to the other, considerable difficulty is encountered where a small air passageway is provided. Such,

passageway usually appreciably reduces the capacity of the device and when constructed of small dimensions conducts too little air and frequently becomes clogged. The instant invention provides a device in which clogging is prevented and in which a suicient volume of air can be conducted through the passageway.

The form of our invention shown in Figs. 1 to 7 comprises a receptacle or cartridge indicated in its entirety by the reference numeral l@ and which is disposed within a case or container il.

Associated with this container is a pumping cyl-` inder l2, by means of which air is forced into the device to create suction therein and draw powder into the air stream for discharge through the discharge outlet of the container. These various parts will now be described in detail.-

The container Il consists of a sleeve I3 of tubular material, such as paper which has a closure I4 at its lower end and a closure l5 at its upper end. The Vclosure I4 is preferably constructed of metal and is formed with a flange it which is crimped'to the lower end of the sleeve i3 and which lies substantially within the connes of the outer surface of said sleeve, so as to provide a fl-ush constructed for coaction with the pumping means, as will be presently morefully described. This lclosure. as shown in Fig. 6, has

3 a central opening il in the same which is covered with a sheet of fabric i9. This fabric is impervious to the powder within the container i5 but will allow air to pass readily through the same.

The other closure I5 for the opposite end of the container II consists of a tubular member 59 which encircles the sleeve I3 and fits tightly about the same. This tubular member has secured to the end of it a metal ring I9 which is constructed with a Ilange 2I crimped to the outer end of said tubular member. The closure I5 is applied to the end of the sleeve I3 and when in position, closes the upper end of the container I I.

The ring I9 has an opening 22 in the same sur- 5' .rounded by a lip and through which access may be had to the interior of the device. The opening 22 is adapted to be closed by a cap 23 which has an end wall 3l and a flange 39 issuing outwardly therefrom. The ange engages the lip 20 of ring I9 and forms a fluid-tight connection therewith. The tubular member 59 in the assembly of the parts is glued or otherwise secured to the sleeve I3, so that the same becomes permanently attached thereto.

The receptacle Il) consists of a tubular body portion 24 open at its upper yand lower ends. This body portion is of slightly smaller dimensions than the internal diameter of the sleeve I3, so as to form therebetween an annular passageway 25 extending throughout the length of the re ceptacle IU. The receptacle I0 further includes two end members 25 and 21 which overlie the ends of the tubular body portion 24. These end members are detached from the vbody portion 24 and the ends of said body portion are constructed so that laterally extending openings 28 are formed between the end member 26 and the tubular body portion 24 and similar openings 29 between the other end of the tubular body portion 24 and the end member 21. These openings communicate with the ends of the passageway 25.

The end member 26 of receptacle I9 is spaced from the ring I9 of closure I5 to provide a chamber 32 at the upper end of the device. The end member 2l is similarly spaced from closure I4 of the container II to provide a pressure chamber 33 at the opposite end of the device. The end'member 23 lits snugly within the interior of the sleeve I3, excepting at certain portions about the periphery thereof where the same is formed with circumferentially extending openings 64. These openings bring the passageway 25 into communication with the chamber 32. The end member 21 is similarly constructed and lits snugly within the sleeve I3 excepting where the same is formed at its periphery with openings bringing the air chamber 33 into communica tion with the other end or the annular passage-l way.

The end Wall 3l of cap 23 has a discharge operi` ing 34 in the center oi the same which communicates with -a radial passageway 35 lying between the end wall 3I of cap 23 and the end member 25 of receptacle IIl. This passageway communi- Cates with the chamber 32 and conducts the air from the annular passageway 25 to the discharge opening 34. To maintain the said passageway 33 open at all times, the lend wall 3l of cap 23 is constructed with a number of bosses 3'! which are pressed inwardly therefrom and which hold the adjoining parts in spaced relation.

The pumping cylinder I2 consists of a tubular member 4I constructed of paper which has va closure 42 secured to the outer end. thE rQQ@ This.

closure is preferably formed of metal and has a ange 43 crimped about the outer end of the said tubular member 4I. The tubular member 4I and the closure 42 constitute a cylinder which, acting in conjunction with the container II which serves as a piston, provides a pressure chamber in which air may be compressed when the said cylinder is moved toward the closure I4 of the container I I. The closure 42 has an air inlet 44 which is adapted to communicate with the chamber 40. Overlying the closure 42 is a valve indicated in its entirety at 45 in Fig. 7. This valve consists of a disk 46 constructed of paper or some similar material which is formed with a crescent shaped cut 4l dividing said disk into an annular portion 48 resting upon the closure 42, and a central portion 49. The said disc is further weakened along the line 5I, so that the central portion serves as a valve apper for controlling the iiow of air through the inlet 44. When the cylinder I'Z is drawn outwardly, valve. 49 opens to permit entry of air into the pressure chamber 40. Upon reversal of movement, the v-alve apper 49 closes the inlet 44 and the airis forced into the air chamber 33 through the air passageway I1 in closure I4.

For 'the purpose of lling the interior of the receptacle II) with the powder, a central openingT 53 is formed in the upper end member 25. This opening is adapted to be closed by means of a Vcover 54 which is of dimensions smaller than those of the opening 22 in ring I9 and which is insertable into the device through said opening. The bosses 31 on the cap 23 are adapted to en gage this cover and to hold the end member 26 away from the end wall 3| of cap 23, so as to maintain passageway 35 open. The cover 54 may be glued 'to the end member 26 or the same may be left loose, as desired. It will be noted that the diameter of 'the hole 53' is such that the cover 54 closes said hole, even in the event that said cover is .shifted laterally until it engages the inner surface of the sleeve I3. 'Thus,'the hole 53 is maintained closed at all times.

The tubular member 4I extends up to the tubular member I8 and the two may be temporarily held in position by means of la label, band or other readily fracturable wrapper, which extends about these parts and which may be secured thereto in the customary manner.

The method of assembling the device is as follows: The end member 2'I is first inserted into the container I.I and then the tubular body portion 24 dropped in upon the same. Thereafter, the .end member 26 is placed yupon the tubular body portion 24 and the closure I5 applied. This closure is then glued or otherwise secured to the sleeve I3 and the parts are then permanently held in position. Since hole 22 in ring I9 is of lesser diameter than the diameter of the end member 26, the Asaid end member remains within the container II and holds the yother parts in position.

In filling the receptacle Ill, the powder .is inserted through the opening .22 in closure I5 and through the hole 53 in the end member 25. The cover 54 is next placed upon 'the end member 25 and the cap 23 applied. A piece of paper or similar material is preferably glued over the discharge outlet 34, whereupon vthe powder sprayer is completed and ready to be furnished to the user.

In the use of the invention, the label or other seal connecting the tubular member 4I to the tubular member 50 is rst broken and the paper closing the discharge opening 34 either removed or perforated. To'operate the device, it is merely necessary to pump-.the cylinder I2 back and forth. This successively draws airinto the pressuresfchamber 40, compresses the air and forces the Asame into 'the air chamber 33 from which it passes through the annular passageway 25 and into the chamber 32. The air, upon entering this chamber, passes through the passageway 35 and is discharged through the discharge outlet 34. As the air` entersthe annular passageway 25, it expands and causes a suction in the powder outlets f 29 and/or 34 rwhich draws powder into thepassageway- 25 andmixes the same with air. The powder-laden air is then directed through the passageway 36 and discharged from the discharge outlet 34. vFrom the drawings, it will be seen that when the device is arranged in upright position,` as shown in Fig. 2, that powder enters the annular ypassageway 25 through the lower openings 29. When, however, the device is inverted, yas shown in Fig. 3, the powder entersthe said annular passageway through the upper openings '28. It will also be readily comprehended lthat since the passageway 25 is annular, the device may be operated regardless of the position of the same, since powder can enter the passagewayl 25 from any locality about the circumference ofthe receptacle.

While we have referred to the powder as entering the passageway 25 through suction caused by the` air passing through said passageway, it will be readily comprehended that a certain amount of powder sifts into the said passageway through the disturbance set up inthe device by the manipulation of the pumping means and also by the action of gravity. The receptacle I nts freely Within the container I I and is moved during manipulation of the device. This keeps the passageway 25 clear and also assists in discharging powder into the same.

While the discharge outlets 28 and 29have been shown in the drawings as of substantial proportions, it can readily be comprehended that these outlets can be made of proper dimensions to discharge the exact amount of powder desired. I have found in practice that with the construction of the parts of paper, the roughness ofthe parts when constructed in the ordinary manner, provides sufficient 'openings to permit the discharge of a suilicient amount of powder into the air stream.

The form of the invention shown in Figs. 9-12 is similar to that previously described. For this reason, the description of the similar parts will not be repeated, and the same reference numerals preceded by the digit 1 will be used to designate corresponding parts.

The container III is similar to the container II, excepting that the sheet of fabric covering the opening V| I'I in the closure I I4 of said container is omitted. Instead of the same, a disk of cardboard is employed which is shown in Fig. 11 and indicated by the reference numeral 6I This disk fits freely within the lowermost portion of the sleeve |I3 and ,rests on a ilange 62 extending upwardly from the closure ||4 at the margin of the opening I I'I. The edges of the disk 6| are cut away to provideopenings 63. By means of this construction, a valve is provided which permits passage of air. through the opening |I'I and into the interior of the container I I I, but which prevents the ow of air in the opposite direction.

The tubular member |50, which is similar to thebody 50 of the closure I5 in the other form of the invention, is securely attached to the* sleeve |I3. Encircling the outer edge of this tubular member and the sleeve I| 3 is a ring IIS similar to ring I9 of the other form ofthe invention. This ring has a flange |2| crimped to the outer surface of the tubular member |50 and a flange |20 crimped to the inner surface of the sleeve ||3. By means of this construction, the upper end of the container II| is open for the 10 reception of the receptacle IIO and the opening' therein is substantially the same as the internal diameter of sleeve I| 3.

The receptacle IIO differs from the receptacle* I0 in that the same is constructed with end members or caps 64 rigidly secured to the tubularbody portion |24 of the same. These caps are formed of metal and are provided with internal flanges 65 and external anges 66 which are crimped about the edges of the tube and hold the said cap securely attached thereto. The caps 64 are each constructed with a raised portion 61 at the center of the same leaving an annular depression 68 extending about the said raised portion. rIhe anges 56 are pressed into the mate- 25 rial of the tubular body portion |24, so that the receptacle II is smooth upon the exterior thereof. The caps 64 at both ends of the receptacle are identical, so that either end of the receptacle may be directed into the container in applying the same thereto.

The open end of the container or case |I is closed by means of a cap |23 which is identical with the cap 23, except that the cap |23 is of suitable dimensions to engage the Flange |20 of the ring I9. The raised portion 6l of the uppermost cap 64 of the receptacle |24 is adapted tov engage' the bosses |37 formed on the same to provide a passageway |36 from the chamber |32 to the discharge opening |34. The receptacle 40 |24 is held in proper position by a compression coil spring 69 which is received within the depression |32 of the lowermost of the caps |64 and which engages the disk 6I. This spring, in

addition to holding the receptacle in position,

mpadapted to be easily ruptured by the user when.

""the device is desired for use. If desired, the said openings may be made entirely by the user and.

instructions merely printed upon the exterior of the tubular portion i 24 of the receptacle indicatmiing where the holes or openings are to be made.

` In either event, these openings are cleared prior to the use of the device.

The pumping mechanism of this form of the invention is the same as that shown in Figs. 1-7. 6M With the form of the invention disclosed in Figs. 8-12, the powder may be placed in the receptacle I 0 at the factory and the said receptacle sold separately from the 4case and ,pump

mechanism of the invention. When desired forv 70.? use, the holes 'II are either formed or opened up `and the receptacle slid into the container ||I.

VThe receptacle may be inserted with either end entering the container, since both ends are identical in construction. The said container then= 7,53- rests upon the spring 69 which is expanded. Cap.

These openings may be formedA atV asignan lift` is next applied and when forced intoi closing position, compresses the spring l which holds the parts in operating position. It willi readily be comprehended that theA cartridges: or containers having the powder in them may be sold as rel-lers and a single case andpumping mechan-isI-n used repeatedly.

The method ofc-poration andv of use of the invention shown in Figs. 23-12vv is. the same as that shown in Figs. 1

: vThe advantagesof our invention are: manifest. The parts are easily constructed and ata nominal expense. Assembly of the. parts of the powder sprayer can bei quickly andi easily made. Since the air passageway is annular', danger of clogging is entirely prevented andV the air passageway maintained open at all times'. The receptacle for the powder virtuallyA iioats within the container of the invention and is' moved? about within the container, during use, so that any' powder which may lodge within the annularI passageway is constantly agitated and is positively ejected from the device by the air stream passing through the air passageway. The' device operates in exactly the same manner whetherone side of the device or the other is uppermost, or whether the device is held vertically, horizontally or tilted in eitherdirection. The fabric member overl-ying the opening in the lower closure of the container in the one form oi: the invention prevents the powder irc-m being discharged into the air'pressure chamber and leaving from the wrong end of the device. YIn the one form of the invention, the powder may be packed in cartons at the factory and used as rells by the user.

Changes in the specific form of our invention, as herein described, may be made within the scope of what is claimed without departing from the spirit of our invention.

I-lavingr described our invention, what we claim as new anddesire to protect by Letters Patent is:

l. In a powder sprayer, a receptacle comprising atubular body portion and end members associated therewith, a sleeve surrounding said body portion and spaced therefrom to form an annular passageway extending about said receptacle, said receptacle having transverse outlet openings arranged circumierentially about said receptacle to communicate with said annular passageway at different localities therein, spaced circumierentially from one another, a closure for one end of said sleeve spaced from the corresponding end member of said receptacle at certain portions thereof and forming an air chamber therebetween communicating with said annular passageway, closure means for the other end of said sleeve spaced from said other member at portions thereof to form a transverse passageway, said second named closure means having a discharge opening therein communicating with with saidr sleeve: for forcingair through said passageway and discharge', means ati the other end of said passagewayr 3. In a powder sprayer, a; receptacle: comprising a tubular body portion open at: its ends, end members overlyingv the ends. of said body portion anddetached from said body portion at certain localities to provider laterally extending outlet openings at the ends of said receptacle, a sleeve4 surrounding said body portion and spaced therefrom to form an annular passageway extending about said receptacle, said outlet openings discharging. laterally into. said. passageway, means at one endl of said passageway associated with said sleeve for' forcing air throughl said passageway, means for constricting the air entering the said passagewayl at thev locality oi one ofV said lateral openings to provide rapid. expansion of the air into the annular passageway and suction in said lateral opening of the receptacle and .dis-

charge means' at the other.` outlet end of said passageway.

4,. In a powder sprayer, a receptacle comprising a tubular body portion open at its ends, end members overlying the ends of said body portion and detached fromfsaid body portion at certain localities to provide laterally extending outlet openings at the ends. of said receptacle, a sleeve surrounding said body portion andspaced therefrom to form an annular passageway extending about said receptacle, said outlet opening discharging laterally into said passageway, means at one end of said passageway associated with said sleeve for forcing air through said passageway, means for constricting the air entering the said passageway at the locality of oneI of said lateral openings to provide rapid expansion of the air into the annular passageway and suction in said lateral opening of the receptacleand means forming an expansion chamber at. the other end of saidr passageway and into which the same discharges, said expansion chamber producing suction within the receptacle through the other lateral opening and discharge. means at the other end. of thersaid sleeve and communicating withsaid expansion chamber.

5. In a powder sprayer, a receptacle comprising a tubular body portion and end members at the ends of the same, said tubular body portion having laterally extending outlet openingsy therein at both ends thereof, a sleeve surrounding said bodyportion and spaced therefrom to form an annular i passageway extending about said. receptacle, said said transverse passageway 4and means at the other end of said receptacle associated with said sleeve for forcing air through said annular passageway;

2. In a powder sprayer, a receptacle comprising a tubular body portion open at its ends, end members overlying both ends of said body portion and detached from said body portion at certain localities to provide laterally extending outlet openings at both ends of said receptacle, a sleeve surrounding said body portion and spaced therefrom to form an annular passageway eX- tending about said receptacle, said outlet openings discharging laterally into said passageway, means at onerend of said passageway associated outlet openings discharging. laterally into said passageway, means at one end of said passageway for forcing air through said passageway, means for constricting the air entering the said passageway at the locality of one of said lateral openings to provide rapid expansion of the air into the annular passageway and suction in said lateral opening of the receptacle andV discharge means at the other end of said passageway.

6. In a powder sprayer, a receptacle comprising a tubular body portion and end members at the ends of the same, said tubular body` portion having laterally extending outlet openings therein at both ends thereof, a sleeve surrounding said body portion and spaced therefrom to form an annular passageway extending about said receptacle, said outlet openings discharging laterally into said passageway, means at one end of said passageway for forcing air through said passageway, means forv constricting the air entering the said passageway at the locality of one u of said lateral openings toprovide rapid expan- 9 sion of the air into the annular passageway and suction in said lateral opening of the receptacle and means forming an expansion chamber at the other end of said passageway and into which the air from the annular passageway discharges, said expansion chamber producing suction within the receptacle through the other lateral opening and discharge means at the other end of the said sleeve and communicating with said eXpansio-n chamber.

7. In a powder sprayer, a tubular case having a circumferential wall. and a closure closing one end of said case, a receptacle for powder within said case having a circumferential wall of lesser external diameter than the internal diameter of the circumferential wall of said case to form an annular passageway therebetween, an end member for said receptacle, means for spacing said end member from said closure to form an end chamber communicating with said annular passageway, said receptacle having a laterally eX- tending opening discharging into said annular passageway, said closure having a discharge opening centrally located therein and communicating with said end chamber and pumping means for forcing air through said annular passageway.

8. In a powder sprayer, a receptacle comprising a tubular body portion and end members associated therewith and closing the same at its ends, a sleeve surrounding said body portion and spaced therefrom to form therebetween an annular passageway, outlet openings in said receptacle arranged circumferentially about said receptacle to communicate with said annular passageway at different localities therein spaced circumferentially from one another, means at one end of said annular passageway associated with said sleeve for forcing air through said passageway, and discharge means at the other end of said. annular passageway including a chamber communicating with said annular passageway and receiving the discharge from any of said outlet openings.

JOSEPH W. CIMBURA.

EBEN C. IVES.

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

UNITED STATES PATENTS Number Name Date 1,406,903 Rose Feb. 14, 1922 1,571,311 Wittjen Feb. 2, 1926 2,063,871 Rose Jan. 26, 1937 2,215,937 Rutkowski Sept. 24, 1940 2,315,581 Berenson Apr. 6, 1943 FOREGN PATENTS Number Country Date 634.569 Germany Aug. 29, 1936

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