US2625431A - Packaged power sprayer - Google Patents

Description

Jan. 13, 1953 J. H. MUELLER 2,625,431

' PACKAGED POWER sPRAYER I Filed 001.. 6, 1947 2 SHEETS-SHEET 1 Y INVENTOR, Q2/7172. Wei/e1:

Jan. 13, 1953 MUELLER 2,625,431

PACKAGED POWER SPRAYER Filed Oct. 6, 1947 2 SHEETS-SHEET 2 INVENTOR,

.75/7/7 K/WZ/e/kl:

Patented Jan. 13, 1953 UNITED STATES PATENT OFFICE PACKAGED POWER SPRAYER John H. Mueller, Kansas City, Mo.

Application October .6, 194.7, fierial No. 778.1 53

2 C ai s- 1 This invention relates to new and useful improvements in a spraying apparatus, and has particular reference to sprays of the pressure type.

The principal purpose of the present invention is the provision of a spraying apparatus wherein a gas and a liquid such as an insecticide are delivered independently under pressure to a nozzle, said gas acting upon said liquid at the tip of said nozzle to produce a finely divided or atomized spray.

Another object is the provision of .a spraying apparatus wherein a gas and a liquid are delivered independently under adjustable pressure to a. nozzle, .said nozzle being .adiustable to shut ofi the gas to allow said liquid to be ejected in a :solid stream, or intermix said gas with said liquid to produce a spray of any desired degree of atomization.

A further object is the provision, in a spraying apparatus of the ,character described, of a nozzle adapted to be pivoted in a vertical plane to deliver a spray at various degrees of ele.va tion.

A still further object is the provision, in a spray apparatus of the character described, of a nozzle adapted to be pivoted to deliver a spray at various degrees of elevation, and operable at the limits of its oscillation to act as a valve for shutting ofi the gas and liquid spray.

Other objects are simplicity, compactness, and economy of construction, and efficiency and con.- venience of operation. With these objects, in view, as well as other objects which will appear in the course of the specification, reference will be had to the drawings, wherein:

Fig. l is a vertical longitudinal cross-section, with parts left in elevation, of a spray apparatus embodying the present invention, with the nozzle shown in its operating range in solid lines and at its shut-oil positions in dotted lines.

Fig. 2 is a plan view of the spray apparatus with thecover removed, and with the handle par: tially broken away.

Fig. 3 is a fragmentary vertical section taken on line III-III of Fig. 2, with parts left in elevation.

Fig. 4 is a fragmentary vertical section taken on line of Fig. 2. v

Fig. -5 is an enlarged fragmentary section taken on line v-.-v of Fi .2, w n t no zl s uc= ture.

Fig. .6 is a sectional View taken on line VI-.-.-VI of Fi 5.

Fig. 7 is a .reduced fragmentary section taken on line VIIVII of Fig. 5.

Fig. 8 is a verticalsection .takenon line VIII-.- VIIIof Fig. '7.

Fig. 9 is a vertical sectiontaken on line IXflX of Fig. 8,.

Fi 10 is a reduced external side elevation of the spray apparatus.

Fig. 11 is an external front elevation of the spray apparatus.

Like reference numerals apply to similar parts throughout the several views, and the numeral l2 applies to a hollow body member constructed of sheet metal or other suitable material. Said body member is substantially elliptical in horizontal cross-section, has a substantially planar top l4 and bottom [6, and is supported by a plurality of leg m mbers 18 i i fixed to itom {6. said body member is formed adjacent its rearward end to present a tube 2,!) extending ve tically t e thn u h and p n a bot nds. aid tube is adap d t carry a tt 21 of comp essed gas such a ai or ca b n i x e. and the remainder of said body member serves a a tank fo c ntainin a sp a l quid 24 u h as insecticide or the like.

Bottle 22 e tends substant ally a e t e op of body mem e 12, nd is e uip d a it u p r end with a shutoff va v 2. ma ual y ope a by me ns of hand whee 2. Sai va is inter? connected by means of ,union 3!] with vertical tubular standard 3; adjacent the upper end thereof. .Said standard is fixed ,at its lower end to top Id of body member I2 by means of a screw 34 immediately forward from tube 26, and supports the weight of gas bottle '22. Said standard is interconnected adjacent its lower end, w th a forward ex endi horizontal p p 36 by means of union 3B, and said pipe ,is connected at its forward end with a pressure reducing valve 40. Said valve is carried partially in a depressed well 42 formed therefor in .top. Id of body member 12, and is rigidly secured to said top by means .of mounting brackets 44 welded or other- Wis fixed to said op- A tu u a em e is is screwed into the outlet of said valve and extends outwardly through one of said mounting brackets, as shown in Fig. 3. A tube 48 is inter.- connected at one end with tube 4.6, and extends at its opposite end through top H! at Fill to admit the reduced gas pressure over the spray liquid 24 contained in the tank. A tube 52 is interconnected at one end with tube 46, and at its opposite end with the nozzle assembly hereinafter described.

The nozzle assembly is carried on a bolt 54 extending between and carried by apair of upright brackets 56 welded or otherwise rigidly secured to top l4 adjacent the forward end thereof. A non-rotating disc 58 and a rotating disc 6B are carried axially on bolt 54 and spaced apart by a sealing disc 62 of fiber or other suitable material, said sealing disc being fixed to rotating disc 60 and rendered rotatable therewith by means of positioning pins '64. Discs 58, 60 and 3 62 are urged snugly together by the tension of bolt 54.

Non-rotating disc 58 is formed to present two segmental annular recesses 66 and 68 in its surface adjacent sealing disc 58 said recesses being concentric with bolt 54 and disposed at diametrically opposite sides of said bolt. Tube 52 is rigidly fixed to the edge of disc 58 and interconnected with recess 66 by means of a hole I drilled radially in the edge of said disc. A tube I2, rigidly fixed to disc 58 and interconnected with recess 66 by means of a hole I4 drilled radially from the edge of said disc, extends downwardly through top I4 of body member I2 and to a point adjacent bottom I6, where it is fitted with a strainer I6. Tubes 52 and I2 have sufilcient rigidity to prevent the rotation of disc 58 on bolt 54.

Sealing disc 62 has a pair of circular holes I8 formed therethrough parallel with bolt 54 and disposed on diametrically opposite sides of said bolt, in such a manner as to be aligned with recesses 66 and 68 during a portion of the rotation of disc 60. Holes I8 coincide with a pair of matching recesses 80 and 82 formed in the adjacent surface of disc 60. Holes 84 and 86 formed in said disc are interconnected respectively with recesses 80 and 82, and emerge at the peripheral edge of said disc in close juxtaposition.

The nozzle 88, best shown in Fig- 5, includes a tubular body member 96 extending radially from disc 60 and communicating at its inward end with hole 84, and a tube 52 of substantially smaller diameter than the internal diameter of body member 90 disposed axially within said body member and offset at its inner end to communicate with hole 82 in disc 60. Body member 90 is externally threaded to receive sleeve tip 94 having an orifice 96 formed axially at its tip. Tube 92 extends outwardly beyond the outer end of body member 90, said extended portion being provided with an externally threaded enlargement 98 which is engaged by internally threaded sleeve tip 94 to support tube 62 against lateral movement. Enlargement 98 is slotted longitudinally at I00 to permit the passage of gas thereby. Tube 92 terminates adjacent the inner end of orifice 96, and is formed to present a corresponding axial orifice I02. Externally the tip of tube 92 is frusto-conical, and a matching frusto-conical recess I04 is provided internally in sleeve tip 94. Thus, normally an annular conical passage I06 for the passage of gas is formed about the tip of tube 92. The area of this passage is adjustable by screwing sleeve .tip 94 inwardly or outwardly along body member 90. When said sleeve tip is screwed inwardly till the wall of recess I04 contact the tip of tube 92, passage I06 is closed and the gas passing therethrough is shut 011". By screwing sleeve tip 94 outwardly, the amount of gas passing through pass-age I06 may be regulated closely. A locknut I08 and sealing washer IIO are carried on body member 90 at the base of sleeve tip 94 to fix the adjustment of said sleeve tip and to prevent leakage of fluid.

The'tank portion of body member I2 may be refilled with insecticide or other spray liquid by means of a filling tube II2 extending through top I4 and provided at its upper end with a removable cap II 4 and a sealing washer HE. A safety valve I I8 is provided for protection against excessive pressures in the tank. Said valve comprises essentially a tubular body member I communicating at its lower end with the tank through top I4, a downwardly seating valve disc I22 carried in said body member and adapted to cooperate with valve seat I24 formed therein, and a compression spring I26 abutting at its lower end against valve disc I22 to urge saiddisc to its closed position, and at its upper end against a cap I28 threadably engaged in body member I20. The tension of said spring is adjustable by turning said cap. Whenever for any reason the tank pressure becomes sufiiciently high to force disc I22 off of its seat against the pressure of spring I26, the gas will escape through holes I30 in the walls of body member I20.

A carrying handle I32 comprising an angled bar member is rigidly secured at its lower end to a clevis I34 having its arms pivotally carried by bolt 54 adjacent the outer surfaces of brackets 56, and at its upper end to the upper end of standard 32 by means of screw I36. A cover I38 is adapted to fit snugly at its lower side around the upper edge of body member I2, and extends upwardly to cover most of the working parts. Said cover is provided with a vertically disposed slot I40 at its forward end through which nozzle 88 projects and which permits oscillation of said nozzle on bolt 54. Carrying handle I32 projects outwardly through a hole I42 in said cover adjacent its lower end and through a hole I44 in said cover at its upper end. A hole I46 is provided for the stem of shut-off valve 26. Said cover may be removed after first removing screw I36 and hand wheel 28 of valve 26.

The operation of the spray apparatus is substantially as follows. When valve 26 is opened, gas passes under high pressure from bottle 22 through standard 32 and pipe 36 to pressure reducing valve 40, said valve being adjustable to reduce the gas pressure to any desired level. Gas under reduced pressure then passes through tube 52, recess 66 in disc 58, recess and hole 84 in disc 60, through nozzle body member 90, through slots I00 in enlargement 98 of tube 92, and thence to orifice 96 of sleeve tip 94. At the same time, gas under reduced pressure passes from reducing valve 40 through tube 48 to the tank containing spray liquid 24. Said liquid is forced upwardly by said pressure through strainer I6, tube I2, recess 68 of disc 58, recess 82 and hole 86 of disc 60, and thence through tube 92 of nozzle 88 to orifice I02 at the tip thereof. At the tip of the nozzle gas passing at a high velocity through annular conical passageway I06 impinges on the stream of liquid passing through orifice I02 to produce a finely divided or atomized spray or mist, said spray passing outwardly into the air through orifice 96 of sleeve tip 94. By adjusting sleeve tip 94 as previously described to vary .the area of passage I66, the ratio of the pressure, volume, and velocity of the gas relative to the spray liquid may be adjusted to produce a spray of any desired degree of atomization. When passage I06 is completely closed orifices I02 and. 96 form a continuous tube through which spray liquid will be ejected in a solid stream. This type of spray is particularly useful when it is desired to treat otherwise inaccessible spaces with insecticide or the like.

It will be noted that when nozzle 88 is pivoted in a vertical plane about bolt 54, recesses 80 and 02 of disc 60, and holes I8 of sealing disc 52 are moved respectively over arcuate recesses 66 and 68 of non-rotating disc 58. As long as the holes I8 of sealing disc 62 remain within the limits of arcuate recesses 66 and 68, the gas and liquid will fiow as described, but when the nozzle is turned far enough so that holes 18 pass outside the ends of said recesses, the gas and liquid flow is shut off. Thus, the oscillation of the nozzle operates as a valve. The nozzle is operative to deliver a spray at any point in a wide angle of elevation, but when it is pivoted to either extreme, as shown in dotted lines in Fig. l, the flow of gas and liquid is shut off. During periods of intermittent use, this means of control is simpler, quicker, and more convenient than the manipulation of hand wheel 28.

It is apparent that many minor changes of construction and operation could be made without departing from the spirit of the invention, and it is, therefore, desired to be limited only by the scope of the appended claims.

What I claim is:

1. In a spray apparatus of the character described wherein a spray fluid is delivered under pressure to a nozzle assembly carried by a body member, a nozzle assembly comprising a member fixed to said body member and a nozzle pivotally associated with said fixed member, said fixed member and said nozzle having relatively slidable abutting surfaces at right angles to the pivotal axis of the nozzle, said fixed member hav ing a recess formed therein inwardly from the abutting surface thereof, said recess being arcuately concentric with said pivotal axis and of substantial length, the spray fluid being delivered to said recess, and said nozzle having a relatively restricted recess formed therein communicating with the recess of said fixed member, said nozzle recess being interconnected with the orifice of said nozzle. and said nozzle being pivotal through an are greater than the angular length of the recess in said fixed member.

2. In a spray apparatus of the character described wherein a liquid and a gas are delivered separately under regulated pressure to a nozzle assembly, a nozzle assembly comprising a mem- 4 her fixed to said body member and a nozzle pivotsaid fixed member, said nozzle recesses being interconnected with the outlet orifice of said nozzle, and said nozzle being pivotal through an are greater than the angular length of the recesses in said fixed member.

JOHN H. MUELLER.

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

UNITED STATES PATENTS Number Name Date 515,552 Philips Feb. 27, 1894 927,430 Rockwood July 6, 1909 1,310,733 Bore et al. July 22, 19 9 1,314,294 Wilkerson Aug. 26, 1919 1,738,421 Corley Dec. 3, 1929 1,740,471 McBride Dec. 24, 1929 1,989,696 Kelley Feb. 5, 1935 2,125,573 Kelly, Jr Aug. 2, 1938 2,206,173 Ewing July 2, 1940 2,228,705 Olson Jan. 14, 1941 2,248,308 Rice July 8, 1941 FOREIGN PATENTS Number Country Date 517,936 France Dec. 23, 1920

Images