US2512778A

US2512778A - Sprayer

Info

Publication number: US2512778A
Application number: US657100A
Authority: US
Inventors: Ralph R Root
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-03-26
Filing date: 1946-03-26
Publication date: 1950-06-27
Anticipated expiration: 1967-06-27

Description

R. R. ROOT June 27, 1950 SPRAYER Filed March 26, 1946 INVENTOR.

/4 T Tof? A/Eys Patented June 27, 1950 UNITED sTATEs PATENT OFFICE SPRAYER Ralph R. Root, Lakewood, Ohio' Application March 26, 1946, Serial No. 657,100

2 Claims. 1

This invention relates to sprayers for insecticide and/or fungicide liquids, or the like, and aims to provide an improved spraying device of this kind comprising a relatively small number of parts enabling it to be economically manufactured and assembled and which can be manually carried and operated with relative ease for emciently delivering a spray of atomized liquid in a desired direction.

Another object of the present invention is to provide an improved sprayer of this character, having reciprocably telescoping cylinder and reservoir members forming an air pump and wherein air and liquid delivery conduits project outwardly from the reservoir member in coextending relation and carry an atomizing means.

l A further object of the invention is to provide an improved sprayer of this type, in which a handle connected with Ithe outer end of the reservoir member is adapted to be grasped by one hand of the operator while his other hand grasps the telesccping cylinder member.

Still another object of this invention is to provide an improved sprayer of this kind, in which the handle is hollow and extends in depending relation to the reservoir member and forms an extension of the main reservoir chamber.

Yet anotherobject is to provide an improved sprayer of this character having means by which it can, when not in use, be suspended in a manner such that leakage oi liquid from the device will not occur.

The invention can be further briefly summarized as consisting in certain novel combinations and arrangements of parts hereinafter described and particularly set out in the appended claims.

In the accompanying sheet of drawings Fig. 1 is an elevational View, with portions thereof in section, showing a liquid spraying device embodying the present invention,

Fig. 2 is a partial longitudinal sectional view of the device taken substantially as indicated by line 2 2 of Fig. 1,

Fig. 3 is a transverse sectional view taken on line 3 3 of Fig. 1,

Fig. 4 is a transverse sectional view taken on line 4 4 of Fig. 1,

Fig. 5 is a partial longitudinal sectional view on a relatively enlarged scale and taken on line 5 5 of Fig. 4, and

Fig. 6 is a transverse sectional view taken through the handle of the device as indicated by line 6 6 of Fig. 1.

In the embodiment of the invention illustrated in the drawing, the improved sprayer I0 includes a plunger member or reservoir member I I and a cylinder member I2 disposed in 4surrounding relation to the reservoir member and cooperating therewith to form an air pump. The device also includes a handle I3 connected with the outer f end ofthe reservoir member II and extending in l axially spaced transverse walls I1 andIB defining a valve chamber I9 in which a check valve 20 is operable. The inner end of the reservoir member II forms a plunger which cooperates with the adjacent end of the cylinder member .I2 in forming a pump chamber 22. 1

The valve chamber I9 of the reservoir member II is connected with the pump chamber 22 through the passage 23 of the axially extending tubular portion I3au of the wall I3. A valve seat 24 carried by the wall I2 and surrounding lthe passage 23 is sealingly engaged by the valve 20 when the latter is in its closed position, as shown in Fig. 5. The valve is retained in cooperating relation to the seat 24 by means of the cage 2.5.

The inner end of the reservoir member I I is also provided with a packing means which, in this case, is in the form of a cup-shaped flexible member 21 having an annular skirt 21a in sealing engagement with the wall of the cylinder member I2. The packing 21 is retained on-the reservoir member by having a body portion 21h disposed between the wall I8 and a retainer 28 which is carried by the central axially extending tubular portion I8a. The retainer 28 is provided with openings 29 which permit air to pass from one side of the packing 21 to the other during the inoperative or return stroke of the pump. The reservoir member I I is also provided with an air delivery conduit 3| which extends axially therein and has its inner end connected with the pump chamber 22 through the valve chamber I9.

The cylinder member I2 is an elongated tubular member which telescopically surrounds the reservoir member II and is reciprocable relative thereto. The inner or rear end of the cylinder member is closed by a transverse end wall or cap Iza, .At its outer or forward end the cylinder member is provided with a ring-shaped bushing 32 which is retained therein as iby means of screws 33 and has a guide opening 34 in which the reservoir member II is relatively slidable. The bushing 32 can be made of any suitable material but is preferably constructed by being molded from suitable nonmetallic or plastic material. This bushing is here shown as being less than a complete ring and having a gapor `opening 35 therein providing an :air inlet opening for admitting air to the pump chamber 22 from atmosphere. character so that it can be assembled onto the reservoir member II by being sprung` in a direction to expand the opening 35 a sufcient distance.

to permit the reservoir member I I to pass therethrough.

When the bushing 32 is constructed .with the opening 35 therein it also constitutes one element of a pair of cooperating bayonet locking elements for preventing axial separation cfthecylinder and reservoir members I2 and I I. The other of these-locking elements is a pin or'p'rojection 3S carried bythe reservoir member and located adjacent the outer end thereof. When the cylinder and vreservoir members are to be locked against relative separation the cylinder member is lmoved toits `collapsed position causing the pin-36 to travel through the opening 35, whereupon the cylinder member is rotated a suicient angular distance relativeto the reservoir member to bring the pin into holding engagement with" the inner end face of the bushing as shown in Fig. 3.'

The handle I3 isconnected with the outer end of the-'reservoir member II and, as mentioned above, extends in downward angular relation thereto. This handle may bia-constructed with aA tubular body 38 having `therein a chamber 39 forming an auxiliary reservoir. The handle I3 can be connected with the reservoir member II bythe soldering indicated at 40, or by any other suitable connecting means. At this Vpoint of the device, the wall of the handle member SB'is vprovidedwith openings4l which connect the auxiliary reservoir 39 with the main reservoir I 5`so thatthe auxiliary-reservoir forms a depending or angular extension of `the main 4reservoir, as shown in Fig. 1.`

The air delivery conduit 3| extends outwardly orforwardly from the reservoir member I I and, in this instance, extends transversely through and beyond the hollowhandle I3.l This A conduit is lprovided at its outer'end'with'a portion 43 of relatively reduced size and Ywhich is' curved or deflected downwardly relative to the longitudinal axis of the reservoir member. A liquid feeding tube l'or conduitv 44 also extends outwardly or forwardly from the reservoir member II for feeding therefrom the Aliquid spray material I5. This liquiddeliveryconduit is disposed above and in coextending relationtc the outwardly proj ecting portion of 'the V.air delivery conduit3l and also has a downwardly curved or deiiected outer end portion45.

The downwardly deflected end portions 43 and 450i' the air and liquid delivery conduits 3| and i4 constitute the atomizing means I4. For this purpose the end portion 45 'of the liquid delivery conduit isprovided with an orice 46 extending through the wall thereof and locatedon the upper side of the spraying device. An air delivery oriiice `III is located opposite-theorice i6 and extends through the adjacent walls of the-end portions v43 and li5-"of theair and liquid delivery conduits. The oriiiceedl is usually-oi a smaller This bushing preferably is of a springy '4 size than the orifice 46 and serves to direct a jet of air across the liquid conduit and outwardly through the oriiice 46. This jet of air eii'ectively atomizes liquid being supplied from the reservoir I5 by the delivery conduit 44.

The hollow handle I3 has an opening thereinto at its lower end which forms a filling opening for the main and auxiliary reservoirs. This filling opening is closedby a cap` 49 having a sealing gasket 50 thereon. As shown in Fig. 1, the liquid delivery conduit 44 extends axially within the hollow handle I3 and has its inner end located adjacent the filling opening. The cap i9 can be retained in its closed position by being provided with a nut 5I which cooperates with' a thread 52 formed on the inner end of the liquid delivery conduit. An opening 53 formed in the conduit at a point above the thread 52 connects the passage of the conduit with the auxiliary reservoir 3S adjacent the bottom of the latter.

In using `the spraying device I0, the operator ordinarily grasps the handle I3 with one hand and with the other hand grasps the cylinder member I2 and reciprocates the latter on the reservoir member I i. This relative reciprocation causes air to be compressed in the pump chamber 225011 each working stroke and to be delivered past the check valve Zil and through the coniduit' 3l to the orice 4l for producing the atomization of the liquid as described above. By grasping the handle I3 the operator can hold the device ina firm and steady manner and can readily direct the atomizing means I4 either upwardly or downwardly or in any other desired direction in which he may wish to discharge the stream oi atomized liquid. The vcheck valve 20 serves to prevent liquid from being sucked back int-o the pump chamber 22 from the atomizing means I4 during the return stroke of the pump.

When the device ii! is not being used, it is desirable to suspend the same in a convenient location and in a position such that liquid from the auxiliary reservoir 39 will tend to drain back into the-main reservoir I5. By having the liquid drain out of the auxiliary reservoir into the main reservoir no portion of the liquid supply will be in a position adjacent the opening 53 to leak from or be forced out of the liquid conduit 44. To ena-ble the device to be supported in this inoperative position, the end portion 43 of the air delivery conduit is provided with an attaching means which is hereshown in the form of an eye or a ring 55 adapted to be engaged with a hook, nail or other suitable support for suspending the device therefrom.

The eye 55 is located in downwardly offset relation to the longitudinal axis of the reservoir member II, such that when the device is thus suspended it will hang in a relatively inclined position to bring about the above mentioned drainage of spray material from the auxiliary reservoir 33 into the main reservoir I5 through the openings 4I. The small amount of liquid which may be trapped in the liquid delivery conduit 44 at the time that the device'is suspended on the support can either be left in this conduit or can be discharged therefrom by imparting a few pumping strokes to the cylinder member I2.

Thereafter, the liquid delivery conduit lili will remain empty until the device is removed from the support, whereupon liquid will flow back into the auxiliary reservoir from the mainreservoir.

While the device Il! is suspended by the eye 55 las just explained above,A the locking Spin 36 will prevent the cylinder member I2 from dropping to its extended position.

From the foregoing description and the accompanying drawing it will now be readily understood that this invention provides an improved sprayer which is of a relatively simple construction and which will be easy to carry and operate. It will also be seen that this device will operate in a positive manner and will emciently deliver a stream of atomized liquid regardless of the direction or position in which the device is being held by the operator. Moreover, it will be seen that when the device is not in use it is adapted to be conveniently suspended so that there will be substantially no leakage of liquid from any part of the device.

Although my improved sprayer has been illustrated and described herein in more or less detail, it will be understood of course that the invention is not to be regarded as correspondingly limited but includes all changes and modications coming within the scope of the appended claims.

Having thus described my invention, I claim:

1. A spraying device comprising, telescoping relatively reciprocable cylinder and plunger members forming an air pump, said plunger member having a reservoir therein adapted to contain a supply of liquid spray material, a handle connected with said plunger member and extending downwardly therefrom and adapted to be grasped for holding the device during the relative reciprocation of said members, a liquid delivery conduit extending iorwardly of said handle, and an air delivery conduit extending forwardly of said handle and disposed beneath said liquid delivery conduit in adjacent coextending relation thereto, said conduits having their outer end portions extending forwardly and downwardly and said end portion-s having cooperating atomizing oriiices on the tops thereof.

2. A spraying device comprising, telescoping relatively reciprocable cylinder and plunger members forming an air pump, said plunger member having a main reservoir therein adapted to contain a supply of liquid spray material, a handle connected with said plunger member and extending downwardly therefrom and adapted to be grasped for holding the device during the relative reciprocation of said members, said handle having a chamber therein forming an auxiliary reservoir which is connected with said main reservoir, air and liquid delivery conduits extending forwardly of said handle, forwardly downwardly extending atomizing means carried by said conduits, and means connected with said atomizing means and engageable with a support for suspending the device in a position in which the liquid in said liquid delivery conduit tends to drain back into one of said reservoirs.

RALPH R. ROOT.

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

UNITED STATES PATENTSy Number Name Date 1,020,833 Manning Mar. 19, 1912 1,223,655 Arden Apr. 24, 1917 1,427,495 Norris Aug. 29, 1922 1,845,200 Segal Feb. 16, 1932 2,017,145 Dunn Oct. 15, 1935 2,409,987 Schroeder et al Oct. 22, 1946 2,435,527 Arpin Feb. 3, 1948