US2948480A

US2948480A - Spraying device

Info

Publication number: US2948480A
Application number: US596037A
Authority: US
Inventors: Gilbert G Budwig
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-07-05
Filing date: 1956-07-05
Publication date: 1960-08-09
Anticipated expiration: 1977-08-09

Description

ofthe aspirator. port is notched;

SPRAYING DEVICE Gilbert G. .Budwig `1,400 Bayside walk, Mission Beach, Calif. Filed July s, 1956, ser. No. 596,037

z claims. (cl. 239-418) This invention relates to spraying devices, particularly spraying devices adapted to beattached to garden hose for the purpose of entrainng fertilizer, insecticides, and other -chemicals in the water. Included in the objects of this invention are:

First, to provide a spraying device of the aspirator type "wherein a substantial negative pressure' is created in the aspirator o-r suction tube so that chemicals to be er1- trained in the spray water may be withdrawn from an open container disposed several feet below the spraying device; as, for example, from a container resting on the ground to the spraying device when held in the hand of a person in standing position.

Second, -to provide a spraying device of this type which incorporates means whereby the water is discharged in a Fig. 2 is a side view thereof showing fragmentarily the aspirator tube;

Fig. 3 is an enlarged fragmentary plan view of the praying device, 'showing particularly the irnpinging surace; A Fig. 4 is a fragmentary sectional view thereof, taken through 4-4 of Fig. 3;

Fig. 5 is a fragmentary k5--5 of Fig. 4; Y f ,Fig. 6 is a fragmentary sectional View, similar to Fig. 4 but limited particularly to the region adjacent the aspirator port and indicating the course of the jet stream relative thereto when the'mouth of the aspirator port is urmotched; i Y

Fig. 7 is a similar fragmentary sectional view, showing the effect of the jet stream when the downstream margin sectional view, taken through Fig. 8 is a lagmentary plan view of the impingement plate corresponding to Fig. 3, showing the path of the entrained material without the use of a distributor ridge;

Fig. 9 is a similar fragmentary plan view, showing the distribution of the entrained material accomplished by use of the distributor ridge;

Fig. 10 is a fragmentary plan view of the impingement plate, showing a modified form of aspirator mouth;

Fig. 11 is a fragmentary sectional View, taken through 11-11 of Fig. 10;

Fig. 12 is a fragmentary plan View of the impingernent plate, showing a further modiiied construction of the aspirator mouth;

Fig. 13 is a fragmentary sectional view through 13 13 of Fig. 12;

mouth; and

Y Fatented Aug. 9, 1960 2 Fig. 14 is a fragmentary plan view of the impingement plate, showing a further modifled form of the aspirator Fig. 15 is a fragmentary plan view ofthe impingement plate, showing la further modified form of the aspirator mouth. A Y

The spraying device includes an internally screwthreaded hose attachment member 1 adapted to be screwthreaded to the end fitting of a hose. The axial end of the attachment memberr 1 is closed except for a coaxial forwarly extending jet nozzle 2.

A pair of integral bracket arms 3 extend forwardly from the attachment member 1. The bracket arms are joined to a supporting frame 4 having diverging side walls 5 and a semicircular extremity 6, which supports an inclined deck 7,disposed in obtuse relation to the axis of the jet lnozzle 2. The corners of the deck 7 are provided with mounting holes 8 which are bordered by knife ribs 9. The deck is also provided with a central clearance aperture 10.

The structure thusfar described may be a single piece die cast member.

Mounted-on the deck 7 is an impingement plate 11 having at its corners downwardly extending mounting stems 12, which are adapted to be forced into the mounting holes 8 and retained by the knife ribs 9, as indicated best in Figs. 4 and 5. k

The impingement plate 11 is provided with a downwardly extending tubular ripple 13 which projects downwardly through the aperture 10. The bore of the nipple -13 intersects the upper surface of the impingement plate 11 to form a port 14. The impingement plate 11 is so located relativeto the jet nozzle 2 that the water issuing "therefrom impinges on the plate 11 immediately downstream of the port 14 so as to spread in a fan-shaped sheet thereover.

Downstream of the port 14 the impingement plate 11 is provided with a depressed `area 15 which slopes upwardly from the port and merges at its forward or downstream margin into the normal surface of the impingernent plate. The port and depressed area form an aspirator mouth,

for purposes which will be described in more detail hereinafter.v

The upstream side of the port 14 is provided with a small V-shaped notch 16. Also, the impingement plate 11 is provided downstream of the depressed area. 15 with la crescent-shaped distributor ridge 17 disposed with its vconvex side facing upstream. The side margins of the impingement .plate 11 may be provided with upwardly extending downstream diverging side walls 18.

The nipple 13 is adapted to be connected to a suction tube 19, the lower end of which is intended to be dipped into la liquid to be entrained in the water issuing from the jet nozzle 2. This may ble facilitated by use of a weight member 20 secured to the lower end of the suction tube19. The weight member is provided with an upwardly directed tubular attachment nipple 21 to which the suction tube is attached and is provided with feet 22l so as to hold the weight member 20 clear of the bottom of the container in which it may be placed.

In practice, the spraying device is attached to the end of a hose and the container, in which the lower end of the suction tube 19 is dipped, is placed on the ground, or the container may be held in one hand While the hose and spraying device is held in the other.

It is Iessential in the operation of the spraying device that a substantial suction pressure be maintained at the mouth of the aspirator passage provided by the nipple 13 and suction tube 19, particularly when the spraying device is held in the hand and the liquid container is placed on the ground.

It has been found that the V-shaped notch 16 placed at the upstream side of the port 14 apparently greatly in! creases the suction or negative pressure in the aspirator. Without the notch the sheet of water seems to pass over the mouth of the aspirator, as indicated in Fig. 6, without deflection into the depression. The presence 4ofthe notch 16 seems to draw the sheet of water partially into the depression, as indicated in Fig. 7.

It is not certain whether the high negative pressure deflects the water downwardly, or whether the notch creates an unbalanced force of the Water to cause the deflection, but in any case'the negative pressure is in fact substantially higher.

The notch 16 need not be a V-shaped notch, but may be a small rectangular notch 22, as indicated in Figs. through 15.

Also, While the fan-shaped or triangular depression area has been found quite satisfactory, the depression may be circular, as indicated by 23 in Figs. 12 to l5. If the depressed area be circular, it has been found advantageous to have the maximum depth of the depression slightly downstream of the port 14. It is also possible to modify the configuration of the port so as to have a widened and curved eXit, as indicated by 24 in Fig. 14, or a chord-shaped exit 25, as shown in Fig. 15.

The distribution ridge 17 plays animportant part in thoroughly distributing the entrained liquid with the water. For example, in Fig. 8 without the use of the distributor ridge 17 there is a tendency for the entrained liquid, indicated by A, to become concentnated in the center portion of the fan-shaped stream B issuing from the impingement plate 11. By use of the distributor ridge 17 the entrained liquid is deflected laterally to the side margins of the water stream, as indicated in Fig. 9. It will be observed that the distributor ridge 17 is quite rudimentary and influences principally the underside of the sheet of liquid passing over the impingement plate 11, and does not disturb the general pattern of the water stream as a whole. As evident from Figs. 3 and 4, the ridge 17 is not only crescent-shaped in plan but is also crowned, that is, it is highest at its center and from there it tapers or converges in height laterally toward the surface of plate 11 and toward the side Walls 18.

The importance of uniform distribution ofthe entrained liquid is particularly obvious when the spraying device is used for the spraying of insecticides or weedicides on the leaves of plants. In suoh case, absence of the distributor ridge would cause the side margins of the water Astream to wash olf the chemical previously deposited on the leaves of the plant.

In using the spraying device for spraying fertilizer or other chemicals which are to be labsorbed in the ground, the distribution of the chemicals is not so critical. Thus for the spraying device intended primarily for such `use the distributor ridge may be omitted.

While particular embodiments of this invention have been shown and described, it is not intended to limit the same to the exact details of the constructions set forth, and it embraces such changes, modifications, and equivalents of the parts and their formation and arrangement as come Within the purview of the appended claims.

What is claimed is:

1. A combined hand sprinkler and aspirator for irrigating and applying chemicals to plants, comprising: an irrigation nozzle arranged for attachment to a hose and having a relatively large discharge orifice; an impingement means for deeeting Water issuing from said orice into a fan-shaped stream; said impingement means in cluding an elongated impingement and deiiecting surface positioned for obtuse engagement by water issuing from said nozzle, andupstanding walls forming with said defleoting surface an upwardly open and open-ended channel, said walls diverging fromsaid nozzle to confine the water to said deilecting surface and limit the included angle of the fan-shaped lstream discharged therefrom; a depressed area in said impingement surface; means defining an 'aspirator passage intersecting said depression for upward flow of aspirated uid into said water stream; and a raised transversely elongated spreader element on said impingement surface downstream of said depressed area, said spreader element having its greatest Vertical height `substantially midway between said side walls and converging toward said impingement surface laterally thereof toward said side walls, said spreader element functioning to laterally distribute fluid Withdrawn from said aspirator passage.

2. A combined hand sprinkler and -aspirator for irrigating and applying chemicals to plants, comprising: an irrigation nozzle arranged for attachment to a hose and having a relatively large discharge orifice; an irnpingement means for deecting water issuing from said orice into a fan-shaped stream; said impingement means including an elongated impingement and deecting surface positioned for obtuse engagement by Water issuing from said nozzle, and upstanding walls forming with said deflecting surface an upwardly open and open-ended channel, said Walls diverging from said nozzle to confine the water to said deflecting surface and limit the included angle of the fan-shaped stream discharged therefrom; a depressed Varea in said impingement surface; means deiining an aspirator passage intersecting said depression for upward ow of aspirated fluid into said Water stream; and a crescent-shaped rib disposed downstream of said depressed area generally transverse to stream flow and with its convex side facing said depressed area, said rib tapering laterally toward said side walls, to effect lateral distribution of aspirated duid withdrawn from said aspirator passage and depressed area.

References Cited in the iile of this patent UNITED STATES PATENTS 470,410 Pangle Mar. 8, 1892 1,705,188 Kelly Mar. 12, 1929 2,030,853 Budwig Feb. 18, 1936 2,508,392 Issaly May 23, 1950 2,622,052 Chandler Dec. 16,v 1952 2,744,791 Budwig May 8,v 1956 2,753,213 Olutt July 3, 1956 2,822,588 West Feb. 11, 1958 FOREIGN PATENTS 47,350 Sweden July 14, 1920