US2298680A - Spraying device nozzle - Google Patents

Description

Oct. 13, 1942. c. E. CLARK SPRAYING DEVICE NOZZLE v X i.. wm gag m z M w 2 r y .J R Y M 7 W 9 w w m 3 x a 7 a. W M 4 Filed May 17, 1941 Patented Oct. 13, 1942 OFFICE SPRAYING DEVICE NOZZLE Clyde E. Clark, Seattle, Wash.

Application May 17, 1941, Serial No. 393,989

4 Claims.

My invention relates to a nozzle for a spraying device. A particular application of utility of my device is in connection with spraying devices employed in spraying a finely divided mist of oil and air for use in oiling floors and the like. It is to be expressly understood that in giving such a particular application of utility I am not limiting the scope of my invention as my device will have utility in connection with spraying of vegetables, trees, flowers, etc.

As an example of sprayers of the prior art on which my nozzle is adapted to be used, I refer to United States Letters Patent 1,786,889, issued December 30, 1930, issued to H. E. Brandt, and United States Letters Patent 411,544,720, issued July '7, 1935, to the said H. E. Brandt.

A serious difliculty in prior art nozzles is during that period of time which may be termed the "starting period. During such starting period drops of oil or the spray material were deposited and the same were not completely atomized. It has, therefore, been common practice with many of the nozzles of the prior art to use a container, bucket, or rags and spray into the same until the spray device was operating satisfactorily and then the spraying of the floor or article to be sprayed was accomplished. Other difiiculties oi the prior art relate to the character of the spray and the lack of complete control of the volume of the spray.

It is an object of my invention to provide a spray nozzle which will provide for complete atomizing of the air and the liquid to be sprayed. as oil.

It is a further object of my invention to provide a nozzle over which complete control of the volume of the spray is possible.

It is a further object of my invention to provide a spray nozzle so that air is first sprayed and then later the oilis released into the air so that the first oil delivered is in the form of an oil and air mist, or spray, and there are no drops of oil emitted from the nozzle at the so called starting period.

It is a further object of my invention to provide a valve means which not only first delivers air but one which on closing delivers air after the oil has been cut off so that the air will tend to clean out the delivery end of the nozzle.

It is a further object of my invention to provide a plunger type of valve with valve means, seats and sealing gaskets in the form ofreplaceable units, so that upon the replacement of relatively inexpensive units and by tools which will on broken line 8-8 of Fig. 7'

be readily available on most occasions, an operator may replace any units and obtain a factory precision job rather than attempting to repair an inoperative or damaged part.

It is a further object of the invention to provide a pointed conical valve seating member seating on. a circular aperture so that a positive seal is provided when the device is not in operation to prevent leaking and the like.

It is a further object of the invention to pro-- vide a plurality of oil ports so that by movement of a piston or slide valve one port may be opened a graduated amount and after said first port is fully opened, the plunger may be further moved and a second port may be also opened a graduated and desired amount. 1

It is a further object of the invention to provide a mixing chamber wherein there is present air traveling at a relatively high velocity in a whirling or circular motion so that the spraying materials and the air are completely mixed to provide for the most complete atomization of the oil into an oil and air mist.

The above mentioned general objects of my invention, together with others inherent in the same are attained by the device illustrated in the following drawing, throughout which like reference numerals indicate like parts:

Figure 1 is a view in side elevation with portions shown by dotted lines of an illustrative oil floor spraying device equipped with a nozzle of my invention;

Fig. 2 is a sectional view ona larger scale than Figure 1, showing the nozzle of my invention and with fragments of the oil conduit, the air conduit and the operating rod attached;

Fig. 3 is a view in elevation with parts shown in section of the movable plunger valve of my invention;

Fig. 4 is a bottom plan view taken substantially on broken line 4-4 of Fig. 3;

Fig. 5 is a view in elevation showing the replaceable valve seat member which cooperates with the plunger valve of Fig. 3;

Fig. 6 is a sectional View taken substantially on broken line 6-6 of Fig. 5;

Fig. 7 is a bottomplan view of a washer employed between the plunger valve member of Fig. 3 and the valve seat member of Fig. 5;

Fig. 8 is a sectional view taken substantially Fig. 9 is a fragmentary sectional view on a still larger scale of parts shown in Fig. 2, and showing in full lines the valve and seat in closed position and by dot and dash lines in partially open position;

Fig. 10 is a fragmentary sectional view of a valve member which may be used in my invention and which will replace the valve member shown in Fig. 3: and

Fig. 11 is a fragmentary sectional view of a valve seat device which may be employed in connection with the valve member of Fig. 10 and which will replace the valve seat member shown in Fig. 5.

Referring to Figure l, a device on which my spray nozzle may be employed is illustrated. This device is used commonly for oil spraying of floors. The device comprises a housing 15, pump and pump chambers l5 and conduit I1 for delivery of compressed air at the top of the chamber l5. By the use of the usual check valve means (not shown) air is prevented from escaping from the chamber I5 by way of the conduit ll. By means of conduits I8 and 29 and interposed externally regulated valve I9, a desired supply of compressed air may be delivered from the top of the chamber l5 and above the oil supply to my nozzle which is shown generally by 2| in Figure l. A conduit 22 below the level of the oil in the chamber [5 serves to supply oil to my nozzle 2|. A handle 23 is provided so that the device is portable and may be readily carried from place to place. In order to provide regulating means in close proximity to such handle means 23, an extension rod 24 is provided connecting with the operating mechanism of my nozzle. The extension rod 24 slidably interfits through an aperture in the pivoted lever 21. Adjusting nuts 26 are provided to determine the extent of projection of the extension rod 24 through such aperture in the lever 21. A fixed stop 25 limits the angular movement of the lever 21 and the extent of downward movement of the extension rod 24.

The foregoing parts described in connection with Figure 1 are illustrative of a movable rod for regulating the extent of movement of the valve member of my invention, and the conduits 20 and 22 are merely illustrative of means providing a source of air under pressure and a source of oil under pressure to be delivered to my nozzle.

It is to be expressly understood that in so providing an operating environment for my nozzle I am not to be limited to the specific example so shown.

Referring to Fig. 2, the extension rod 24 is connected to the rod 29 and preferably by a flexible joint 28. The rod 29 is mounted for sliding movement in the opening 36 in the housing 35. A packing gland 32 is provided around the rod 29 to prevent the escape of air therepast. A compression spring 30 is mounted on rod 29 and has one end abutting the packing gland 32 and the other end abutting the piston valve 34, thus I urging the rod 29 downwardly against a stop afforded by the extension rod 24, lever 21 and fixed stop 25. Thus, by depression of the handle end of the lever 21, the rod 29 will be moved up wardly and by release of the lever 21, the compression spring 30 will move the rod 29 downwardly until the lever 21 engages the fixed stop 25. By adjusting the nuts 26, the extent that the compression spring 30 will urge the rod 29 downwardly may be regulated. The rod 29 is connected with the slide or piston valve 34 by means, as the pin 33. The piston valve 34 is shown detached and on a larger scale in Fig. 3

and is slidable in the cylinder members 45 (see Fig. 5) and 31 (see Fig. 2).

The piston valve 34 is provided with a central bore so that a chamber 38 is provided in said piston valve 34 in communication with the chamber 31 which is in turn connected with the air conduit 29. Thus a supply of regulated air under pressure is provided in communication with the chamber 38.

Referring to Figs. 3 and 4, an annular groove 40 is provided on the bottom surface of the piston valve 34. Ports 39 communicate between the chamber 38 in the piston valve 34 and the said annular groove 43. The said openings 39 are angularly disposed to provide a rotary motion of air in the annular grooves 43 shown by dotted lines in Fig. 4 of the drawings.

The lower portion of the piston valve 34 is provided with a pointed conical valve portion 4! and preferably with a fiat valve surface 44. The valve member 4| seals with the valve opening 43 of the packing member 42 (see also Figs. '7 and 8). The packing member 42 is preferably formed of steam packing or high pressure packing. The pointed member 4| will thus engage the opening 43 and the surface 44 will engage the packing 42.

I have shown an alternative construction in Figs. 10 and 11 where the fiat surface 44 and the packing 42 are eliminated. Such figures will be hereinafter later described.

The oil conduit 22 connects with the chamber 46 (see Fig. 2). This chamber 45 is formed between the housing 35 and the removable valve seat member shown in Fig. 5. Within the chamber 46 is provided a screen member 41. This screen member 41 is in the form of an annular cylindrical member. Obviously the screen member 41 is employed to screen particles or impurities which may be in the oil and is replaceable and removable by removing the removable valve seat shown in Fig. 5. Oil from the oil conduit 22 enters the annular chamber 43 and passes through the screen 41 and thence to ports 48 and 49. The piston valve 34 serves as a seal for the said ports 48 and 49. The port 49 is at a higher elevation than the port 43 so that as the piston valve 34 moves upwardly as respects the showing in Fig. 2, it will first open the port 48, and upon further movement will open the port 49. The lower edge portion 50 of the piston valve 34 (see Figs. 3 and 9) extends a distance below the port 48. Upon upward movement of the rod 29, air passes out openings 39 into annular chamber 49, out opening 43, and out opening 5|. Upon further movement of the piston 34, the oil in the port 48 is permitted to enter below the piston valve 34 and engage with the air circulating in the annular groove 49. In such annular groove 43, the entering oil and the air which is in a rotary motion in such groove will completely intermix and provide the desired oil-air mist. Such oil-air mist will be delivered out of the device through opening 43 in the washer 42 and out the opening 5| in the valve seat member shown in Fig. 5.

It is of particular importance in this invention to note (see Fig. 9) that the piston valve member 34 may be moved upwardly a slight distance which will permit the air from chamber 38 to pass through the openings 39 and thence into the annular groove 44 and thence out the openings 43 and 5|. At this period, the portion 59 has not raised suflicient to open the ports 48 so that air is in circulation and is delivered without any oil mixed therein. Upon further upward movement of the piston valve 34, the port 48 will be uncovered so that oil under pressure will be permitted to enter the annular groove 40 and there intermix with the circulating air. Upon further gradual upward movement of the piston valve 34, the extent of oil delivered by the port 48 may be regulated. After the port 48 is completely uncovered the piston valve 34 may be moved further upwardly and open the port 49 so that further oil may be delivered should a larger amount of oil be desired.

Upon closing movement of the piston valve 34, the piston valve will first close the port 49 and then in turn close the port 48. After the piston valve 38 has closed the port 48 it is possible to permit the air to flow for a desired period so that any oil adhering in the annular groove 40 will be blown out so that there will be no oil present to drip at undesired periods. Upon further downward movement of the piston valve 34, the openings 43-5l are closed and the flow of air from conduit 20 is interrupted.

Thus in the operation of the device embodying my invention, by regulation of the lever 21, air is first sprayed and later the oil is released into the air so that the first oil that is delivered from the spray nozzle is delivered in the form of an oil and air mist or spray and there are no drops of oil emitted from the nozzle at the so called starting period.

Also in my device, by operation of the lever 21, it is possible to provide for completely closing the oil and permitting a definite stream of air to be delivered so that after the oil has been cut off, the air will tend to clean out the delivery end of the nozzle.

The replaceable valve seat member shown in Fig. is provided with threads 53.which engage with threads 54 in the housing 35 so that the valve seat member of Fig. 5 may be readily removed. As the washer 42 shown in Figs. 7 and 8 will be carried by the removable valve seat member shown in Fig. 5, the same likewise may be readily removed. Also the screen member 46 surrounds such replaceable valve seat member and can be removed. By releasing the flexible joints 28, the rod 29 may be moved downwardly so that the piston valve 34 may be also removed. This also permits removal of the packing 32 which may require attention from time to time as is common with packing members.

By providing air valve means which are opened and closed by the end portion of a piston valve and oil valve means which are opened and closed by the periphery of the piston valve, I provide valve means which are successively opened and a construction eliminating possible leakage therebetween. Obviously both valves may be longitudinally positioned and opened and closed by the periphery portion of the piston valve but without the complete advantages of this invention.

Referring to the alternative construction shown in Figs. 10 and 11, a fragment of a traveling piston valve 55 is shown. The portions of the piston valve 55, which are broken away, will be similar in construction to similar parts of the piston valve 34, shown in Fig. 3, and for such reasons have been broken away. Also the removable valve seat 56 shown in Fig. 11 has been broken away in part, as such broken away parts will be similar to similar parts of the removable valve seat shown in Fig. 5. The purpose of the construction shown in Figs. 10 and 11 is to provide a ground joint or metal to metal seal as distinguished from the seal provided in the preferred construction Where the packing member 42 of Figs. 7 and 8 is shown. In the construction shown in Figs. 10 and 11, the pointed or conical valve member 51 is of metal and seats with an aperture 58 carried by the removable valve seat member 56. The ports 59 and 60 in the removable valve seat 56 correspond to the ports 48 and 49 of the removable valve seat shown in Fig. 5. The end portion 6| of the slide valve 55 corresponds to the end portion 50 of the slide valve 34 of Fig. 3. The annular groove 62 and the openings 63 thereinto are similar to the annular groove 48 and the ports 39 entering therein of the piston valve 34 of Fig. 3. The remaining part of the structure of Figs. 10 and 11 are similar to similar parts in the other figures.

By way of summary, in my device I have provided a housing member 35 having a cylindrical chamber 31 therein. An extension of said cylindrical chamber 31 is provided by either the chamber 38 in the cylindrical member 45 in the removable valve seat member shown in Fig. 5, and the similar chamber in Fig. 11. The end wall of such cylindrical chamber is provided by the removable valve seat of Fig. 5 or the said valve seat of Fig. 11. A slidable piston 34 of Fig. 3 or a slidable piston 55 of Fig. 10 is mounted for traveling movement in the cylindrical chamber above described. A first port, an opening 5| or opening 58, is provided on an end wall of the said cylindrical chamber of Figs. 2 to 9 01' 10 and 11 respectively.

When the traveling piston 34 is in its lowermost position as shown in Fig. 2, and by full lines in Fig. 9, the pointed conical valve member 4! seats against the opening 43 in the washer 42 closing opening 5|, or the conical valve member 51 of Figs. 10 and 11 seats against the opening 58 in the valve seat 56. Thus in the said position air will not be discharging from said first port. A second port means is provided in each construction as the port 48 of Figs. 2, 5 and 6, or the port 59 of Fig. 11. Also the ports 49 and 60 may serve as a part respectively of the second port means of the said figures, so that additional oil may be employed when desired. The first movement of the piston valve 38 will serve to permit air under pressure from the conduit 20 to pass through the opening in the piston valve and out the ports 39 of Fig. 4 and into the annular chamber 40 and thence out the opening 43 and thence out the port 5|. is moved from the full line position of Fig. 9 to the dotted line position of Fig. 9, air will be discharged via the opening 5| but oil will not be delivered as the piston valve 34 has not moved sufficiently for the portion 58 to pass and open the ports 48 of Fig. 2 or the similar ports 59 of Fig. 10. Upon further movement of the piston valve 34, the second port will be opened. In other words, the longitudinally spaced first and second ports open successively upon upward movement or movement in one direction of the piston valve 34 and upon reverse movement of the piston valve 34, the ports are closed in reverse succession. By the structure above described, I am able to positively provide for first discharging air so that oil may be gradually permitted to enter such whirling air in the annular ring 40 so that the first discharge from the device of oil and air will be the discharge of a mist of such oil and air. Upon closing the nozzle of my invention, first the oil will be shut oil and then When the valve the air will continue to flow to clean out the nozzle so that there will not be any oil present to drip during inoperative periods.

Obviously, changes may be made in the forms, dimensions and arrangement of the parts of my invention, without departing from the principle thereof, the above setting forth only preferred forms of embodiment.

I claim:

1. In a spray device, a housing member having a cylindrical chamber therein; a chamber closure and seat member on one end of said chamber, said seat member having a discharge orifice therein connecting with said chamber; a traveling piston in said chamber having an end wall movable into and out of seating relation with said seat member, said piston having a longitudinal passageway extending through said end wall, positioned out of registration with said discharge orifice, and connecting between portions of said chamber separated by said piston; conduit means connected with a source of air under pressure and connected to said chamber at a location operatively out of the path of travel of said piston; a port in the cylinder forming portion of said housing member, positioned in the line of travel of said piston to be opened and closed thereby, and positioned in spaced relation to said seat member; and conduit means connected with a source of oil under pressure and connected to said last mentioned port.

2. In a spray device, a housing member having a cylindrical chamber therein; a chamber closure and seat member on one end of said chamber, said seat member having a discharge orifice therein connecting with said chamber; a traveling piston in said chamber having at one end portion thereof an end wall movable into and out of seating relation with said seat member, said piston having in the seat contacting face of its end wall an annular groove positioned out of registration with said discharge orifice and having a longitudinal passageway connecting between said groove and the other end portion of said piston; conduit means connected with a source of air under pressure and connected to said chamber at a location operatively out of the path of travel of said piston; a port in the cylinder forming portion of said housing member, positioned in the line of travel of said piston to be opened and closed thereby, and positioned in spaced relation to said seat member; and conduit means connected with a source of oil under pressure and connected to said last mentioned port.

3. In a spray device, a housing member having a cylindrical chamber therein; a chamber closure and seat member on one end of said chamber, said seat member having a discharge orifice therein connecting with said chamber; a traveling piston in said chamber having at one end portion thereof an end wall movable into and out of seating relation with said seat member, said piston having in the seat contacting face of its end wall an annular groove positioned out of registration with said discharge orifice, having a duct angularly disposed to its longitudinal axis connected with said annular groove, and having a longitudinal passageway connecting between said duct and the other end portion of said piston; conduit means connected with a source of air under pressure and connected to said chamber at a location operatively out of the path of travel of said piston; a port in the cylinder forming portion of said housing member, positioned in the line of travel of said piston to be opened and closed thereby, and positioned in spaced relation to said seat member; and conduit means connecting with a source of oil under pressure and connected to said last mentioned port.

4. In a spray device, a housing member having a cylindrical chamber therein; a chamber closure and seat member on one end of said chamber, said seat member having a discharge orifice therein connecting with said chamber; a traveling piston in said chamber having an end wall movable into and out of seating relation with said seat member, said piston having a longitudinal passageway extending through said end wall, positioned out of registration with said discharge orifice, and connecting between portions of said chamber separated by said piston; conduit means connected with a source of air under pressure and connected to said chamber at a location operatively out of the path of travel of said piston; an annular chamber in said housing member; a port in the cylinder forming portion of said housing member connecting between said annular chamber and said cylindrical chamber, positioned in the line of travel of said piston to be opened and closed thereby, and positioned in spaced relation to said seat member; and conduit means connected with a source of oil under pressure and connected to said annular chamber.

CLYDE E. CLARK.

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