US2818028A - Liquid spraying device - Google Patents

Description

Dec. 31, 1957 s. M. BERMAN LIQUID SPRAYIYNG DEVICE Filed March 25, 1955 A Ii}; 20 15 1:: .14.: H 5+ 3 5? 58 6 h 9 INVENTOR SfgVZZBg/Jfl Bermaw BY moziadd mwamfm ATTORNEY5 nited States Patent ice 2,818,028 Patented Dec. 31, 1957 LIQUID SPRAYING DEVICE Sterling M. Barman, Fail-field, Conn. Application March 25, 1955, Serial No. 496,755

2 Claims. (Cl. 103-153) This invention relates to a liquid spraying device, and more particularly to a sprayer wherein the liquid to be sprayed is ejected under force in atomized form.

This application is a continuation-in-part of my copending application, Serial No. 422,741, filed April 13, 1954, wherein I have disclosed and claimed an apparatus for spraying liquids. In spraying devices of the type disclosed in my said co-pending application, it is desirable to create a vacuum within the bottom portion to cause the liquid to rush up into the discharge cylinder and for a substantial distance into the discharge tube whereby it may be easily discharged in an extremely advantageous manner under the downward stroke of the piston rod.

It is an object of the present invention to provide a sprayer for liquids in which the liquid may be very advantageously drawn into the discharge tube for discharge.

It is a further object of the present invention to provide a spraying device for liquids which will not clog up the working parts of the spraying device.

It is still a further object of the present invention to provide a spraying device for liquids which has the desired advantages, but which is nevertheless inexpensive to manufacture and easy to produce.

Other objects and advantages of this invention are shown'in the accompanying specification taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a side view of the sprayer embodying the present invention, partially in section;

Fig. 2 is a side view partially broken away and partially in section, of the means by which the liquid is sprayed from a container; and

Fig. 3 is a section taken along the lines 3--3 of Fig. 2.

Referring to the drawings, there is shown a liquid container which may be made of any" suitable material. External threads 11 are provided at the top of the container. A cap 12 having internal threads adapted to cooperate with the threads 11 is secured to the container as shown. To hold the sprayer while it is operating a handle 13 is provided.

An arm 14 of magnetizable material is secured to a magnetic vibrator motor (not shown) within the cap 12 of the container. When the coils of the vibrator motor are energized in the usual fashion, the arm 14 will rock pivotally about a predetermined axis. Movement of the arm 14 is limited by stops in the cap in a manner well known in the art. The motor is energized by means of electrical impulses through the wire 15 which passes through the handle and is connected to the motor. The other end of the wire is connected in the normal fashion to an alternating current supply source. The supply of electricity to the motor is controlled by the switch 16. The cover 12 is provided with a base plate 17 having an opening 18 adapted to receive a housing 19, as shown. The housing 19 engages the top of a cylinder 20 at the opening in the base plate 17. The housing 19 is provided with a plate 21 for the purposes hereinafter set forth. The cylinder 20 is provided with a bore 22. A piston rod 23 is movably carried within said bore 22. The piston rod 23 at its upper extremity has a collar 24 underlying the underside of one extremity of the arm 14. A coiled expansion spring 25 is mounted around the piston rod with opposite ends of the spring engaging the base of the collar 24 and the top of the plate 21 respectively. The lower portion of the piston rod extending into the bore of the cylinder is provided with an enlarged base 26 which is of substantially the same diameter as the diameter of the bore 22 of the cylinder 20 to form a virtually airtight interfitting relation therebetween. The lower portion of the cylinder 20 is secured to a check valve 28 by means of interfitting threads 29, as shown, or by any other suitable fastening means. The check valve comprises a housing 30, a ball 31, and an opening 32 in which the ball 31 rests. The screen (not shown) overlies the ball in the usual fashion. The cylinder is provided with an opening 35 for the purposes hereinafter set forth. The piston rod 23 is so disposed that in its maximum upward position the bottom of the base as is slightly above the aperture 35. A discharge tube 35 is provided adjacent the cylinder 20. The discharge tube has' an aperture 37 at the base thereof.

According to the present invention, I have provided a collar 38 press-fitted around the cylinder and the lower end of the discharge pipe. The collar 38 has a bore 39 to accommodate the cylinder 20. The collar is also provided with an opening 40 into which is fitted the base of the discharge pipe 36. A channel 41, having a slope for the purpose hereinafter set forth, is provided in the collar preferably of the same diameter as the diameter of the aperture 35 in the side of the cylinder and the diameter of the aperture at the base of the discharge pipe providing for communication between the aperture or outlet port 35 of the cylinder and the discharge pipe 36.

The upper extremity of the discharge tube is connected to a nozzle as described in my co-pending application.

Having thus described in detail the various parts of the sprayer of this invention, the coaction of these parts to operate the sprayer is as follows:

Container 10 while uncovered is filled with liquid such as paint, varnish, or the like. The cover carrying the interfitting parts thereinbefore described is tightly secured to the container. In this position the lower portion of the cylinder is immersed in the liquid in the container. The spring 25 normally urges the head 24 of the piston against the underside of the arm 14.

When the motor is energized, the arm 14 pivots about an axis within predetermined limit so as to rock, causing the underside thereof to strike the top of the head 24 depressing the spring 25 and causing the piston rod 23 to move down into the cylinder slightly beyond the aperture 35. The arm within rocks up, causing the spring 25 to urge the head 24 carrying the piston rod upwardly to a point where the base 26 thereof is slightly above the aperture 35 in the cylinder 20. This upward movement creates a vacuum within the bottom portion of the cylinder because of the airtight fit between the base 26 of the piston rod 23 and the bore 22 within the cylinder. The vacuum so created causes the ball 31 and the check valve 28 to become displaced and the liquid rushes into the bottom portion of the cylinder and above the aperture 35 and thereby through the sloping channel 41 into the discharge tube 36. The slope of the channel is of utmost importance in that the liquid rushing upwardly follows a normal path into the upward sloping channel. This structure is very advantageous in that a relatively large quantity of liquid enters the discharge tube on the upstroke of the piston. The next downward stroke of the piston 23 further urges the rela- 3 tively large -quantity of 'liquid' up into the discharge tube 36 for easy and forcible ejection from the nozzle 42 and nozzle cap 43. The above operation is thereafter repeated with the arm 14 rocking rapidly causing the piston to move up "and down a great number of times per second.- In otherproposed sprayers the vacuum'described is not-createdand the amount of liquid drawn up into the cylinder is -negligible.- In mostinstances' the cylinder itself acts as-the discharge tube. In those structures where a separate discharge tube is providech there is no co-relation -between the discharge tube and the cylinder as shown inthe present invention. It is to be noted that the vacuum createdcauses the liquid to rush up into it the cylinder-and, by means of the novel sloping channel 41,for a substantial distance, into the discharge tube. Thus it may be easily discharged in an extremely advantageous manner with great force by the pressure of the downward stroke ofthe piston rod 23.

discharge tube will present such clogging. A further advantage resides in the fact that anyclogging of the screen (not shown) or the opening 32 wherein the ball 31 is seated, will be eliminated by the force as exerted by the liquid seeking the vacuumwithin the cylinder. In the event, as may-occur in rare instances, that liquid does seep by the enlarged ibase-portion-26-and up into the upper portion of the cylinder, apertures 34 are provided in said upper portion of the cylinder so that the liquid may return therefrom into the container.

With the use of the collar of the present invention, 1

In other devices in which clean open communication specifically between the outlet port-35 of-thecylinder-and thedischarge pipe 36 -is accomplished. The resultant advantages are great in the easy and pressurized discharge of the liquid from the container.

While I have described my invention in some detail, it will be understood that variations and modifications may be made without departingttfromathe spirit of the invention and the scope oftheappended claims.

I claim:

1. In a pump construction fortan- -ato'rnizing apparatus, an elongate upright cylinder comprising a tube; a piston reciprocal therein; the-lo'wer'endof said tube having an inlet and means providinga ,check valveya fluid discharge pipe extending alongside of the tube, said tube having a discharge opening in a side wall thereof adjacent its lower end of said fluid discharge pipe being disposed a predetermined distance above the said discharge opening; and a collar extending aroundsthe pipe adjacent and ata distance above the lower end thereof, said piston-being located above the -collar and 'the lower end portion of said pipe being exposed belowsaid collar,'the latter enclosing the lower end of the-discharge pipe and having a sloping channel providing for 'communication'between the discharge-opening of-thetube andithelower end of the discharge pipe.

2. Theinvention as defined'in claim 1, in which the collar is pressed fitted-around the -tubeand the discharge pipe.

References. Clted'iimthe. ifile of=this patent UNITEDSTATES PATENTS 140,022 Evendenh June 17, 1873 280,106 Wheelen- June 26, 1383 364,667 Parker; June-14, 1887 1,317,483 Cannon Sept. 30, 1919 1,583,170 Fervier May-"4, 1926

Images