Title:
Dispensing apparatus
United States Patent 2331117


Abstract:
This application is made under the act of March 3, 1883, as amended by the act of April 30, 1928, and the invention herein described and claimed, if patented, may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment...



Inventors:
Goodhue, Lyle D.
Sullivan, William N.
Application Number:
US41347441A
Publication Date:
10/05/1943
Filing Date:
10/03/1941
Assignee:
Claude, Wickard R.
Primary Class:
Other Classes:
128/200.14, 222/373, 222/424.5, 222/547, 239/342, 239/373
International Classes:
B65D83/14
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Description:

This application is made under the act of March 3, 1883, as amended by the act of April 30, 1928, and the invention herein described and claimed, if patented, may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment to us of any royalty thereon.

This invention relates to dispensing apparatus, and an object thereof is the provision in combination with a container adapted to hold a liquid 11 under pressure and a spray device for dispensing the liquid, of means for separating out a predetermined quantity of liquid in the container and expelling with the spray device this predetermined quantity as a unit dose so that each dose 1L dispensed will be exactly the same. This permits a high degree of controlled application. Just the right amount of spray is delivered upon each application and there is eliminated both the waste ordinarily resulting from the discharge of more 2( than is needed in a particular application and the inefficiency ordinarily resulting from the discharge of an insufficient quantity which is, in effect, also a wasteful application.

This invention is especially useful in the application of aerosols and fumigants, parasiticidal land others, but it Is not limited to such use and can also be used with such materials as cleaning fluids, paints (to apply a uniform coating over an area), and so forth. In the accompanying drawing there*are illustrated three preferred embodiments of this invention, in which: Figure 1 is an elevational section of one embodiment; Figure 2 is an elevational section of the second embodiment; and Figure 3 is an elevational section of the third embodiment.

The embodiment illustrated in Figure 1 comprises a container II adapted to hold a liquid 12.

Above the level of the liquid a well or pocket 13 of a predetermined volume open at the top 14 is secured to the inner side of the container. A spray device 15 of any suitable type desired having a nozzle 16, an operating valve 17, and an entry tube 18 depending therefrom is removably secured on the mouth 19 of the container by any suitable means, such as screw threads. The tube 18 extends downward into the pocket 13 and terminates at the bottom thereof. When the liquid 12 is of a type containing a component volatile at ordinary room temperatures such as dichlorodifluoromethane, carbon dioxide, methylbromide, and so forth, the gas produced in the container by volatilization maintains sufficient pressure therein to expel the liquid from the pocket 13 through the tube 18 and the nozzle 16 when the valve 17 is open, from whence it volatilizes or atomizes into the atmosphere. However, when the liquid is not sufficiently volatile, gas under pressure Sfrom an .external source may be introduced through a valved nipple 20. The pocket 13 is filled with liquid by inverting or simply tilting the container II, thence righting it again, leaving the pocket filled with a predetermined amount of 0 liquid which is expelled or liberated by operating the valve 17. When all of the liquid in the pocket is discharged, the valve .17 is closed, the container 11 again inverted or tilted, and the operation repeated for another application.

The embodiment illustrated in Figure 2 comprises a container or tank 2 , through the mouth 22 of which there is hermetically disposed the body of a bulb 23 closed with the exception of an opening 24 at the top, through which the Sentry tube 25 of a spray device 26 extends, and an opening 27 below the neck of the container at a predetermined point above the bottom of the bulb defining a given volume of liquid. The bulb should be proportioned so that the volume above Sthe opening 27 is greater than the volume below.

The bottom of the tube 25 is open and extends to the bottom of the bulb. The spray device 26 as in the embodiment illustrated in Figure 1 is of any suitable type having an operating valve 28 and a nozzle 29. The container may also be provided with a valved nipple 30 to permit the introduction of an external source of gas under pressure. In this embodiment the liquid to be sprayed is placed in the container through the mouth 22 after removing the bulb 23. The bulb is then replaced and the container inverted permitting the liquid to enter the bulb through the opening 27 and fill the portion between said opening 27 and the spray device. The container is then reverted causing the liquid to fall into the lower portion of the bulb below the opening 27. Any excess liquid spills out through the opening 27 into the container, so that a predetermined quantity of liquid is retained in the bulb ready to be expelled through the nozzle 29 of the spray device 26 by operating the valve 28. Gas pressure in the container 21 above the liquid therein will also operate against the liquid in the bulb 23 through the opening 26 and force it through the tube 25 when the valve 28 is opened.

The embodiment illustrated in Figure 3 comprises a container 31 surmounted by a bulb 32, the bottom 33 of which is open and connected to the mouth 34 of the container through a valve 35. At the top of the bulb 32 a spray device 36 is disposed, like that of the other two embodiments illustrated in Figures 1 and 2, and having a nozzle 37, an operating valve 38, and ad dependent entry tube 39 which extends to the bottom of the bulb 32. This apparatus is operatable only with a liquid volatile enough to create a pressure sufficient to expel it from the bulb 32 through the nozzle 37.' Liquid is introduced into the bulb by opening the valve 35 and inverting the container. The bulb will become only partially filled with liquid due to the presence of trapped air.

However, the bulb is so proportioned that this partial quantity will be the predetermined amount required for each dose or application. The valve 35 is then closed and the container reverted. The predetermined quantity of liquid in the bulb 32 is then ready to be discharged through the nozzle 37 when the valve 38 is opened, the gas resulting from volatilization of the liquid in the bulb furnishing the necessary pressure.

Having thus described our Invention, we claim: 1: An apparatus of the character described comprising a container to hold a liquified gas under pressure, a liquified gas receptacle of predetermined capacity secured to the inner wall of said container above the normal liquid level, a tube between said receptacle and the exterior of said container, and a valve in said tube, whereby when said valve is open, the pressure within said container will force liquid in said receptacle through said tube.

2. An apparatus of the type mentioned comprising a container to hold a liquified gas under pressure, a receptacle within said container of predetermined capacity above the normal liquid level, said receptacle being secured to the inner wall of the container whereby it can be filled by manipulating the container, a tube between said receptacle and the exterior of said container, and a valve in said tube whereby when said valve is open, the pressure within said container will force liquid in said receptacle through said tube.

3. An apparatus of the character described comprising a container to hold a liquified gas under pressure, a liquified gas receptacle of predetermined capacity secured to the inner wall of said container above the normal liquid level, and a valved tube from said receptacle to the exterior of said container.

4. An apparatus of the character described comprising a container to hold a liquid under pressure, said container having a mouth at the top thereof, a bulb hermetically disposed through said mouth, said bulb having an aperture through the side thereof below said mouth and at a predetermined point above the bottom thereof, the Svolume of the bulb above said aperture being greater than the volume below, and means associated wtih said bulb for expelling liquid in the bulb below said aperture.

5. An apparatus of the character described comprising a container adapted to hold a liquified gas under pressure, a receptacle of predetermined capacity secured to the inner wall of said container, said receptacle being open at the top, whereby the container can be manipulated to fill the receptacle with liquified gas in the container by causing the liquified gas to flow along the wall of the container above the receptacle, a spray device attached to said container above said receptacle, said spray device having a dip tube extending downward to the bottom of said receptacle, and a valve in said tube whereby when 85 said valve is open the pressure within the container will force liquid in the receptacle through said tube and spray device.

LYLE D. GOODHUE.

WILLIAM N. SULLIVAN.