US2915251A

US2915251A - Hand operated aerosol spray device

Info

Publication number: US2915251A
Application number: US771175A
Authority: US
Inventors: Jr Harold D North
Original assignee: Engine Parts Manuf Co
Current assignee: Engine Parts Manuf Co
Priority date: 1947-08-29
Filing date: 1947-08-29
Publication date: 1959-12-01
Anticipated expiration: 1976-12-01

Description

Dec. 1, 1959 H. D. NORTH, JR

HAND OPERATED AEROSOL SPRAY DEVICE Filed Aug. 29, 1947 I T fig. flare/a 0. Wo /Z5 73 3 I "a ATTORN a HAND OPERATED AEROSOL SPRAY DEVICE Harold D. North, Jr., Shaker Heights, Ohio, .assignor to Engine Parts Manufacturing (30., Cleveland, Ohio, a corporation Application August 29, 1947, Serial N0..771,175

3 Claims. (Cl. 239-302) My invention relates to a hand operated spray'and relates more .particularly to a hand'operated spray of the hand. grenade or bomb type adapted to propel a fine spray of insecticide, perfumes, hormones, bactericides, therapeutics etc. under pressure, by action of a liquified gas,.such as Freon, carbon dioxide, propane, methyl chloride, nitrogen, or the like, contained in a closed chamber, the chemical substances being dissolved in such liquified gas and being freed of the solvent upon exposure to the air and change of solvent from liquid to vapor state. The great expansion of the solvent upon its change of state is employed in such related uses to propel the chemical.

It is an object of my invention to release the chemical contents. of such liquified gas chamber in the form of a predetermined spray, the liquified gas which carries the.

admixture evaporating upon contact with theatmosphere and acting primarily as a propelling or dispersing medium.

or vehicle for such chemical substance.

It is the further object of my invention to control the spray according to a predetermined velocity volume and spray pattern by means provided in said container.

Another object of my invention is to provide means in connection with the dispensing container described herein which will remove or filter particles therefrom.

Another object of my invention is to provide means for accentuating the spray characteristics of an Aerosol bomb of the type described.

A still further object of my invention is to provide a container and dispenser for such liquified gas solvents.

A further object of my invention is to provide a dispensing container of the type described which will be inexpensive to manufacture being composed of relatively few parts and highly efficient in use.

A further object of my invention is to so construct the dispensing container of my invention, to enable the same to be transported safely and to be perfectly sealed against accidental explosion.

Other objects of my invention will become more readily apparent from a review of the following description in which description reference will be had to the accompanying drawings, in which drawings:

Figure 1 is a vertical plan view, of the dispensing container of my invention, certain portions being cut away to illustrate more graphically the assembled relationship of the parts of my invention.

Figure 2 is a detailed view of a feeding element associated with the container of my invention, the lower part thereof being shown in side elevation.

Figure 3 is a detailed View of a valve adapted to be associated with the liquefied gas chamber of my invention.

Figure 4 is a front plan view taken from line 44 of Figure 1.

Figure 5 is a perspective view of a spring member associated with the thumb operated lever illustrated in Figures 1-4.

States Patent Figure 6 is a plan view of the cap and associated. valve usedin the embodiment of Figure 1.v

Referring now to the drawings in all of which like parts;

are designated by like reference characteristics, at 10., I. show a ball-shaped grenade type container, formed of two hemispherical metal shells, 2i) and 21, the upper shell, 20, having a peripheral band, 11, adaptedto betelescoped.

over a peripheral portion of the lower shell and to be The upper hemispherical shellf welded or brazed thereto. portion, 20, is formed with a central aperture, 22, through which a cylindrical tube, 23, is adapted to be projected,

the upper portion of the tube or stem insert, 23, being.

screw-threaded as shown at 12.. The stem. insert, 23, is further formed with ,a stepped relatively smaller diameter. portion, 13, and an inlet end, 14, which elongated portion is of relatively lesser diameter than the adjoining portion,

13, and threaded relatively wider. portion, 12. The,e1on-. gated portionof the stem, 14, may be formed .either inte-.

grally with the tube, 23, or separately formed and secured.

A. thumb operated lever 13 is secured to the tube 23,. l

as bestillustrated in Figures 1 and 4. The said lever is provided. with, a thumb operated portion, 19, securedby means of a pin, 24, to a ring member 25.telescoped over the upper end of the tube 23 above the positioning ring 17. saidring member 25 having a pair of apertured

upstanding members

26 and 26 through. which the pin. 24 is projected. A flat spring member 27 having a pair of eye members 28 and-2:3 journalled over the pin 24. is. provided with a pairof spaced

leg members

29 and 29 anda crimped portion 30 provided for a purpose. later herein described. The leg members and. crimped portion 36) are maintained. in contiguous relation to the under.- side of the thumb portion19 and a portion of the ring member 25 is adapted to beencircled by the adjusting or positioning'ring 17 and to be retained in av predetere mined position by means thereof. A small discharge orifice 31 is provided in a portion of the upper screw.- threaded portionof the tube 23and the adjustingring. 17 isturned sufficiently to enable the orifice 31 to bepositioned between the

upstanding members

26 and 26 Wherefore the spray material propelled through the orifice will be unobstructed.

A small valve, 32, similar to that in type of a tire valve, is screw-threaded by means of the screw-threaded portion 33 thereof within the tube 23, a spring operated stem 34 projecting upwardly of the threaded connection and adapted to be pressed downwardly by the crimped portion 30 of the spring 27 by means of pressure exerted thereon by the thumb operated lever 19. A perforated cap sealing member 35 is securely threaded over the upper portion 12 of the tube 23 and the ring member 25 and the stem 34 projects upwardly through the perforation 36 in the cap member 35.

Filtering material M, such as felt or like material or other porous element, is disposed within the narrow tube 23 and filters the liquid gas and the admixture carried thereby in solution form in the container, as Well as acting as a capillary feeding element. The tube 14 carrying the filtering material extends well into the container and into the solution extending to a point spaced from but adjacent to the bottom of such container (see Figure 1).

The filtering material also extends upwardly into the portion 13 of the tube. A portion of filtering material M is preferably first driven into the tube portion 14 until that portion of the tube shown at s is tightly packed by means of a rod driven into the tube to compress the material therein. The tube 14 is then preferably kinked or distorted, as shown in Fig. 2, a certain predetermined amount, to retain the initial compression, achieved by packing the Wad to a predetermined density and compression. A second length of filter material M, is then driven into the remainder of the portion of the tube 14, which acts as the capillary feeding element or wick as hereinbefore described. The filter provided is highly efficient in protecting the valve mechanism 32 and preventing such valve mechanism and discharge orifice 31 from clogging.

It should be noted moreover that the degree of com pression of the filter material is predetermined according to the density thereof and according to the predetermined rate of flow desired, said rate of flow referring to the rate of flow of the solution from the container through the discharge tube and orifice. The said predetermined rate of flow is achieved by the initial and retained compression of the first filter material which causes it to act as a throttle on the flow of the solution prior to its passage through the discharge orifice, providing the desired control of the spray produced as a result of the expansion of the liquifier gas, when the valve stem 34 is depressed permitting the flow of the same through the orifice 31 into the atmosphere.

The lower hemispherical shell is preferably apertured as shown at 41 and brazed or welded or soldered at 42.

It will be understood that certain changes may be made in the construction of my invention, as described herein in connection with the preferred embodiment of my invention, without departing from my invention and the scope of the appended claims.

I claim:

1. A dispensing device comprising in combination, a container for low pressure liquified gas solutions, said container being provided with a discharge conduit having a portion thereof projecting outside said container, a discharge orifice disposed in that portion of said discharge conduit disposed outside of said container, said discharge conduit having a portion thereof disposed within said container, valve means disposed within the said conduit, compressed filtering material disposed within that portion of the said conduit extending within the body portion and adapted to restrict the rate of flow of the said liquid through the said material at a pre-determined rate, said conduit being distorted at one point to maintain said material under compression, a ring member telescoped over said conduit outside said container, a lever pivoted upon said ring member, said lever adapted to operate said valve means to release the liquid under pressure through said discharge orifice.

2. A dispensing device comprising in combination, a container for low pressure liquified gas solutions, said container being provided with a central aperture, a cylindrical tube extending into said container, said tube being provided with an upper threaded portion having a small orifice therein, a stepped relatively small diameter portion, and an elongated inlet end, the threaded portion of said tube being projected through said container aperture, securing means being screw threaded thereon to retain said tube within the container, an adjusting ring telescoped over a portion of said screw threaded tube and upon said securing means, a thumb operable lever secured to said adjusting ring, valve means telescoped within the upper portion of said tube, said lever adapted to operate said valve means, compressed filtering material injected within the upper end of said tube to a point adjacent the valve means, a distortion in the tube for maintaining said material to a predetermined degree of compression, additional filtering material under less compression within the remaining length of the tube and extending to a point adjacent to but spaced from the Wall of the container, said additional material acting as a wick.

3. A dispensing device for low pressure liquified gas solutions, comprising a container for said gas solutions, valve means mounted to said container having means exterior of said container to actuate said valve, a fluid conducting conduit contained Within said container, said conduit comprising a tubular member having one end thereof connected to said valve means, filtering material under compression disposed Within said tubular member adjacent said valve means, said tubular member distorted at a medial portion thereof to maintain said filtering material under compression, and additional filtering material disposed within said tubular member adjacent the end thereof opposite said valve means.

References Cited in the file of this patent UNITED STATES PATENTS 453,650 Lockwood June 9, 1891 1,718,182 Rose et a1. June 18, 1929 1,878,490 Goss Sept. 20, 1932 2,l71,501 Gebauer Aug. 29, 1939 2,313,930 Gebauer Mar. 16, 1943 FOREIGN PATENTS 134,561 Switzerland Oct. 16, 1929 409,250 Great Britain Apr. 26, 1934 acec w