US2537226A

US2537226A - Pressure holding and dispensing container

Info

Publication number: US2537226A
Application number: US714963A
Authority: US
Inventors: Richard H Lindsey
Original assignee: Bundy Tubing Co
Current assignee: Bundy Tubing Co
Priority date: 1946-12-09
Filing date: 1946-12-09
Publication date: 1951-01-09
Anticipated expiration: 1968-01-09

Description

Jan. 9, 1951 R. H. LINDSEY PRESSURE HOLDING AND DISPENSING CONTAINER Filed Dec. 9, 1946 l l lllllllrlll llll'l.

.JJ f M M a W, 2 M

Patented Jan. 9, 1951 UNITED sures PATENT QFFHCE p rationof Michigan ApplicationlDec mber 9, 1946, Serial No. 714,963

2 ClaifiiSi"-('Cl. 299- 9 5) This'invention relates'tcithe art of storing a" substance'in aipressure holding'contain'er and dispensingthe substance fromthe containenhy means'of'the pressure in the containeri One example is that of charging a vessel' or container-"with a"-volatile liquid together with an insecticide; In a situation o'fthis'kind/the liquid form for which-purpose itinay b'e-reduced to a==lmvtemperaturei and then the "vessel is* closed-unsealed: In due course, the vessel and" the contents reach ordinary room *temperatures,"* at which aternperatures the volati e liquid creates' a pressure-lathe vessel; andwhen'a smallport froin the time' 'ofthe initial charge until the vessel issubstantiaHy empty of the volatile liquid;

The' pres'entinven 'ion is concerned with the vessel or container for substances or combination of substances Ofitl'l' character above' recited; I It has been the practice.to provide'reatively expen' sive'scontainer's :for this purpose which were designedrlwiththe intent' thatfafter the charge in the containerissdispensed; the containeristo be re'urned to'the manufacturer or other plant for refillingii; 1,

The general object of th present invention' is'" to provide a simple vessel with a sealingand spraydevic'e for materials-Toff. the type mentioned and which can be so cheaply manufactured that it is economically 'feasible to throw the container Fig. 2. ,is an enlarged cross sectional view taken,

substantially. on line 2-2. of .L showing the valving and sprayv devices.

Fig. 3.is a top plan view of the vessel. ,,Fig. 4' is aperspective view illus'rating the top f of the .vesseland demonstrating its manner of.

, use. i. volatile liquid-is charged into the container "in As shown inl lig. 1,-the container is of cylin-' shape'for the container, a cylindrical wall I wi=h a bottom wall 2 atone end of the cylind'ri-l.

sarily has the strength required to. hold the intile substance and the tap wallisipreferably 'de pressed. as shown to thereby provide a reces's d'"- for accommodating the valve part and .spray part.

drical form, which is thought to be a convenient ll) may be. provided with an opening defined by a.

* liquid .tightjoint. Thelower end of the tube. is

awayraftertthe contents have been-discharged; Of course, it is within the inventionato refill' the container if such is desired, but even inthis case the initial manufacturing cost andinitial investment of the user is reduced. 1

As anexampleofthe materialswhich maybe usediwith-ithe Coutainenreference might be made; to the "use 'of the substance, commonly known T as Freon; as ,the volatilecharge which provides the pressure-and serves. as the carrier-for the insecticide which can bathe soecailed DDT which is believed to have been developed during the recent war. Of course, the invention is not limitedi=itof anyz particulan materials nor, for that matter, is: it l'ifnited-to the spraying of an insecti cidecasi the 'containerhmay bejf'used :icr spraying' open; as illustrated, andadiacent i.s.upper end, Q l but 'justjinside the top, the tube-is provided with a smalllateral opening 8. It will be appreciated, of course, that when terms such. as top or upperifor' bottom are used, that these are relative terms. This is the position the parts are shownin the drawings when use, the con-' tainer will usually be somewhere near an uprightiposition; although'thls may not be' necessynthetic or .of'material similar to rubber.

example, by. being soldered, thus to provide a materia1,"'.which. maybe termed a packingQis and the tube Gpasses through the packing; The

upper end of the tube is screw threaded as atQIZ for the reception of a cap M. This cap has an internal? chamber as illustrated, and provided is vvithintern'al threads for engagement with the 4 tube and the cap is arranged to abut against the packing ll. The'top of the cap is closed andis r designed .to freely receive-a valve member-prefer ablyin .the form of .a ball l5 arranged to seat in the u'ppe'hend of the tube which may hav an tively small passage 2| therethrough. The spray tube 20 has, preferably, a gas tight connection with the cap. If the cap it is a machined metal part, the spray tube 2!} may be soldered thereto;

if; the cap be a die casting the tube may be cast in position; if the cap is of molded plastic the tube 2!] may be molded to the cap.

" cal form and atop wall 3 'Tnisstructure neces- 1 ternal pressure which is developed by the V012;- is opened; there' is' a discharge'of some liquidated a h: discharge carrying some of the insecticide. Thus', -the insecticide'may be sprayed wherever d'esiredJ The pressureis maintained' in the vesseliin' a --substantia ly uniformimanner The spray tube 20, as shown in Figs. 2 and 3, extends laterally from the center position of the cap and is confined in the recess 4. Preferably, both the cap l and the spray tube are disposed below the upper edge of the cylindrical wall of the container so that the parts are out of the way and protected in normal shipment and handling operations. As a safety factor, a locking device, such as an abutment or small plate 26, may be secured to the top plate 3 and positioned to be engaged by the tube 20 to prevent accidental turning of the cap on its screw threads.

stance such as a volatile liquid carrier and an insecticide, a tube extending through a wall of the container and having a fluid tight seal with said wall, the end of the tube outside of the container projecting from the wall and having screw threads on its projecting end, a closed cap screw threaded on the tube and having a top portion overlying the open end of the tube, valve means within the As mentioned above, the vessel is charged with the volatile substance and the insecticide or other electedmaterials, while the volatile substance is in liquid form for which purpose the substance may be at a low temperature. The'stop plate 24 may be attached to the container at the time and by the operation of sealing the top plate 3 after the .vessel has been charged. Preferably, the

arrangement of the cap and the packing is such 7 that when the cap is screwed down to tightly engage the ball 16 with the seat H, the packing has been compressed to some extent. When the cap is screwed down tightly against the ball, the packing material has been compressed by about two full revolutions on the threads l2. Due to the fact that the spray tube has a small interior diameter, an opening at the valve seat 5! suflicient for the full capacity of the spray tube may be obtained by only a partial revolution of the cap l5. In this manner, even though the ball valve is fully open, to the capacity of the spray tube 20, the packing material remains compressed thus maintaining, at all times, a tight seal against the tube 6 to prevent leakage of the substance through the screw threads and packing.

When the vessel is initially charged the parts are intended to be in the position as substantially shown in Figs. 2 and 3 with the ball valve IE seated tightly on the seat I 1. This provides an effective seal for holding the contents in the vessel under the pressure developed. The packing I i has been compressed as above pointed out and the tube 20 is so positioned as to engage the stop plate 26 to prevent the unscrewing action of the cap 15. When the device is to be used, the operator or user bends the spray tube 20 upwardly as indicated by the full-line position of the tube as indicated in Fig. 4, so that the spray of the substance will pass over the top of the container. Now, by turning the nut l5 to efiect an unscrewing action, say for example, a partial turn as illustrated by the dotted lines in Fig. 4, the pressure on the ball I6 is relieved and thus the valve is opened. However, the packing I l remains compressed to prevent leakage along the screw threads. Upon the opening of the valve. the pressure in the vessel causes a forceful discharge as indicated in Fig. 4. Some of the liquid may discharge up through the tube 8 from the bottom thereof while some Vapors may enter the aperture 8 to effect an aspirating action. Thus, the discharged liquid or mixture of liquid and gas carries with it some of the insecticide for the spraying of spaces or objects.

I claim:

1. A container for holding and spraying a subcap engageable by the top of the cap to be urged against the open end of the tube to close the same as the cap is turned on its threads, restricted passage means in the cap for the discharge therethrough of substance from the container when the cap is turned on its threads to release the valve means, and a packing member comprising, a body of resilient packing material positioned around the tube and between the cap and the said wall of the container and normally compressed between the cap and the wall of the container to provide a fluid tight seal between the cap and the tube, said packing member having an axial extent such that when the cap is retracted from the wall of the container by the turning of the same on its threads, the packing member remains compressed to, at all times, maintain a fluid tight seal between the cap and the'tube.

2. A container, for holding and spraying substance such as a volatile liquid carrier and an insecticide, a tube extending through and sealed to awall of the container, valve means associated with the tube including an element rotatably mounted on the projecting end of the tube and turnable in one direction to close the valve means and turnabl in the opposite direction to open the valve means, a spray tube mounted on said element and arranged to communicate with the first mentioned tube when the valve is opened, said spray tube extending laterally from the first mentioned tube, and an abutment secured to the exterior of the container and positioned in the path of the spray tube upon rotation of the cap, whereby to engage the spray tube and lock the cap against rotation to thereby maintain the valve closed, said spray tube being bendable so that it may move past the abutment upon rotation of the cap.

' RICHARD H. LINDSEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS