US1971727A - Pressure and sealing device for containers - Google Patents

Description

g- 28,.1934- 'w. c. PARROTT 1,971,727

PRESSURE AND SEALING DEVICE FOR CONTAINERS Filed July 21, 1933 2 Sheets-Sheet l Aug. 28, 1934.

w. c. PARROTT 1,971,727

PRESSURE AND SEALING DEVICE FOR CONTAINERS Filed July 21, 1933 zsheets sheqt 2 E Patented 1 934 PA ENT orncs 1.9711121 'rasssuaa Ann sesame nsvroa roa commas William 0. Psrrott, sumac, com. Application July 21, less, Serial No. 681.614

My invention relates to a pressure and device for containers and I declare the following to be a full,. clear, concise and exact description thereof sufiicient to, enable anyone skilled in the [art to which it appertains to make and usethesame, reference being had/to the accompanying drawings in which like reference characters refer to like parts throughout.

I The object of the invention is to provide a lo pressure and sealing device for use in insecticide sprayers, lacquer, spraying tanks, beer containers such as thermo-jugs, steel drums and barrels,

which utilizes air pressure for forcing the spray therefrom, that will be perfectly safe against explosions.

Heretofore in sprayer-s of the type herein described, the top portion has given way under force of the air pressure, from'within the container, 1 flown off into so injured the user. i I

One of the particular objections is to so construct the sprayer that its top and other portions will withstand the internal pneumatic pressure and not be able to fly off into space to the conseas quent injuring of persons.

In the present construction the top is made to seal the opening from within the container.

Another object is to provide alarger opening in the top for filling and cleaning the interior of go the container.

To this end, the top portion is secured from beneath. The object will be understood by referring to the drawings in which:

I Fig. 1 is a sectional view of'the device, parts broken away.

Fig. 2 is a detail view enlarged, showing a perspective of a member employed.

Fig. 3 is a detail enlarged view showing the 40. oval closure member.

Fig. 4 is a detail enlarged view showing the *locking bridge.

Fig. 5 is a sectional view of the threaded memhere for tightening the closure member.

5 Fig. 8 is a perspective view showing the upper part of the container with the oval sealing closure in place.

' Fig. '1 is a top plan view of the device..

Fig. 8 is an enlarged detail view showing a perso spective of a handle and immediate parts employed.

Referring more particularly to the device, it embodies a cylindrical, seamless brass tank of drawn metal 1, the bottom portion of said tank .55 1 is concaved at 2 to allow for yielding under space and often times seriouslydisposed 5 Claims. (Cl. 221-77) sealing excessive pneumatic pressure within the container formed by easing 1. Rings 3, 3 are attached to the outer surface of tank 1 by means of plates 4 and rivets 5, whereby to suspend the casing in a convenient location. W

The upper portion of tank 1 has formed therein an annular indentation 6 which provides a stop for the lower peripheral 'edge 7 of top 8. Top 8 is soldered or welded at 9 to the bent over upper part of tank 1. A large central oval shaped to aperture 13 is formed in top 8. Aperture 13 may be rectangular or any shape in which one dimension is longer than the other.

There is also a small aperture formed therein at 14 for the rlvetting of nipple 15 which has a 7.0 serrated or grooved upper end at 13 to grip and hold a rubber tube, not shown. A pipe is connected on the inside of the container with nipple 15 so as to communicate with its passageway. Said pipe 20 extends down into tank 1 and is 76 fastened by ring 22 to one side thereof. Its lower end 23 reaches very nearly the bottom portion 2 in order to insure emptying the contents of the container when the sprayer is in use.

The means for forcing the solution out of oas- 80 ing 1 in the form of a spray embodies a pump 25 within casing 1. Said pump 25 has a cylindrical casing 26 in which slides a reciprocating valve or piston 27 fastened to piston rod 28. The upper end of said rod 28 has formed integral 86 therewith handle 29 hereinafter described. The lower side of said casing 26 has at one part a depression formed at 30 to allow for the escape of air past valve'27 when in lowermost position, for otherwise the confined air below the piston would prevent the closing of a one way valve 31 hereinafter mentioned.

Moreover, a valve casing 32 is attached to the lower surface 33 of pump 25. Valve casing 32 has a seat at 34 for one-way spring pressed valve 31. A cap 36 having apertures 37 therein is screw threaded to the lower part of casing 32. Spring 38 disposed between valve 31 and cap 36 holds valve 31 upon its seat 34. Lower reduced end 39 of valve 31 has a sliding bearing in a cap 36.

When piston 27 is forced downward, valve 31 will be forced downward likewise to permit the air under pressure to move out through apertures 37 into the chamber of easing 1 and thereby build up a pneumatic pressure therein. Said valve 31 will automatically close as piston 26 moves upward to prevent the escape of said air.

Pump casing 26 is held in a detachable manner in central position within tank 1 by the following therewith. An annular groove mechanism embodying a member 40 having an upstanding cylindrical part 41 with external threads 42 formed on its outer upper surface and a lower or oval shaped flange 45 formed integral 46 is made in said flanged portion 45 for the reception of a sealing or rubber washer or gasket 48. Said gasket 48 rests against the under-surface of top portion 8 adjacent to the edge 49 thereof to aid in sealing the joint. Moreover, an annular projection or ring 50 is made by indentation in the lower surface of top 8. Said annular ring 50 embeds itself in gasket 48 to aid further in forming an air tight joint when the parts are assembled.

The neck piece 40 is held in position by means of a narrow co-operating bridge60. The ends of bridge piece 60 are bent at an angle, whereby the central part 61 and extreme horizontal end parts 62, 62 are in different planes. End parts 62, 62 rest upon the upper surface of the inner periphcry of top 8 when the parts are assembled. Said bridge piece 60 is projected through open recesses 63, 63 formed at diametrically opposite locations in the cylindrical part 41 of member 40. An aperture 64 is made in the enlarged central portion of throat piece 60 to allow for the reciprocating 'movement of piston rod 28.

Furthermore shoulders or elevations 65A, 65A are formed in the top surface of cover 8 at diametrically opposite locations for the disposition of the respective end- 62, 62, of bridge piece 60, whereby to anchor the same when assembled.

A cap member 66 is mounted to the external threads 42 of cylindrical part 41 of member 40. Said cap 66 has a central aperture for a purpose hereinafter mentioned. It holds in place, however, a washer 66-A disposed between the under surface of cap 66 and the upper edge of part 41 ofmember 40.

In order to prevent washer 66-A from turning, a part 6'7 is bent downwards to engage a correspondingly formed recess 68 in part 41.

A bushing 69 having internal threads is formed integral with washer 66A. The internal threads of bushing 69 are engaged by the complementary threads of member '70 which is free to turn independent of piston rod 28 through which it projects. The lower end of member '70 is reduced in diameter for mounting bridge piece 60 heretofore mentioned. Bridge piece 60 is mounted however so that member '70 can turn independent of bridge piece 60. A locking ring or nut '71 is screw mounted to the lower end of member '70 to hold bridge piece 60 in place.

The upper part of member '70 is formed with an overspreading flange '72 having an irregular periphery with recesses '73, '73 diametrically opposite each other to allow a passageway for the projection of L shaped hook members '74, '74 made integral with and depending from disk '75 that forms the lower part of handle '76.

When L shaped hooks '74, '74 are projected with their lower ends below flange '72, they will, on handle '76 being turned, engage the diametrically opposite shoulders '77, '77 formed on flange '72, whereby to cause member '70 to be turned in one direction, or when handle '76 is turned in the opposite, engage shoulders '78, '78 to cause it to turn in the other. Furthermore, recesses '79, '19 are made in the under side of flange '72, whereby to retain the lower horizontal parts 80, of hooks '74, '74 when using handle 29 as a carrier for casing 1. The elevations 81, 81 aid in the formation of recesses '79, '79.

In operation, casing 1 is usually suspended by rings 3, 3 from the wall or other convenient location.

When using the device as a sprayer, handle 29 is turned until L shaped hooks '74, '74 are opposite recesses '73, '73 and then pulled upward to release handle 29 from flange 29 can be moved up and down now "to actuate piston 2'7 in pump casing 260i pump 25. Its actuation will force air into casing 1 through one way valve 31 which will cause a pressure thereinthat will force the solution up through pipe 20 and out through nipple 15 and through a rubber hose and spraying nozzle, not shown.

Whenever necessary to refill tank spraying solution or for purposes of cleaning the interior. the following parts can be withdrawn bodily, namely, pump 25 and its connected parts, including member 40, its cap 66, washer 66-A,' member '70. This can be done by lowering handle 29 and turning it so that hooks '74, 74 will be opposite recesses '73, '78 and pushed below flange '72, the handle again turned to allow the sides of hooks '74, '74 to abut against shoulders '78, '78 and cause the turning of member '70 to unlocked position, thereby releasing the tension on bridge piece When handle 29 has been turned sufllciently to release the pressure of gasket 48 against the inner periphery of top portion 8, flange 45 will be turned at right angles the aid of handle 29 tipped to allow for its withdrawal with the connected parts above mentioned from tank 1.

The location of oval shaped flange 45 of member 40 being seated from within casing 1 against the under surface of top portion 8 not only assures against its being forced off its seat but also is in a position to utilize the pneumatic pressure from within casing 1 in sealing its joint.

In tightening the closing parts, it will be observed that as member '70 is forced downward by the turning of handle 29, a pressure will be exerted upon bridge piece 60. Simultaneously with pressure on bridge piece 60, washer 66-A will be forced upward, whereby to draw member 40 upward, thereby sealing the joint between gasket 48 and top 8. r

The threads in member '70 and corresponding threads of bushing 69 are predetermined to limit the allowable pressure upon bridge piece 60, beyond which would be the breaking point.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is as follows:

1. In a pressure and sealing device for containers, a casing having an opening at its top portion, a removable member suspended .within said casing, whereby to close said opening, a cylindrical part made integral with said removable member, a member screw mounted to said cylindrical part, a bushing mounted in said cylindrical part, another member having a flange mounted within said bushing, a bridge piece engaged by said last named member and means whereby the turning of said last named member will cause said bridge piece to draw the first mentioned member into closed position to close the opening in said casing. v

2. In a pressure and sealing device for containers, a casing having an oval shaped opening in its top portion, a removable cover suspended within said casing, a cylindrical portion formed integral with said cover, a cap member screw mounted to said cylindrical portion, a bushing mounted within said cylindrical portion, a memto its assembled position and with '72 of member '70. Handle 1 with the ber mounted within said bushing, a bridge piece engaged by said last named member, a piston rod projecting through said last named member and allowed to turn independently thereof and said piston rod having means to engage said last named member, whereby to turn same to draw the bridge piece and cover towards each otherto close the opening in said casing.

3'. In a pressure and sealing device for containers, a casing having an opening at its top portion, a removable member suspended within 'said casing, whereby to close said opening, a member cooperating with said removable member, whereby to lock said removable member in closed position, a member having a flange portion with recesses and shoulders formed thereon mounted on said cooperating member, and a rod having a handle attached thereto and having means for engaging the flange portion of said member, whereby the turning of the handle in one direction will seal the removable member in closed position and said means attached to said rod, being used also as a carrying member tor said container. A a

4. In a pressure and sealing device for containers, a casing having an opening at its top portion, a removable member suspended within said casing, whereby to close said opening, a cylindrical part made integral with said removable member, a member screw mounted to said cylindrical part, a bushing mounted in said cylindrical part, another member having a flange mounted within said bushing, abridge piece engaged by said last named member, means whereby the bridge member and another screw threaded member connected with said closing member, whereby the turning of said threaded members relative to each other will seal and unseal said closing member with reference to said casing.

WILLIAM C. PARRO'I'I.

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