US1838042A

US1838042A - Bushing structure and sealing means therefor

Info

Publication number: US1838042A
Application number: US232722A
Authority: US
Inventors: Schwartz Henry
Original assignee: BARREL FITTING AND SEAL CORP
Current assignee: BARREL FITTING AND SEAL Corp
Priority date: 1927-11-12
Filing date: 1927-11-12
Publication date: 1931-12-22
Anticipated expiration: 1948-12-22

Description

Dec. 22, 1931. H. SCHWARTZ BUSHING STRUCTURE AND SEALING MEANS THEREFOR Filed Nov. 12. 1927 //E/vu (Ovi /9 072 6 M 7 Patented so. 22, 1931 i'rso STATES PATENT OFFICE HENRY SCHWARTZ, OF CHICAGO, ILLINOIS, ASSIGNOR TO BARREL FITTING AND SEAL CORPORATION OF AMERICA, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS BUSHING STRUCTURE AN D SEALING MEANS THEREFOR Application filed November 12; 1927. Serial No. 232,722.

This invention relates to a bushing structure and a sealing means therefor and has special reference to a structure such as is used as a bung for metallic barrels andother containers usually employed in storing or shipping oils or other liquids or semi-liquids.

More particularly, this invention relates to a hung or plug which is so constructed and arranged as to effectively prevent a leakage of the liquid or semi-liquid from the container during the shipping or storage thereof and also to a means for preventing access to the bung or plug in order to guard against an unauthorized opening of the barrel or container without such opening being detected.

In the embodiment illustrated and hereinafter described inthis application, the plug or bung is cast or otherwise formed with the hereinbefore referred usual tool engaging formations on the outer end portion thereof and is externally threaded to engage an internally threaded bushing of the barrel or container. However, in lieu of the usual sealing gasket between the bung and the bushing or between the bung and the wall of the container, a peripheral groove is cast or otherwise formed onthe upper portion of thebung in which groove is cast a material which is softer than either the material of the bung or of the bushing. The cast material in the groove is initially unthreaded and the peripheral contour thereof is coextensive with the external threads of the bung/When the bung is threaded in the bushing, the latter forms threads in the cast material, thereby providing a leakproof joint therebetween.

The castmaterial in the groove of the bung to is further employed as a securing means for positioning a hooklike member over the tool engaging formations on theouter end portion of the bung, the hood-like member being for the purpose of preventing an undetectable access to the tool engaging formations.

For a better understanding of the nature, characteristics and scope ofthis invention, reference may be had to the accompanying drawings and the following description in which drawings: I

Figure 1 is an end view of a portion of a Fig. 2 is a vertical sectional View taken on the line 2-2 of Fig. 1;

Fig. 3 is a side elevational view of the bung showing in particular the peripheral groove;

Fig. 4 is a perspective View of a hoodlike member adapted for use as a sealing means for preventing access to the tool engaging formations of the bung shown in F ig..3; and

Fig. 5 is a vertical sectional View showing an assembly of the bung and the sealing means therefor in the bushingof the container.

Referring now more particularly to the drawings, a barrel head or supporting wall of a container is shown and is preferably formed of a sheet material such as steel. A flanged portion 11 is preferably integrally formed with the head 10 and projects outwardly from the barrel or container to form a socket.

. The side walls of the flanged portion or socket are preferably polygonally shaped and receive therein a main body portion 12 of a similar peripheral contour. Although it is preferable to provide a regularly shaped socket in which to contain the main body portion, it is to be understood that any non-circular shape may be given to' this socket whereby the main body portion is prevented ,from turning in the socket. The main body ,"portion 12 is preferably formed of an internally threaded casting which may be made of malleable iron or other suitable material.

In the particular construction herein shown the edges 13 of the main body portion 12 are tapered, the taper converging rear wardly or inwardly from the outer surface thereof; that is, the outer diameter of the bottom surface is smaller than the outer diameter of the upper surface. The flange 11 is formed to snugly engage the tapered edges 13 to form a dove-tail in order to secure the body portion in a fixed assembled relation with the barrel head. The particular method 'of forming the engaging walls of the socket with the internally threaded body portion 12 is more fully described in my copending aptainer, it being necessary merely to provide an internally threaded supporting portion in which to position the bung.

A plug or bung 14 is provided with threads 15 to engage the internally threaded body ortion 12. The outer end portion of the ung 14 is provided with a tool engaging formation 16 preferably hexagonal in shape and another tool engaging formation in the form of a square recess 17 in the enlarged hexagonal head of the previously mentioned formation. The bung is preferably cast with a peripheral groove 18 near the upper end thereof and adjacent the threads 15, the groove providing a shoulder 19 in which latter a plurality of apertures 20 are preferably cast.

The sealing device of this invention is preferably comprised of a cap portion 21 and a skirt portion 22. The skirt portion has a flange member 23 formed preferably at right angles to the wall of the skirt portion, the flange 23 having a plurality of slot-like apertures 24: adapted to register with tures 20 formed on the shoulder 19 of the bung. Inthe assembly of the skirt portlon 23 to the bung 14, the flange23 seats against the shoulder 19 in a position so that the slots 24 and the apertures 20 are in register,.one with the other, whereafter a material is cast in the peripheral groove 18, some of the materia passing through the slots 24 into the apertures 20, thus holding the skirt portion 22 against rotation and in a fixed relation with the bung 14. The cast material results in the formation of a sealing band and may be of lead or a suitable composition softer than that of the body portion 12 or the bung 14. The lower outer periphery of the cast portion of the groove is coextensive with the outer diameter of the threads of the bung and tapers slightly outwardly from the container, or as shown in the drawings, upwardly therefrom.

The threaded portion of the bung is substantially vertical as is usual in these constructions. When -the bung is threaded into the body portion 12, threads are formed on the sealing band by the internal threads of the body portion 12, thus providing an effective seal to prevent leakage of the liquid or semi-liquid in the container. It is only necessary to form a little over a complete convolution of a thread in the sealing band the first time used and as provision may be made for the cast material to be of such a widthas to accommodate several threads, the

the aperbung ma be thus sealed a great number of times. n practice, after the first use, the thread previously formed in the cast material of the groove may be taken up and a further turn of only a portion of one convolution is necessary to form an effective seal. Further, the surplus material afforded by the taper of the cast material of the groove ultimately forms a sealing gasket when the bung is engaged sufficiently into the bushing.

There are regulators governing the variations in the sizes of bushings and bungs which permit of an amount of play between the engaging threads thereof. The sealing means are therefore forced to prevent any leakage of the contents of the container and receive little or no cooperation from the engagement of the bung and the business in which it is disposed. Heretofore, bungs are usually provided with flanges, and sealing gaskets are disposed between these flanges and the bushings or walls of the containers. It is quite diflicult to line up the engaging surface of the flange with respect to the axis of the threaded portion, and, as a result, the flange may not bear against the gasket on the entire surface thereof. Leakage is ordinary and not unusual. In the present construction, it is quite simple to align the sealing band or the cast material ofthe groove with the threaded portion of the bung and therefore the aforementioned difficulties are eliminated.

After the barrel or container is filled with a liquid or semi-liquid, and the bung is positioned in the flange, the cap portion 21 is placed over the

tool engaging formations

16 and 17 the outer end thereof being shaped so asto engage a beaded portion on the upper end of the wall 22 of the skirt portion. The cap 21 is preferably provided with a hood portion on the outer periphery thereof which is inserted in a female portion of the wall 22 where the same is clamped and cannot be removed without the removal being detected. The wall of the skirt portion 22 is spaced from the outer periphery of the bung in order that the wall must be deformed shouldan attempt be made to clamp a tool on the bung to unscrew the same. It will be readily apparent that the

tool engaging formations

16 and 17 are thoroughly guarded from an undetectable access by means of the cap 21 as the cap must be deformed in some manner in order to apply the necessary tools to engage the. same. The material of the cap and skirt portions are preferably formed of a very thin sheet metal such as tin which will readily tear or become ruptured or deformed if an attempt is made to obtain access to the contents of the barrel.

As a result of this invention, an effective seal for preventing leakage of the liquid or semi-liquid of a container is obtained in a novel manner by providing a comparatively soft metal in a groove formed adjacent the threads of the this sealing'means is further employed as a securing means for positioning a hood member over the tool engaging formations on the outer end portion of the closure means to prevent an undetectable access'to the contents of the container.

While but a single embodiment of. this invention is herein shown and described, it is to be understood that various modifications Will be apparent to those skilled in the art without departing from the spirit and scope of this invention, and therefore, it is desired that the invention be limited only by the scope of the prior art and the appended claims:

1. A bushing structure for containers comprising a threaded body portion adjacent a hole in a supporting wall of said container, a threaded closure plug for engagement with said threaded body portion, said closure plug having an annular groove therein and apertures extending from said annular groove, and sealing means in said groove having a fluid-tight forced engagement with the threads of said body portion, said sealing means extending into said apertures of said closure plug to obtain a fixed engagement therewith.

2. A bushing structure for containers comprising a threaded body portion adjacent a hole in a supporting wall thereof, threaded closure means having tool engaging formations on the outer end thereof for engagement with said threaded body portion, annular sealing means carried by said closure means, and means for covering said tool engaging formations carried by said closure I sealing means.

means and held in position thereon by said 3. A bushing structure for containers comprising a threaded body portion adjacent a hole in a supporting wall thereof, threaded closure means having tool engaging formations on the outer end thereof for engagement with said threaded body portion, annular sealing means carried by said closure means, and a hood for covering said tool engaging formations carried by said closure means and held in sealing means.

4. A bushing structure for containers comprising a threaded body portion adjacent a hole in a supporting wall thereof, threaded closure means having tool engaging formations on the outer end thereof for engagement with said body portion, said closure means having an annular groove thereon, sealing means disposed in said groove for making a fluid-tight forced engagement with the threads of said body portion, and a hood having a portion thereof extending into said position thereon by said closure means. Moreover,

means having an annular groove thereon,

sealing means disposed in said groove for making a fluid-tight forced engagement with the threads of said body portion, and a hood having an annular flange disposed in said annular groove and held in a fixed relation with said closure means. by said sealing means, said hood covering said tool engaging formations.

6. A bushing structure for containers comprising a threaded body portion adjacent a ole in a supporting wall thereof, threaded closure means having tool engaging formations on the outer end thereof for engagement with said body portion, said closure means having an annular groove thereon, said groove having apertures extending therefrom into the material of said closure means, a sealing band of soft material disposed in said groove for making a fluid-tight forced engagement with the threads of said body portion, a hood for covering said tool engaging formations having an annular flange disposed in said annular groove, said flange having apertures therein for registration with said apertures of said closure means, the material of said sealing band extending into both of said apertures for holding said sealing band and said flange ina fixed relation with said closure means.

7. The combination with a container havouter wall of greater diameter than said threaded connecting means thus affording a surplus of material in the formation of the thread in said band to form a sealing shoulder.

8. The combination with a container having an opening therein and threaded connecting means adjacent said opening, of closure means having threaded en agement with said connecting means, and sea ing means carried by said closure means adjacent the threads thereof having a fluid-tight forced engagement with the threads of said connecting means, said sealing means having a greater outer diameter than saidthreaded connection means thus'afi'ording asurplus of material a housing in the formation of the thread in said sealing means to form a sealing shoulder.

9. The combination with a container having an opening therein and threaded connecting means adjacent said opening, of closure means having threaded engagement with said connecting means and having tool engaging formations on the outer end thereof, for covering said tool engaging formations, and means for fixedly securing said housing to said closure means.

10. The combination with a container having an opening therein and threaded connecting means adjacent said opening, of closure means having threaded engagement with said connecting means, said closure means having an annular groove adjacent the threads thereof at least the depth of said threads, and sealing means in said annular groove having a greater outer diameter than the greatest diameter of said threaded connecting means whereby when said closure means is threaded into said connecting means a fluid-tight seal is effected on the upper end of said connecting means and at the threads thereof. 1

In witness whereof, I have hereunto subscribed my name.

A HENRY SCHWARTZ.