US2101813A - Receptacle and closure - Google Patents

Description

Dec. 7, 1937. w. LOCKHART 3 RECEPTACLE AND CLOSURE Filed May 2, 1935 INVENTORl ATTORNEYS Patented Dec. 7, 1937 UNITED STATES PATENT GFFICE BECEPTACLE AND CLOSURE Application May 2, 1935, Serial -No.- 19,440

7 Claims.

My invention is an improvement in metallic receptacles and closures therefor and relates more particularly to a clamping ring for removably clamping the cover on the receptacle in fluid tight 6 sealed relation thereto.

One of the objects of my invention is to removably clamp a cover upon a receptacle by providing a split contractible channeled clamping ring to engage the cover and receptacle and press the 10 same together in fluid tight sealed relation and means for contracting the ring to this end.

Another object is to provide means for contracting and/or expanding the ring including one or more levers having slidable engagement with 15 the ring ends and means positively connecting said levers where a plurality are used, or connecting one lever and an end of the ring where a single lever is employed.

A further object is to exert a lateral pressure against the cover flange by said lever orlevers.

when they are operated to contract the ring and to thereby more uniformly distribute the closing forces exerted by the ring on the cover around the same.

Other objects are the simplicity of the device, its low cost of manufacture and its ease of operation. Other objects and advantages of the invention will become more apparent from the following description of two embodimentsthereof, reference 30 being made to the accompanying drawing in which like reference characters are employed to designate like parts throughout the same.

In the drawing: Figure 1 is a top planview of'bne embodiment 35 of my invention shown applied in use;

Figure 2 is an enlarged section taken on line- 2--2 of Figure 1;

Figure 3 is a fragmentary plan view of the first embodiment of the invention and shows the 40 parts in their respective positions when the ring is fully contracted to seal the cover on the re- 'ceptacle in fluid tight relation; I

Figure 4 is a view similar to that shown in Figure 3, and shows the positions of the parts when 45 the ring is expanded to remove it and the cover from the receptacle;

Figure '5 is an enlarged elevation looking in the direction of line 5-5 of Figure 3; and,

Figure 6 is a view similar to that shown in 50 Figure 3 and illustrates a second embodiment of the invention in which but one lever is employed.

Referring now more particularly to the drawing, the barrel or drum is indicated at I. The

55 upper open end of the container is formed with a peripheral bead 2. A cover 3 comprising a cupped or depressed head, having a peripheral upwardly and outwardly extending flange 4, is supported by the head 2 in such a manner that the cupped portion of the headorlcover may be telescoped 5 for a short distance within the open end of the drum, as illustrated in Figure 2. It will be noted that a portion of the flange 4 is of substantially arcuate cross section to conform with the approximate curvature of the upper surface of the bead. 10 A packing 5 consistingv of an annulus of any suitable packing material, such as flexible rubber tubing or cork, is interposed between the flange 4 and the head 2. v I ,v

According to the present invention, I have pro-, 18 vided an improved means for removably securing the cover on the drum or receptacle to efiect a fluid tight seal therebetween by exerting a substantially ,uniform and firm pressure along the cover flange and bead in a direction substantially 20 parallel to the longitudinal axis of the drum.

Such means preferably includes a transversely split, channeled clamping ring 6 of substantially U-shaped cross section and which is capable of being expanded and contractedby suitable means. Inthe form illustrated the upper and lower flange and bead engaging walls respectively of the ring converge slightly toward the outer diameter of the ring and engage the cover flange and bead .of the container to press the same together tightly when the ring is contracted. However, it is to be understood that the ring and receptacle open end may be so designed that the cover-will be pressed into a tight seal with a shoulder formed at the receptacle open end when the ring is expanded. That is, instead. of the receptacle being formed with a rolled bead 2, the open end may be formed with an annular shoulder and an annular channel for receiving an expander type ring, a packing ring and the cover.

,By contracting the type of clamping ring herein illustrated, the cover flange will be pressed tightly against the packing -5 and the supporting bead 2 under a substantially vertical pressure.

Referring first to Figures 1 to 5 inclusive, I

have illustrated one embodiment of the invention in which the operating mechanism includes a pair of levers having slidable pivotal connection with the ends of the ring or with brackets or lugs extending from these ends. The levers are also connected together by means voi! a link or ridging member. o

More specifically, the ends ofthe ring 6 are provided with inwardly extending lugs or brackets I and 8 respectively, welded thereto or formed 55.

integral therewith. The ring contracting and expanding levers 9 and II) are enlarged at their fulcrumed ends as at H and I2 and are slotted at l3 and I4 respectively to slidably receive bearing members or studs l5 and it carried by the lugs or brackets l and 8 respectively. The studs may be equipped with roller bearing sleeves (not shown) to minimizethe friction between them and the walls of the slots. It is to be noted that the slots are curved and may generally be arcuate in shape. Spiral, involute. or other curves may define the slots l3 and I4 if desired.

Thus the levers II and ii are slidably and pivotally connected to the respective lugs I and 8. The levers are also pivotally connected together at I! and 18 by means of a bridging member [9. The member l9 ispreferably a flat strip or metal and is upset at its ends 20 and II to provide an intermediate oiIset portion. Z

The curved slots 13 and II extend inwardly from the inner ends of the levers and traverse substantially the enlarged iulcrumed ends of the levers, and while I have shown both the slots II and ll of substantially the same curvature, one of the slots may be formed along longer or shorter radii. In this manner the individual throws of the levers may be varied. For instance, the radius of the slot ll may be longer than that of the slot l3. Thus by first swinging the lever 9 to closed position as in Figure 3 a certain degree of contraction will-be imparted to the ring which may be suflicient to hold the cover in place for shipping the drum empty. But by Subsequently swinging the lever [0 to closed position, as in Figure 3, the longer radius of the slot ll will impart an even greater degree of contraction to the ring sufiicient to press the cover and receptacle together in fluid tight sealed-relation. In the particular embodiment shown, however, the slots are formed on substantially equal radii, but the radii are of suilicient length to impart a fluid tight seal when both levers are moved to ring contracting position.

The lever ends ll.and I! are provided with a cam-like bearing surface'22 and 23 respectively for engagement with the upwardly extending portion of the cover flange 4 to exert an outward radial pressure thereagainst when the levers are moved to the position shown in Figure 3. This outward pressure materially aids in properly seating the ring on the cover and receptacle by more uniformly distributing the closing forces around the ring as the ring is contracted.

In Figure 6 I have illustrated a modified embodiment of the invention in which a single lever 30 is employed. In this form of the invention the lever 30 is slidably and pivotally connected with one of the lugs 1 by means of the stud 3| carried by the lug and operating in the curved slot 32 in the fulcrumed end of the lever. The lever is pivotally connected with the other end of the ring or'the lug 8 by means of a link 33 pivoted to the lever at one end as at. 34, and at its other end to the lug 8, as at 35.

While I have described the illustrated embodiments of my invention in some particularity, obviously many others will readily occur to those skilled in this art, and I do not, therefore, limit myself to the precise details shown and described but claim as my invention all embodiments, variations and modifications thereof coming within the scope of the appended claims.

I claim:

l. A device for removably clamping a cover on the open end of a metallic receptacle including a.

split locking ring having portions engaging the cover and the receptacle to press the same together when the ring is contracted, lugs extending inwardly from the ends of the ring defining the split and means for contracting and/or expanding the ring, said means, including a lever, having an arcuate bearing formed therein near one end, a member carried by one of said lugs and having a driving connection with said lever through the bearing, and a toggle pivotally connected with said lever and said other mg.

2. A device for removably clamping a cover on the open end of a metallic receptacle including a split loci-ringv ring having portions engaging the cover and the receptacle to press the same together when the ring is contracted, lugs extending inwardly from the ends of the ring defining the split and means for contracting and/or expanding the ring including levers slidably carried by said lugs, one of said levers having a slot formed therein for slidably receiving a stud, a stud on one of said lugs and operating in said slot, and a toggle pivotally connecting said levers.

3. A device for removably clamping a cover on the open end of a metallicreceptacle including a, split locking ring having portions engaging the cover and the receptacle to press the same together when the ring is contracted, lugs extending inwardly from the ends of the ring defining, the split .and means ior contracting and/or expanding the ring including a lever, a stud in-one of said lugs, said lever having a closed slot formed therein for receiving said stud whereby to permit a limited relative sliding driving connection between the said one lug and said lever, and a toggle pivotally connecting said lever with said other lug.

4'. A device for removably clamping a cover on the open end of a metallic receptacle including a split locking ring having portions engaging the cover and the receptacle to press the same together when the ring is contracted, lugs extending inwardly from the ends 0! the ring defining the split and means for contracting and/or expanding the ring including a lever carried by one of said lugs and having a slidable pivotal connection with said lug whereby the fulcrum of said lever may be shifted, and means cooperating with saidlever and the other of said lugs for effecting contraction and/or expansion of said ring, said lever having engagement with said cover to impart an outward radial pressure against the cover when the ring is contracted.

5. A device for removably clamping a cover on the open end of a metallic receptacle including a split locking ring having portions engaging the cover and the receptacle to press the same together when thering is contracted, lugs extending inwardly from the ends of the ring defining the split and means for contracting and/or expanding the ring including levers slidably carried by said lugs and-a toggle pivotally connecting said levers, one of said levers having a portion.

engaging with said cover to impart an outward pressure against the cover when the ring is contracted.

6. A device for removably clamping a cover on the open end of a metallic receptacle including a split locking ring having portions engaging the cover andthe receptacle to press the same together when the ring is contracted, lugs extending inwardly from the ends oi. the ring defining the split and means for contracting and/or expanding the ring including levers slidably carried by said lugs, one oi said levers having a slot i'ormed therein for slidably receiving a stud, a. stud on one of said lugs and operating in said slot, and toggle means pivotally connecting said levers, one of said levers having a portion for engagement with said cover to impart an outward pressure against the cover when the ring is contracted.

7. A device for removably clamping a cover on m the open end of a metallic receptacle including .3 a split locking ring having portions engaging the cover and the receptacle to press the same'together when the ring is contracted, lugs extending inwardly from the-ends of the ring defining the split and means for contracting and/or expanding the ring including levers slidably carried by each of said lugs and means cooperating with each of said levers for effecting contraction and/or expansion of said ring.

WILLIAM LOCKHAR'I'.

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