US2934231A - Closure for vacuum bottles - Google Patents

Description

April 26, 1960 c. BRAMMING 2,934,231

CLOSURE FOR VACUUM BOTTLES Filed Feb. 13. 1958 2 Sheets-Sheet 1 INVENTOR. Carl Drammmq ATTorneus April 1960 c. BRAMMING 2,934,231

CLOSURE FOR VACUUM BOTTLES Filed Feb. 13, 1958 2 Sheets-Sheet 2 m v 25 I i 24 INVENTOR.

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CLOSURE FOR VACUUM BOTTLES Carl Bramming, Nashville, Tenn., assignor to Aladdin Industries, Incorporated, Nashville, Tenn, a corporation of Illinois Application February 13, 1958, Serial No. 715,025

8 Claims. (Cl. 215-13) This invention relates to vacuum bottles or the like, and pertains particularly to closures o1- stoppers for vacuum bottles.

This application is a continuation in part of the copending application of Carl Bramming, Serial No. 626,037, filed December 3, 1956, and entitled Closures for Vacuum Bottles.

One object of the present invention is to provide a new and improved closure which will form a tight, doubly secure seal for the mouth of a vacuum bottle, despite minor variations in the size or conformation of the mouth.

A further object is to provide a new and improved closure which may easily be mounted on and removed 'from a vacuum bottle, and which will remain secured possibility of accidental vacuum in the vacuum bottle.

A further object is to provide a new and improved closure of the foregoing character which has a high heat insulating value, and thus will transmit very little heat either into or out of the vacuum bottle.

Another object is to provide a new and improved closure which is tasteless and odorless, so that the closure will not impart any flavor to the contents of the vacuum bottle.

'It is another object to provide a new and improved closure of the foregoing character which is extremely durable and serviceable, yet is easy to manufacture and Further objects and advantages of the present invention will appear from the following description, taken with the accompanying drawings, in which:

Fig. l is an elevational view of a vacuum bottle equipped with a new and improved closure to be described as an illustrative embodiment of the present in- Fig. 2 is a fragmentary enlarged elevational view showing the closure and the upper portionof the vacuum bottle, the view being partly in longitudinal section.

Fig. 3 is a fragmentary enlarged elevational view show- ,ing the upper portion of the vacuum bottle with the closure removed.

Fig. 4 is an elevational sectional view of an internally .threaded cap or mounting member constituting one elet It will be seen that Fig. 1 illustrates a vacuum bottle 11 which, in most respects, may be of any suitable or desired construction. The vacuum bottle 11 is equipped with aclosure 12 to be described as an illustrative embodiment of the invention. To some extent, the vacuum :bottle 11 is especially adapted or modified to receive theclosure 12, as will be explained in detail shortly.

2,934,231 Patented Apr. 26, 1960 In accordance with the usual practice, the vacuum bottle 11 comprises a vacuum insulated receptacle orfiller 13 having inner andouter walls 14 and 15 with an evacuatedspace 16 therebetween. The receptacle orfiller 13 is mounted within and surrounded by aprotective jacket 17. Thefiller 13 is usually made of thin glass and thus is quite fragile. Thejacket 17 may be made of a more durable material, such as metal, plastics or the like.

Thejacket 17 is usually constructed so that thefiller 13 may be removed. In this way, the filler may be replaced if it is broken. While thejacket 17 may be arranged in various ways, the illustrated jacket is formed with an upper portion in the form of acollar 18 which may be screwed into or otherwise disengagingly secured to a lower, generally cylindrical member or can 19. Abottom wall 20 is crimped or otherwise securely attached to thecan 19. Illustratedcollar 18 is formed withthreads 21 to receive the usual cup or cover (not shown).

In this case, the vacuum bottle is formed with anannular pouring lip 22 so that the contents of the bottle may be poured out very conveniently, Without any substantial dripping or spilling down the side of thejacket 17. In this instance, thepouring lip 22 is formed integrally with thecollar 18, at the upper end thereof. Illustratedcollar 18 is formed of metal, but it might be made of plastics or other suitable materials. It will be apparent that the illustratedpouring lip 22 is in the form of a double folded outwardly projecting rim. Immediately below thelip 22, on the outside of thecollar 18, is an annularundercutting groove 23. Thepouring lip 22 just outwardly from the bottom of thegroove 23 so that the lip will cleanly cut off the flow of liquid from the vacuum bottle when the bottle is returned to an upright position after a portion of the contents has been poured out. Below thegroove 23 is a generallycylindrical portion 24 of the collar. Thisportion 24 cooperates with theclosure 12, as will be explained in detail shortly.

The illustrated filler or vacuum insulatedreceptacle 13 has amouth 25 which is formed by the upper portion of theinner wall 14. Themouth 25 tapers downwardly in its internal diameter, in accordance with the usual arrangement. At the junction of the inner andouter walls 14 and 15,, thefiller 13 has a rounded upper edge orrim 26.

To facilitate the smooth fiow of liquids out of the vacuum bottle, thecollar 18 is formed with aflange 27 which extends inwardly and slopes downwardly toward theupper rim 26 of thefiller 13. Leakage of liquids between thefiller 13 and thecollar 18 is prevented by providing a gasket or sealingring 28 therebetween. It will be seen that thegasket 28 is shaped to be confined closely in the space defined by the rim portion 26v of the filler, theflange 27, thegroove 23, and the generally cylindricalupper portion 24 of thecollar 18. One or more sealing ridges oredges 29 are formedonthe gasket 28 to seat against theupper rim 26 of thefiller 13. It should be understood, however, that the illustrated arrangement of the pouring lip and the gasket is not essential to the present invention, but may be varied considerably.

The illustratedclosure 12 is advantageously formed in two parts, comprising astopper member 30 and a cap ormounting member 31. The illustratedstopper 30 is hollow, thin walled and generally cup shaped in form.

,It will be seen that the stopper St) has abottom Wall 32 which closes the lower end of an annular sidewall 3-3. Thesidewall 33 is open at its top end, but is closed b thecap 31. The illustratedstopper 30 is arranged to form a double seal with themouth 25 of thefiller 13. Near its upper end, thesidewall 33 is formed with a downwardly facing, downwardly tapering shoulder orseating portion 34 which is adapted to form the first or primary seal by seating against the .upper rim 26 of the,filler 13, as clearly shown in Fig. 2. To insure a perfect seal,stopper member 30 may be made of a soft resilient material, preferably polyethylene or some other tasteless, odorless, rubberlike plastic material. Synthetic or natural rubber or the like also may be employed, but polyethylene or the like is preferred because it is completely tasteless and odorless, and thus will not impart any flavor to the contents of the vacuum bottle.

Near its lower end, thestopper 30 is formed with askirtlike flange 35 which projects outwardly and downwardly from thesidewall 33, so as'to engage themouth 25 and thus form a second seal around. an annular area spaced downwardly from therim 26. Theflange 35 is flexible and resilient, and thus is flexed inwardly as thestopper 30 is pushed into the taperingmouth 25. When thestopper 30 is removed, theflange 35 springs outwardly, as indicated by the dotted line position shown in Fig. 2.

Between thetapered shoulder 34 and theflange 35, thesidewall 33 has an intermediate portion .36 which is reduced in diameter so as to be spaced inwardly from themouth 25 when thestopper 30 is in place. Thus, the reducedintermediate portion 36 defines an air space 37 between thestopper 30 and themouth 25. This air space has a high heat-insulating value. The thin walled construction of thestopper 30 also contributes to the high heat-insulating value of the stopper. It is preferred to fill thestopper 30 loosely with ground cork or other loose or soft insulatingmaterial 38, to improve the heat-insulating value of the stopper. However, the cup-shaped cavity within thestopper 30 may be left empty, in which case the air contained therein will provide .good insulation.

It will be seen that the illustrated cap or mountingportion 31 of theclosure 12 is formed with an upper,

generallyhorizontal wall 39, to which the upper end of thestopper 30 is connected. Thewall 39 closes the upper end of thestopper 30.

In this case, thestopper 30 is secured to thecap 31 by means of inner and outer dependingflanges 40 and 41 on the underside of theupper wall 39. As illustrated,

theinner flange 40 extends downwardly to a greater extent than theouter flange 41. As shown in Fig. 2, thestopper 30 has a generally cylindricalupper wall portion 42 adapted to fit snugly around theinner flange 41. Theouter flange 41 has an inwardly projecting lip or head 44, which is adapted to interlock with an outwardly projectingflange 45 at the upper end of thestopper 30. Because of the soft resilient nature of thestopper 30, theflange 45 may be snapped behind the lip 44.

A comparison of Figs. 6 and 2 will show that theflange 45 is flexed downwardly, from its free-state, generally horizontal position, when theflange 45 is forced past the bead 44, in the assembly of the closure. Between theflanges 40 and 41, theupper wall 39 of the cap has an angular, downwardly slopingundersurface 43, which fectly sealed against any accidental dislodgment of the closure. Thus, the illustratedcap 31 is formed with a skirtlike, generallycylindrical flange 46 which projects downwardly from the periphery of theupper wall 39. Interlocking thread elements or the like are formed on .theflange 46 and thejacket 17. In this case, as clearly shown in Figs. 3 and 4, =.the inside of theflange 46 is formed with segmental,multiple threads 47. Cooperative externalmultiple thread segments 48 are formed on thecylindrical portion 24 of thecollar 18.

Thus, theclosure 12 may be securely mounted on thecollar 18 by screwing theinternal threads 47 on to theexternal threads 48. Theclosure 12 is screwed down until the taperedshoulder 34 seats firmly against therim 26 of thetiller 13. A leak-proof seal is thus formed between thestopper 30 and thefiller 13. As thestopper 30 is pushed into themouth 25 of the filler, theflange 35 is flexed inwardly so that it will form a second seal with the mouth.

The arrangement of the closure is such that a perfect seal is provided despite minor variations in the size and conformation of themouth 25 of thetiller 13.threads 47 and 48 provide a considerable range of adjustment so that the taperedshoulder 34 may always be brought into firm engagement with therim 26 of the tiller. Moreover, the flexibleresilient flange 35 will compensate for a considerable range of variations in themouth 25.

Thethreads 47 and 48 hold theclosure 12 very securely on the vacuum bottle, against any accidental dislodgment, and against the action of any pressure that may develop in thefiller 13. If, on the other hand, a

partial vacuum develops in the filler, the pressure of the atmosphere will push thestopper 30 downwardly with increased force, so that the seal will be maintained perfeotly.

Theclosure 12 has an extremely high heat-insulating value because of various factors. The air space 37 between the sealingshoulder 34 and the sealingflange 35 provides a considerable insulating value. This is also true of the air space Within thestopper 30. If thestopper 30 is filled with insulating material, such as ground cork, the insulating value will be increased to an even greater extent. The thin wall of thestopper 30 also contributes to the insulating value, because the thinness of the wall minimizes conduction of heat along thewall. In addition, the plastic material normally employed in thestopper 30 has a low heat conductivity.

Thestopper 30 and thecap 31, constituting the two parts of the closure, may be easily molded of plastic materials at extremely low cost. Thecap 31 may be made of a relatively rigid, inexpensive plastic material, such as polystyrene. It is easy to add the ground cork to the stopper, if desired, and to snap the upper end of the stopper into the retaining elements on thecap 31. Thus, the enclosure may be easily made at low cost. Moreover, it is extremely durable and serviceable, and is easy to mount on and remove from the vacuum bottle.

Various modifications, alternative constructions and equivalents may be employed without departing from the true spirit and scope of the invention, as exemplified in the foregoing description and defined in the following claims:

I claim:

1. In a vacuum bottle, the combination comprising a vacuum insulated receptacle, a protective jacket mounted around said receptacle and having an upper portion surmounting a pouring lip, an annular gasket interposed between said upper portion and the upper end of said receptacle, said receptacle having an inner wall with an upper portion forming a downwardly tapering mouth for said receptacle, said receptacle having an annular upper edge extending around the upper end of said mouth, a closure disengageably receivable in said mouth of said receptacle, said closure comprising a hollow generally cup-shaped stopper member disengageably receivable in said mouth, said stopper member being made of soft resilient material, said stopper member having a side wall with a frusto-com'cal downwardly facing external seating portion near the upper end thereof and tapering The downwardly to a Substantial extent to seat against the upper edge of said receptacle in sealing engagement therewith, said stopper member having a generally frustoconical skirt-like flange projecting outwardly and downwardly therefrom near the lower end thereof for sealing engagement with said mouth of said receptacle along an annular area spaced downwardly to a substantial extent from the upper edge of said receptacle, said side wall of said receptacle having an intermediate portion of substantial length between said seating portion and said skirt-like flange, said intermediate portion being of reduced diameter with respect to said seating portion and said skirtlike flange and thereby being receivable in said mouth with an air space between said mouth and said intermediate portion to aflord heat insulation, said closure having a substantially rigid cap member disengageably receivable over said upper end of said jacket, said cap member having a generally horizontal upper wall with a downwardly extending skirt-like flange around its periphery, means securing the upper end of said stopper member to the underside of said generally horizontal wall on said cap member, said upper portion of said jacket having external thread means thereon, and internal thread means on the inside of said flange of said cap for cooperative engagement with said thread means on said upper portion of said jacket to screw said stopper member downwardly and thereby bring said seating portion into sealing engagement with the upper edge of said receptacle.

2. In a vacuum bottle, the combination comprising a vacuum insulated receptacle having a mouth therein with an upper edge extending around said mouth, a jacket mounted around said receptacle, a closure comprising a soft resilient generally cup-shaped stopper member disengageably receivable in said month, said stopper member having a downwardly facing downwardly tapering frustoconical shoulder near the upper end thereof for disengageably seating against the upper edge of said receptacle, said stopper member having a flexible resilient skirt-like flange near the lower end thereof for sealing engagement with said mouth at a point spaced substantially downwardly from said shoulder, said stopper member having an intermediate portion of substantial length between said shoulder and said skirt-like flange and of a reduced diameter with respect thereto to define an air space between said intermediate portion and said mouth so as to afford heat insulation, a substantially rigid cap portion on said closure for covering the upper ends of said jacket and said receptacle, said cap portion being connected to the upper end of said stopper member, and screw thread elements on said cap portion and the upper end of said jacket for retaining said stopper member in sealing position in said mouth.

3. In a closure for a vacuum bottle, the combination comprising a hollow thin walled generally cup-shaped stopper member made of soft resilient material, said stopper member having a downwardly facing downwardly tapering frusto-conical shoulder formed thereon near the upper end thereof to provide a first closure seal, said stopper member having a generally frusto-conical skirtlike flange flaring outwardly and downwardly thereon near the lower end thereof to form a second closure seal, said stopper member having an intermediate portion of substantial length between said shoulder and said flange and of a reduced diameter to form an insulating air space between said first and second seals, a substantially rigid cap portion on said closure and connected to the upper end of said stopper member, said cap portion having an upper wall with a downwardly extending flange thereon spaced outwardly from said stopper member, and internal screw thread elements on the inside of said downwardly extending flange of said cap portion.

4. In a vacuum bottle, the combination comprising a vacuum insulated receptacle having a mouth therein with an upper edge extending around said mouth, a jacket mounted around said receptacle, a closure comprising a soft resilient generally cup-shaped stopper disengageably receivable in said month, said stopper having a downwardly facing annular frusto-conical shoulder thereon for disengageably sealing against the upper edge of said receptacle to form an upper seal, said stopper having a flexible resilient annular generally frusto-conical flange flaring outwardly and downwardly thereon below said shoulder for sealing engagement with said mouth to form a lower seal, said stopper having a reduced intermediate portion of substantial length between said shoulder and said flange to define an insulating air space between said intermediate portion and said mouth, a mounting member on the upper end of said stopper, and interengageable mounting elements on said mounting member and said jacket for disengageably securing said stopper thereto insealing position.

5. In a closure for a vacuum bottle, the combination comprising a hollow thin walled generally cup-shaped stopper made of soft resilient material, said stopper having a downwardly facing, downwardly tapering frustoconical annular shoulder thereon to provide an upper closure seal, said stopper having a generally frusto-conical skirtlike annular flange flaring outwardly and down wardly thereon below said shoulder to form a lower closure seal, said stopper having a reduced intermediate portion of substantial length between said shoulder and said flange to form an insulating air space therebetween, a substantially rigid mounting cap having a top wall covering the upper end of said stopper and extending outwardly therefrom, interlocking flange elements on said top wall and the upper end of said stopper for positively securing said stopper to said cap, said cap having a downwardly extending flange thereon spaced outwardly from said stopper, and internal screw thread elements on the inside of said downwardly extending flange of said cap for disengageably securing said cap to the vacuum bottle.

6. In a closure for a vacuum bottle or the like, the combination comprising a hollow generally cup-shaped stopper made of soft resilient material, a cap having a hand grip portion with a substantially horizontal wall for closing the top of said stopper, said wall having a first depending annular flange thereon for snug reception within the upper end of said stopper, said stopper having an outwardly projecting continuous annular lip on the end thereof, said upper wall having a second depending continuous annular flange with an inwardly directed annular lip thereon for interlocking with said lip on said stopper to secure said cap to said sto'pper, said wall having an annular portion with an underside sloping upwardly and inwardly between said first and second flanges to retain said lip on said stopper in a downwardly flexed position in interlocking relation with said lip on said outer flange.

7. In a closure for a vacuum bottle or the like, the combination comprising a hollow generally cup-shaped stopper made of soft resilient material, an upper wall member for closing the top of said stopper, said upper wall member having first and second closely spaced depending annular flanges thereon, said first annular flange being disposed within said second annular flange and being of a diameter corresponding closely to the inside diameter of the upper end of said stopper for snug recep tion therein, said stopper having an outwardly projecting substantially horizontal annular lip on the upper end thereof, said second depending annular flange having an inwardly directed annular lip thereon for interlocking with said lip on said stopper to secure said upper wall member to said stopper, said upper wall member being made of a substantially more rigid material than said stopper, said outwardly projecting lip on said stopper being substantially greater in outside diameter than the inside diameter of said inwardly directed annular lip on said second flange but being adapted to be forced up,

wardly past said inwardly directed lip, said lip on said stopper being adapted to be flexed downwardly as it passes said lip on said second flange, the inside diameter of said second flange above said lip thereon being slightly less than the outside diameter of said lip on said stopper for maintaining said last-mentioned lip in a partially downwardly flexed condition and thereby affording strong resistance to separation of said sto'pper from said upper wall member, said upper wall member having an annular portion sloping upwardly between said second and first flanges at the upper end of the space therebetween to afford room for movement of said stopper into said space through a sufiicient distance to move said outwardly projecting lip on said stopper past said inwardly directed lip on said upper wall member, while assisting in maintaining said outwardly projecting lip in its partially downwardly flexed condition.

8. In a closure for a vacuum bottle or the like, the combination comprising a hollow generally cup-shaped stopper made of soft resilient material, an upper wall member for closing the top of said stopper, said upper wall member having a peripheral hand grip portion projecting outwardly beyond said stopper, said upper wall member having first and second closely spaced depending annular flanges thereon, said first annular flange being disposed within said second annular flange and being of a diameter corresponding closely to the inside diameter of the upper end of said stopper for snug reception therein, said stopper having an outwardly projecting substantially horizontal annular lip on the upper end thereof, 30

said second depending annular flange having an inwardly directed annular lip thereon for interlocking with said lip on said stopper to secure said upper wall member to said stopper, said upper wall member being made of a substantially more rigid material than said stopper, said outwardly projecting lip on said stopper being substantially greater in outside diameter than the inside diamter of said inwardly directed annular lip on said flange but being adapted to be forced upwardly past said inwardly directed lip, said lip on said stopper being adapted to be flexed downwardly as it passes said lip on said second flange, the inside diameter of said second flange above said lip thereon being slightly less than the outside diameter of said lip on said stopper for maintaining said last-mentioned lip in a partially downwardly flexed condition and thereby affording strong resistance to separation of said stopper from said upper wall member, said upper wall member having an annular portion sloping upwardly between said second and first flanges at the upper end of the space therebetween to afford room for movement of said stopper into said space through a sufiieient distance to move said outwardly projecting lip on said stopper past said inwardly directed lip on said upper wall member, while assisting in maintaining said outwardly projecting lip in its partially downwardly flexed condition.

References Cited in the file of this patent UNITED STATES PATENTS 2,265,615 Stalter Dec. 9, 1941 2,670,869 Martin Mar. 2, 1954 2,830,722 Darmstadt Apr. 15, 1958 FOREIGN PATENTS 64,824 France July 6, 1955 764,771 Great Britain Ian. 2, 1957

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