DE1816448A1 - Thermos - Google Patents

Description

The invention relates to thermoses, one of vacuum-insulated double-walled, surrounded by a protective jacket Have use.

is particularly advantageous for thermos flasks whose protective jacket is made of resinous plastic material is ο ''

The protective jacket of such thermoses is mostly provided with a removable lock, so that the vacuum-insulated Insert can be removed and replaced * In this way, a new vacuum-insulated insert can be inserted if the original mission is broken as a result of damage.

Accordingly, the present invention relates to a Thermos flask consisting of a vacuum-insulated insert, a protective jacket arranged around it with means to grasp and hold the upper end of this insert and one on the "underside of the protective jacket 'Detachably attached floor spars for grasping' and holding ^^ l ^ saf ^ ln & es consists · With known designs Such thermoses is a Sohraubgawind connection

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between the bottom spine and the lower end of the mantle intended. There are external threads on the lower end of the jacket. The Bodenversohluß has a ring-shaped side wall with internal threads »between the jacket and the ring-shaped side wall of the bottom closure a sealing ring is sometimes provided. The sealing ring serves to submerge the thermos bottle to be able to so that it can be immersed in washing water, taking care that no water in the space between the vacuum-insulated insert and the Protective sheath can penetrate »

Although these known embodiments are satisfactory under normal conditions, difficulties arise as soon as the bottom seal is screwed tightly onto the protective jacket _o Tightening the bottom seal leads to an outward expansion of the upper end of the bottom seal. This outward expansion in turn leads to a reduction in the effectiveness of the sealing ring, so that it no longer results in a liquid-tight connection. . ? / The outward extension of the side wall of the bottom fastener protrudes beyond the protective jacket, which looks unsightly »In addition, the outwardly protruding wall of the floor fastener leads to damage to clothing and the like»

The present invention has for its object to provide a thermos flask with a jacket and one on the jacket screwed on or detachable there in some other way to create attached, improved bottom closure, at avoiding any outward expansion of the side wall of the bottom cover and the connection between The bottom seal and jacket are sealed against the ingress of barrels »

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This object is achieved according to the invention in that the Protective jacket and the bottom closure ring-shaped wall sections with matching butt-conical conical surfaces have which the annular wall portion of the bottom closure against outward expansion movements hold on

The arrangement is expediently such that the frustoconical conical surfaces are in sealing engagement and a tight seal between protective jacket and bottom seal form o

The frustoconical conical surface of the floor seal is preferably outwards and the frustoconical conical surface of the protective jacket directed inwards accordingly «

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The angle between a frustoconical conical surface and the axis of the thermos flask is preferably smaller than the angle between the other frustoconical conical surface and ί of the axis, so that the contact surface between the frustoconical conical surfaces is limited »In this way, the sealing pressure between the frustoconical conical surfaces is increased That a liquid-tight seal is achieved. To provide additional protection that the connection remains liquid-tight, a small amount of a sealant can be used between the frustoconical conical surfaces. Such a sealant may be gewöhnlichaaParaffin or _o Vaseline or even a more recent findings ^ appropriate gasket material such as silicone oil or ZOB _B rSLlikonfett *

In an advantageously modified further embodiment, the arrangement is made such that the abutting one another Wall sections of the jacket and the bottom closure

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are provided with a cross-sectionally V-shaped ring elevation and a matching V-shaped ring groove. The frustoconical annular fconusflachen are formed on this survey and in this hat is preferably arranged at the elevation Iodenversehluß while the Hu ± located in the jacket, however, * ^ iQ arrangement can be reversed. The angle enclosed by the elevation is preferably made somewhat smaller than the angle enclosed by the annular groove. This leads to a spatially limited, tight fit between the elevation and the annular groove, so that a tight seal is ensured between them

Further features and advantages of the invention will be based on of exemplary embodiments illustrated in the drawings

Figo 1 shows a thermos bottle according to the invention in Front view, partly cut lengthways,

2 shows an enlarged partial section from the left side Part of Fig. 1, which shows the connection between the jacket and the bottom closure,

Figo 3 shows a modified thermos bottle, which as a further Embodiment according to the invention is described below, in elevation,

FIG. 4 shows a longitudinal section through part of the thermos bottle according to FIG. 3,

Figo 5 in partial longitudinal section enlarges a Τ.θά, Ι the. ·., .. Connection between the jacket and the bottom seal, whereby these are partially released,

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Fig. 6 partial section corresponding to that of Figo 5 wherein however, the jacket and bottom lock fully interlock,

Fig. 7 is a partial longitudinal section showing the details of the connection between the jacket and the insert for the thermos bottle, with these parts partially detached from each other,

FIG. 8 shows a section similar to that of FIG. 7, but with the parts fully interlock "

Fig «1 and 2 show a thermos bottle 1, which is a common double-walled vacuum-insulated vessel "or one Has insert 2. The insert 2 is usually made of glass and is therefore very fragile. He owns indoor and Outer walls 3 and 4, with an evacuated space 5 in between ο The upper ends of the inner and outer walls 3 and 4 are connected to one another by a curved edge zone 6 The insert 2 has an opening 7 'through which liquids are filled into the insert 6 or poured out of it be o

As shown in the drawing, the lower end of the outer wall 4 is provided with a tubular extension 8 _; provided, which represents the closed remainder of the pipe through which the space 5 was evacuated. It can consist of synthetic resin material, of metal or of another suitable material.

The thermos bottle 1 is provided with a protective jacket 10 which surrounds the fragile insert 2 and protects the

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Sheath 10 shown consists of resinous plastic material, however, other materials can also be used, ο

As shown, the jacket 1 0 has an approximately cylindrical. Shape. Towards the top it is slightly tapered, which means: the production of the jacket from the resinous plastic material by injection molding or the like is facilitated will ο

In the vicinity of the upper end 10, the jacket has a slightly tapered portion 11 is formed such that it aufnimmto a drinking cup 12 in an inverted position, the cup 12 is preferably made of synthetic resin, but may be also made of other suitable material ₀ Cup 12 can, when not in use, be attached to the upper end of the shell 10 _o On the shell 10 and on the cup 12 are preferably matched threads 13 and 14 for detachable connection of the cup on the shell. The threads 13 are on dam tapered section 11 of the jacket 1O ₀ . !

Above the tapered section 11, the jacket 10 tapers further and merges into the neck area 15 via «Auf dem Appropriate devices are provided in the neck 15 in order to retain the insert 2 in the jacket. The illustrated HaIsbereioh 15 is therefore provided with an inwardly projecting annular flange 16 which extends over the curved upper end section! 6 of the insert 2 overlaps <, a soft, resilient sealing ring or an insert seal 17 is shown inserted between the flange 16 and the insert 2. The sealing ring 17 prevents any passage of liquid between the upper end of the insert 2 and the jacket 10 »

To the liquid-diohten conclusion of the insert 2 is in its Opening 7 a plug 18 is provided »The one shown

909838 / 0U2 ~ * ~

I & Stopfaa 'is'ausge'bildet that * ^ r ^- on the Hälsteil 15 of the sheath removably 1Ö "befW ^ IGT values Mim.'Hierzu is the plug 16 ffiif a retaining ring 19 is provided, consisting of: eisest naeit auien directed flange 20 and a planned target 21 according to "geriohteten" exists. In the shape of the tongue shown, on the shark area 15 and the flange ¹ 21 matching threads 22 and 23 are provided for the detachable ferbindig des ^: Stopfejis 18 on the jacket 10 »* ·

The plug Ϊ8 shown is hollow and thus has an interior space 24 o The upper end of the interior space 24 is closed by a disk 25. Of the Interior 24 can, if desired, with 'Isolationsmatariali how ZoB * can be filled with ground cork.

A pouring nose jumps from the flange Ί.6 on the jacket 10 upwards before and widens outwards »The pouring nose 26 makes it easier to pour liquids out of the Thermos flask by preventing the liquids from running down the side of the jacket 10. '

In order to enclose the insert 2 in the jacket 10 and to hold it in place, it is "secured by a bottom lock" 2? closed. -The illustrated Bodenverschiuß'27 is generally cup-shaped and thus has ■ a -bodenweathers 28 and an annular side wall ^; 29 '^; On the bottom wall 28 are means for supports and? 'i ^ thäifcen'de's ° insert 2 provided. As shown in the drawing, -is between the bottom wall 28 and the E ^ sä ^; ta->2'-egg _rre soft 'elastic sleeve''30' ^ introduced; _β The-Hülge? · '^ Ö'is-t' · um = the protective cap 9 is pushed on tightly. From the memory is; it can be seen that dii ^ Hulse 30'in an approximately cylindrical base 32-. j.

909838/01

SAO ORIGINAt

leads and is fixed therein, with this base protruding upward from the _{bottom wall 28 o} On the sleeve-shaped base 32 elongated reinforcing rings 33 are formed, which serve to grasp and support the sleeve 30. The sleeve 30 is preferably made of natural or synthetic rubber. The sleeve provides a firm but elastic support for the fragile insert 2 ο

The jacket 10 and the bottom closure 27 have adjacent lateral annular wall sections 34 and 35, which are detachably connected to each other »As can be seen particularly from Figo 2, the outside of the lower side wall section 34 of the jacket 10 engages over the upper lateral land section 35 of the bottom closure 27 <> To produce a detachable connection between the bottom cover 27 and the jacket 10, appropriate devices are provided. In the embodiment shown, this device consists of interacting threads 36 and 37 on the wall sections 34 and 35. The threads 36 shown on the jacket 10 are raised, while the threads 37 on the bottom closure part 27 are designed as depressions equivalent other elements, such as Z ₀ B _{0, can be} replaced by bayonet locks.

Also in accordance with the present invention are devices provided for an extension or expansion of the lateral wall section 35 at the bottom closure 27 prevent the screwing of the threads 36 and 37 can be caused. The embodiment shown in the drawing of an inventive Thermos bottle is for this purpose with an annular frustoconical conical surface 38 at the upper end of the lateral Wall absohnittes 35 equipped with floor support 27]

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~ ic

Bine Mermiii cooperating annular frustoconical Conical surface 39 is located on the side wall part 34 of the shell 10-. The frustoconical cone surface 38 on the Bottom closure 27 is directed upwards and outwards, while the Konusfläohe 39 on the jacket 10 downwards and naoh is directed inwards. The drawing shows that the conical surface 39 is formed on the underside of a flange 40 is that protrudes from the lateral wall section 34. The plan 40 closes essentially flush with the Outside of the Seitenwandabsohnittes 35 from Bodenversohluß away",

When the bottom lock 27 is screwed onto the jacket, the frustoconical conical surface 38 is pressed firmly against the frustoconical conical surface 39. The inclination of the conical surfaces 38 and 39 creates a clamping effect, either outward expansion of the side wall section 35 prevented.

The mutual engagement of the conical surfaces 38 and 39 results a tight seal that allows water to pass through through the connection between jacket 10 and bottom lock 27_ prevent. To improve the effectiveness of this policy closure the conical surfaces 38 and 39 are preferably with slightly inclined at different angles. In this case, the angle between the conical surface 38 is preferably on the bottom joint 27 and the axis of the thermos flask is slightly smaller than that Angle between the conical surface 39 and this Aohsa. In one baispialswaisan execution is the angle between the Conical surface 38 and the Aohse 60 °, while the angle between dar cone surface 39 and dar Aohsa 68 ° is »The cone surface 38 on the B-odanvarsohluß 27 is therefore preferably so hard raised or angled as the conical surface 39 on d «m Coat 10. Duron this training will be dei? mutual singing riff the cone surfaces 38 and 39 near the tlmienseite dea

INSPECTED

Side wall section 35 is too spatially limited. Corresponding the spatial delimitation of the intervention is between the Cone surface 38 and 39 developed a larger Mchtungsdruek, when the threads 36 and 37 are firmly tightened «Corresponding» a tight seal between surfaces 38 and 39 is more easily achieved »

From the drawing it can be seen that the side wall Sohnitt 35 of the floor closure 27 at its upper end into an annular elevation 41 with a V-shaped cross section expires β The elevation 41 is created by the intersection of the conical surface 38 with the inner surface 42 of the Seitenwandabschnitr-i tes 35 ο The inner surface 42 is essentially cylindrical and only slightly tapered to allow the bottom closure to be made of resinous plastic. to lighten the material by injection molding or the like

The V-shaped elevation 41 is designed in such a way that it is provided with a V-shaped annular groove 43 on the protective jacket 1 0 fits together * The V-shaped groove 43 results from the intersection of the conical surface 39 with the outer surface 44 of the rare wall section 34 ο The sealing engagement between the floor sponge 27 and the protective jacket 10 is through the T-shaped Elevation 41 fixed locally.

IM to achieve that a perfectly tight seal between the Bodenversohluß 27 and the coat 1 0 with greater security is formed, it is expedient to place a small amount of sealing compound between the elevation 41 and the hat to be attached «For example, a thin Layer of Parsffin or * Vaseline can be applied. Instead of of paraffin, however, may also correspond to recent findings Sealants are used, such as silicone oil or silicone grease · There is only a very small amount of each Amount of sealant required so that its presence

909838- / 0142--

1816443

~ 11 -

this is usually not the case for the user of the thermos flask becomes apparent »As a result of the sealing between the Conical surfaces 58 and 59, it is possible to use the thermos bottle 1 can be cleaned by immersion in rinse water without any substantial risk of water ingress into the room between the insert 2 and the jacket 10. The immersion barice it of the thermos flask makes it much easier to clean «

The bottom closure 27 only needs to be removed if the insert 2 is broken as a result of damage. The bottom closure 27 is then unscrewed from the jacket 10 so that a new insert 2 can be inserted into the jacket. The bottom closure 27 is then screwed onto the casing 10 until the frustoconical conical surface 58 fits tightly against the frustoconical conical surface 59. The sealing fit is spatially limited to the vicinity of the V-shaped cross-section having elevation 41 "so that a tight seal is easily achieved." The blocking engagement between the elevation 41 and the annular groove 45 prevents any outward expansion of the upper side wall section 55 on the bottom closure The side wall section 55 thus remains flush with the puddle 40 _o There is also no unsightly bulging or widening of the side wall section 55 at the bottom closure 27.

The Mg * 5-8 show a further embodiment of the invention based on a modified thermos flask 45. The thermos flask 45 belongs to the so-called "whitehals" type with a correspondingly wide opening o It contains a vacuum-insulated insert 46 with a wide opening 47 _o The insert 46 is like a pot, since the opening 47 has no neck and is just as wide as the main part of the insert 46. Otherwise, the insert 46 is similar to the insert 2. It has inner and outer walls 48 and 49, one

909838/0142

rounded upper edge 50, a tubular extension 51 a protective cap 52, similar to the corresponding parts of: insert 2

The frangible insert 46 is surrounded by a protective jacket, preferably of a suitable synthetic resin material from f is made "Such suitable materials are ι such as polyethylene, polypropylene and polystyrene," I can of course also other materials used [be. ^r

The jacket 53 is also substantially cylindrical and; slightly conical to facilitate production by injection molding or the like. In the vicinity of its upper end, the protective jacket 53 has a tapered section 54 which is designed to receive a drinking cup 55 similar to the cup 12 ”. On the tapered portion 54 and the cup 55 mutually corresponding threads 56 and 57 are preferably for releasable attachment of the cup ι provided on the casing *!

The thermal vessel 45 differs from the thermos bottle 1 in that it has a protective liner 58 having the inner wall 48 of the insert 46 überzteht · The liner 58 prevents the breakage or damage to the insert 46 · wide-mouthed inserts, Z ₀ B, as a result inserting spoons and other hard objects into the insert. The use is particularly vulnerable to breakage «Thermos vessels of this type are particularly useful for keeping food hot or cold which is eaten directly from the thermos vessel«. The insert 48 enables spoons or other devices to be inserted without the risk of the insert 46 being broken or scratched in the process. Every small scratch usually leads to breakage of the insert «The insert

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5 © allows also the use of ice to verwanden, IAEI-e "would cause the use of _β The liner 58 is preferably made of resinous ELastikwerkstoff, but it can AUOH be made of other resistant materials produced" .gewöhnlich in the absence of a deposit a fraction to Suitable plastic materials include, for example, polyethylene, polypropylene, i23il polystyrene.

In the vicinity of its upper end, the seat 58 shown has a shoulder 59 which is directed towards iantem, on which the curved upper edge 5 © of the insert 46 rests. The one-suit 58 has an extended Befestigungsabsohnitt 60, ider upwardly over the insert 46 protruded The fixing portion 60 JaaJEnahme is ssut einge- a stopper 61: rf_elitet _e Torzugsweise are maac on BeXestigungsabschnitt 60 means JJisbaren connection of the plug 61 shown vorgesneno How are ZOB. on the fastening section 60 and on the plug 61, thread turns 62 and 63 separate from one another.

The fastening section widens at its upper end £ 0 upwards and outwards from bucket pouring nose 64, which on the © foeren the outer end of the! Tam an outwardly protruding ch 65 owns

the upper Emüem ü & r protective sheath 53 and the liner, a sealing TTeartoiESteag 'is provided to fluids Msrnm zwisohen the HIs Nmae the insert keep 46th oiasMldTung a Ymiritofcwlmng at this point allows idle WSlHb 53 Tiaiiä al © Eämlaga 58 from two different

3ie3? G®s1t®ll-i can be.

1816U8

The insert 58 ordered in the Hegel from a plastic material, that is faintly colored or translucent. In contrast, a darker one is preferably used for the jacket 53 colored, plastic material used «, j

In the embodiment shown, the upper fastening section 60 for the insert 58 is equipped with a cylindrical outer surface 66 which is tapered in an upper; End section 67 of the jacket 53 is located »The outwardly projecting flange 65 protrudes beyond the upper end of the tapered section 67ο On the outwardly projecting flange 65 a downwardly directed annular projection or projection 68 is preferably provided. The flange 68 shown tapers SiOH down and fits ₀ forms the groove 69 into a Hingnut 69, which is formed at the upper end of the jacket 53 has a cone corresponds approximately to the cone of the flange 68th formation of the Hingnut 69 on the upper end of the tapered Absohnittes 67 forming inner and outer upwardly directed flanges 70 and 71 to the constricting gegenüberlie- ■ sides of the groove. the inner flange 70 is formed so that it in an annular groove 72 paJ3i. located at the

68
Insert 58 is located between the flange and the cylindrical outer surface 66 "

The connection between the jacket 53 and the insert 58 is preferably produced by "friction welding" so that the connection is mechanically strong and liquid-proof. "Friction ^{welding 11} is a special kind of heat welding, in which the heat between the iPXastic parts is generated by friction. One part is rotated relative to the other while the parts are pressed together. If necessary, both files can also be rotated in opposite directions. The rotational movement between the parts develops sufficient heat to generate friction

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to soften the parts at a welding temperature. Split becomes complete when the joint cools down «. In the illustrated embodiment, the inner flange 70 on the dumbbell 53 is higher than the outer flange 71 and also higher than the flange 68 on the insert 58. The largest This creates friction between the upper end of the flange 70 and the annular groove 72 in the insert. The resulting frictional heat softens the flange 70, so that plastic material flows from the flange 70 into the groove 72 and further into the groove 69, thus ensuring that a firm welded joint is formed. After a sufficient rotary motion to produce the necessary heat, the rotational movement is stopped, so that the joint is cooled, and the weld is completely _o A final compound is particularly illustrated in Figo 8 It is found that the material from the flange 70, the upper edge of the hat 72 has filled and that the height of the flange 70 has been reduced by displacement of the softened plastic material, so that all flanges 67, 70 and 71 have the same height. In addition, the flange 68 sits firmly in the groove 69 and is welded therein.

Although the compound \ produced by "friction welding" is particularly advantageous for the connection between the sheath 53 and the liner 58, for example, "through" lösungsmitWl-welding "or by use of adhesive can also be in any other manner, are manufactured ,,

The thermos flask 45 according to FIGS. 4-8 has a bottom closure 73 which is similar to the closure 27 of FIG.

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borrowed, is ο The closure 73 is thus preferably made of a; Resin-like plastic material produced and designed with a bottom wall 74 and an annular side wall 75 | Equip «Between the floor wall 74 and a protective cap 52 of the insert 46, support means are provided. As in the previous example, a soft elastic sleeve _: 75 is arranged around the protective cap 52 »The upper end of the sleeve rests against the edge 76 of the protective cap. A base part 77 for receiving and supporting the lower part of the elastic sleeve 75 is provided on the bottom wall 74.

The bottom closure 73 has an upper annular wall portion 78 which comprises an annular wall section 79 of the jacket 53 for the detachable connection of the bottom closure 73 corresponding means are provided with the jacket 53. These preferably consist of mutually corresponding threads 80 and 81 of the adjacent wall sections 78 and 79 o

Means are provided on the jacket 53 and the bottom closure 73, an outward stretching of the upper; To prevent sidewall portion 78 of bottom closure 73, when the threads 80 and 81 are tightened In this embodiment of the invention, these means preferably have the shape of a V-shaped cross-section having an annular elevation or ring strip 82 and an annular groove 83 with a V-shaped cross-section. The elements 82; and 83 can interlock and thus judge one outward. prevent any stretching or expansion of the bottom closure 73, when it is screwed tightly onto the jacket 53. The elements 82 and 83 can also be positioned between the side wall sections th 78 and 79 on the bottom shutter 73 and the jacket 53 interchanged »However, it is preferred that the elevation, which is V-shaped in cross-section, or the wedge 82 on the upper end of .Seiten ^ section 78 of bottom closure 73

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to be provided, while the V-shaped groove 83 is preferably on. ■ the jacket 53 is formed. As shown, the V-shaped groove 83 is on a downwardly directed edge ... . ^: 84 on the lateral wall section 79 of the jacket above the., Threads 81., ■ '

The V-shaped elevation 82 and the V-shaped groove 83 are with frustoconical conical surfaces, which in the same way, like ... the blunt, gel-like conical surfaces 38 and 39 of the thermos flask 1 work. The. V-shaped elevation 82 thus has. ^ an outwardly facing frustoconical conical surface 85, the / inwardly directed frustoconical conical surface 86 of V-shaped groove 83 can create. The FJLächan 85 and 86 gave, ™ aina. Clamping effect that causes the side wall sections to expand. , 78 at the Bodan lock 73 to the outside

In addition to preventing the expansion of the lateral wall section 78, the V-shaped elevation 82 and the V-shaped groove 83 form a tight seal and thus prevent water from penetrating into the space within the jacket 53. For a particularly light and particularly effective seal To achieve, the included angle of the 'V-shaped elevation 82 is preferably smaller than the angle included by the V-shaped' groove, so that the surface of engagement between the elevation and the groove spatially on the upper end of the t

Elevation is limited. The spatially limited Anainandarliagan increases the sealing pressure between the elevation and the groove when the floor varachle 73 is screwed tightly onto the jacket 53 is. In one embodiment, the included angle of the elevation 82 is 80 °, while the closed-isane The angle of the groove 93 is 90 °. These dimensions are in Pig .. 5 shown, but it is clear that these angles can be selected within a wide range,

The height of the V-shaped elevation or ring ridge 82 is preferably somewhat greater than the depth of the V-shaped groove 83,

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so that the elevation penetrates for engagement in the uppermost end of the groove when the Bodenversohluß is screwed on the _(Mantel 53 73rd In one embodiment, the height of the V-shaped projection is 82 ZOB ₀ about 0.635 mm (0.025 inch), · · ■ · 'while the depth of the groove 83 is about 0.508 mm (0.020 inch) »These proportions are shown in Fig 82 is pressed into the slot 83, a small gap remains between the edge 84 ^: the jacket 53 and the upper end surface of the bottom closure ->'.-■' ses 73o This gap is, for example, "as" shown in FIG. 6 about 0.127 mm (0.005 inch), but this dimension can also be unchanged over a larger range . If the threads 80 and 81 are firmly tightened, the gap ensures a good seal due to the compression of the elevation 82

Again, a small amount of elevation 82 and the groove 83 be provided a sealant between 'to easily get a perfect seal conclusion "this purpose can be used all conventional sealants, such as" B. small amounts of paraffin or petroleum jelly or silicone oil or grease.

Various other modified, alternative or equivalent embodiments may be used the subject matter and the general idea of the invention are abandoned »

; The invention also includes all partial and sub-combinations the features described and / or shown »

- Claims - 909838 / 0U2

Claims (1)

Expectations Bi - 1ο thermos flask, consisting of a vacuum-insulated insert, a protective jacket arranged around it with means for grasping and holding the upper end of the insert and a bottom closure releasably attached to the underside of the protective jacket for grasping and holding the lower end of the insert, characterized in that the protective jacket (10) and the bottom seal (27) have ring-shaped wall sections (34,35,78,79) resting against one another with mutually matching frustoconical conical surfaces (38,39,85,86) which form the ring-shaped wall section (35,78) of the bottom seal ( 27 »73) hold outward expansion movements in relation to I. 2Ό thermos bottle according to claim 1, characterized in that the frustoconical conical surfaces (38, 39) abut one another in a sealing manner and form a tight seal between the jacket (10) and the bottom closure (27). that 3ο thermos bottle according to claim 1-, characterized in that the frustoconical conical surface (39) on the bottom closure (27) is directed outwards, the frustoconical conical surface (38) on the jacket "(10) is directed inwards, _o 4ο Thermos flask according to claim 3, characterized in 'that the frusto-conical cone surface (39) on the bottom closure (27) at a more acute, angle to the axis of the vacuum bottle runs than the frustoconical _cone: surface (38) on the casing (10), whereby the sealing effect between the frustoconical conical surfaces (38,39) is increased I O -2- 90 983BV _x Q ₁ U2 _: .?;. '■■ - 5o Thermos flask according to claim 1, characterized in that d ate the abutting annular wall portions (78,79) has an annular protuberance (82) with V-profile on the one of these fandabsGhnitte ^l and sine annularly? lut (83) ', with a V-profile on the other of these wall sections and that frustoconical conical surfaces (85 »86) through the ring; shaped elevation (.82) and the Hingnut (83) with "MrQfil; are formed» 6, thermos bottle according to claim 5 » characterized in that the angle enclosed by the V-profile of the annular elevation (82) is smaller than the included angle of the V-profile of the annular groove (83), whereby the V-shaped annular elevation ( 82) rests on the V-shaped ring groove (83) on a limited contact line » 7ο Thermos bottle according to claim 6, characterized in that the V-shaped ring elevation (82) on the bottom closure (73) and the V-shaped ring groove (83) are arranged on the jacket. 8o thermos bottle according to claim 1, characterized in that ^! that it is made of plastic material and has an insert (58), preferably made of synthetic resin, lining the vacuum-insulated insert (46), that the insert (58): an upper end section (60) with an annular flange projecting outwards and downwards ( 65,68) and that the jacket (53) has an upper end portion (67) with an upwardly directed annular groove (69) for receiving the flange (68) and that the flange (68) with the upper end portion (67) of the shell (53) preferably by welding, by friction welding is ₀ ■ 909838 / 0U2 Blank page