WO2019018896A1

WO2019018896A1 - Portable insulated liquid storage and dispensing device

Info

Publication number: WO2019018896A1
Application number: PCT/AU2018/050779
Authority: WO
Inventors: Adam William HUTS
Original assignee: Huts Adam William
Priority date: 2017-07-28
Filing date: 2018-07-27
Publication date: 2019-01-31
Also published as: TW201910229A

Abstract

A liquid storage and dispensing device having an insulated vessel supported within a support structure in an orientation where the vessel opening is lowermost for dispensing liquid and dispensing structure including a cap configured to engage with the opening to provide a liquid tight seal between the opening and cap, the cap being configured to support an air inlet assembly and an outlet assembly whereby liquid can be dispensed from the vessel, and the inlet assembly including a valve to allow air into vessel during dispensing of liquid via the outlet.

Description

PORTABLE INSULATED LIQUID STORAGE AND DISPENSING DEVICE

Technical Field The technical field of the invention is liquid storage and dispensing devices that are insulated to reduce

temperature changes in the stored liquid. Applications for such devices can include any circumstance where heated or cooled liquids may be needed or desired, for example picnics, camping, boating, catering, worksites, sports fields, etc.

Background Vessels for storing and transporting heated or cooled beverages are well known. A popular style of vessel is a vacuum flask, having a double walled flask with a partial vacuum sealed between the two walls to reduce heat exchange between the inside and outside of the flask.

However, other forms of insulation are also used, such as plastic and foam insulation.

Domestically such vessels are commonly used for carrying beverages, such as hot coffee or cooled drinks. These containers are typically sized for easy carrying and have a single opening in the top, which can be sealed with an insulated liquid tight cap. The flask is filled via the opening and then poured out for use. For vacuum flasks typically most heat loss is around the opening. This is due to heat loss where the double walls are joined, and also through less effective insulation of the cap.

For larger volume use, such as catering, vessels are typically too large to hold for pouring to dispense liquids . For such applications either a dispensing tap or faucet can be provided in a lower part of the vessel.

These devices utilise gravity for dispensing liquid via the tap and for the liquid to flow smoothly require venting in the upper part of the vessel to allow air into the vessel as the liquid is dispensed. Such vessels also typically have a removable lid to enable easy filling. One problem with such vessels, particularly for use with hot liquids is that heat is lost though the top vent.

Further, vacuum insulation is made less effective by additional openings, so less efficient and bulkier foam type insulation is typically used.

Alternatively, vessels may have a pumping mechanism in the cap to enable liquid to be drawn from the vessel and dispensed through a spout in the cap. This type of arrangement is often used for vacuum insulated vessels. However, significant heat loss can occur through the pumping mechanism and cap.

Some vessels for catering type use solve the problem of heat loss by having heating elements to heat or maintain heat of the liquid. However, this requires power to be available and may limit the use of such vessels.

There is a need for alternative liquid storage and dispensing devices, particularly for use with heated liquids.

Summary of the Invention

According to a first aspect there is provided a liquid storage and dispensing device comprising:

an insulated vessel having an opening, and a support structure arranged to support the vessel in an orientation where the opening is in lower portion of the vessel for dispensing liquid from the vessel; and

a dispensing structure comprising a cap configured to engage with the opening to provide a liquid tight seal between the opening and cap, the cap being configured to support an air inlet assembly and an outlet assembly whereby liquid can be dispensed from the vessel, and the inlet assembly including a first valve to allow air into vessel during dispensing of liquid via the outlet.

In some embodiments the first valve of the inlet assembly is operable in response to reduction in pressure within the vessel, caused by dispensing of liquid via the outlet. The inlet assembly can include a stand pipe to extend through the fluid in the vessel to the top of the vessel such that when oriented with the opening in the lower portion of the vessel air from the inlet is delivered via the stand pipe to the top of the vessel interior. In an embodiment the first valve is located on the stand pipe at an end a distal from the cap. In another embodiment the first valve is located at the end of the stand pipe proximal the cap. In another embodiment the inlet assembly further comprises a second valve configured to allow air to out of the vessel via the inlet, the second valve being located proximate the first valve on the stand pipe. In another embodiment the stand pipe includes a third valve to inhibit entry of liquid to the stand pipe during submersion .

In some embodiments the outlet also includes a valve to prevent leaking.

The outlet assembly can be configured for connection to an outlet fixture. The outlet fixture can be removable.

In an example the outlet fixture comprises a faucet or tap . In another example the outlet fixture comprises a shower head .

In some embodiments the outlet can be configured to allow filling of the vessel via the outlet.

In some embodiments the cap is removable. For example, the cap can be removed for filling or cleaning the vessel. In some embodiments the support structure is further arranged to allow the vessel to be supported in an orientation where the opening in an upper position for filling of the vessel. In some embodiments the support structure comprises a vessel housing allowing the vessel to be rotated from an upright to an inverted orientation.

In some alternative embodiments the support structure is incorporated into the cap.

An embodiment of the liquid storage and dispensing device further comprises a pressuring mechanism, to create positive pressure in the vessel. In an example the pressuring system is a manually operated air pump.

In some embodiments the insulated vessel uses vacuum insulation . In some embodiments with a removable cap, the cap and vessel opening have cooperating screw threads and the cap is unscrewed for removal. The cap and a base of the support structure can be connected to unscrew as a single component. Some embodiments include a collar snap fitted to the neck of the vessel and shaped to act as a funnel to the opening. The collar can be insulated. In some embodiments the support structure includes a top assembly having a substantially flat top portion wherein the device can be supported on the top portion with the vessel in an orientation where the opening is in an upper position for filling of the vessel. The top assembly can include a handle. The top assembly can include a storage compartment .

In some embodiments the support structure includes a base assembly configured to support the device. In an

embodiment the base assembly comprises a lower base shell which is formed to house the inlet assembly and outlet assembly, and connect to the cap and a base cover. The base assembly can further comprise legs to support the device. The base assembly can further comprise a handle to facilitate carrying the device inverted. The base assembly can include a storage compartment.

An embodiment further comprises a heating element and wherein the cap includes a port to enable insertion of a heating element into the vessel. The heating element may be removable .

According to another aspect there is provided a liquid storage and dispensing device comprising:

an insulated vessel having an opening, and a support structure arranged to support the vessel in an orientation where the opening is in lower portion of the vessel for dispensing liquid from the vessel;

a dispensing structure comprising a cap configured to engage with the opening to provide a liquid tight seal between the opening and cap, the cap being configured to provide a port for enabling filling from a pressurised fluid supply, and dispensing of liquid from the vessel; and

a flexible bladder disposed within the vessel in communicating with the port, whereby as the bladder is filled using the pressurised fluid supply, air in the vessel external to the bladder is compressed to enable pressurised dispensing of the liquid via the outlet. Brief Description of the Drawings

An embodiment, incorporating all aspects of the invention, will now be described by way of example only with

reference to the accompanying drawings in which:

Figures la and lb show external views of an embodiment of an insulated portable liquid storage and dispensing device;

Figure lc shows an example of an internal vessel structure as a cross section through A-A of Figure lb;

Figure Id shows an exploded view of the device components; Figure 2 shows an example of internal components of a second embodiment of an insulated portable liquid storage and dispensing device;

Figure 3 shows an example of internal components of a third embodiment of an insulated portable liquid storage and dispensing device;

Figure 4 shows an example of components of a fourth embodiment of an insulated portable liquid storage and dispensing device;

Figure 5 shows an example of a heating element accessory for embodiments of the insulated portable liquid storage and dispensing device;

Figure 6 shows example of a one way valve;

Figure 7 shows an example of a two way valve;

Figure 8a shows a front view of an embodiment of an insulated portable liquid storage and dispensing device;

Figure 8b shows a rear view of the device of Figure 8a;

Figure 8c shows a cross section of the device of Figure 8a showing internal components;

Figure 9a is an exploded view of the main components of the device of Figure 8a;

Figure 9b is an exploded view of the device of Figure 8a illustrating assembly without the base;

Figure 9c shows an embodiment of the base assembly with stand pipe attached;

Figure 10 shows a cross section of an embodiment of a base assembly;

Figure 11 shows an exploded view of the base assembly of Figure 10;

Figure 12a shows an example of an embodiment of a bung; Figure 12b shows a cross section of the bung of Figure 12a;

Figure 12c shows an example of an alternative bung;

Figure 13a shown an example of a standpipe and valve assembly;

Figure 13b is a magnified view of the valve assembly of Figure 13a;

Figures 14a shows a view of a base of an alternative embodiment of the insulated liquid storing and dispensing device;

Figure 14b shows a cross section of the base of the device of Figure 14a;

Figure 15a shows and example of an alternative embodiment of the insulated liquid storing and dispensing device where the base section unclips from the main housing;

Figure 15b shows another alternative embodiment of the insulated liquid storing and dispensing device where the base section is hinged to the main housing;

Figure 16 is an exploded view of an example of an internal configuration for an embodiment of the device of Figure 15a or Figure 15b; and

Figure 17 illustrates embodiments of the device having different sizes and liquid storage capacities.

Detailed Description

Provided is a portable liquid storage and dispensing device comprising an insulated vessel having an opening, and a support structure arranged to support the vessel in an orientation where the opening is in lower portion of the vessel for dispensing liquid from the vessel, and a dispensing structure comprising a cap configured to engage with the opening to provide a liquid tight seal between the opening and cap. The cap is configured to support an air inlet assembly and an outlet assembly, the outlet assembly being configured for connection to an outlet fixture whereby liquid can be dispensed from the vessel, and the inlet assembly including a valve to allow air into vessel as liquid is dispensed. This enables the vessel to be fully sealed to improve heat retention. The valve may be operable in response to reduction in pressure within the vessel, caused by dispensing of liquid via the outlet. One problem of the know prior art of vessels for

dispensing liquids is heat loss from vents, lids or other openings in the top of a vessel. Even vacuum insulated pump cap type dispensers experience significant heat loss through the cap. Further, lack of sealing of these vessels represents a spill risk, for example if the vessel is knocked over the liquid may spill from the vent, potentially scalding users, or creating slip hazards.

By holding the vessel in a use position where the outlet and inlet are in the lower portion of the vessel

conservation of heat within the vessel can be improved.

This is partly due to removing the vent from the top of the vessel, which is a source of heat loss. The vessel being closed reduces heat loss from vents or other openings. The vessel being closed also reduces spill risks associated with vented lids or openings in the top of the containers, etc.

Another aspect that enables improved heat retention is the fact that the least insulated region of the vessel, the outlet and cap, is located in the lower portion of the vessel in a region of lower temperature due to thermal convection within the vessel, Due to thermal convection a thermal gradient will exist within liquid standing in the vessel, with lower temperature in the lower region in the vessel. Thus, the difference in temperature between the liquid and exterior environment is less in the lower region of the vessel.

Vacuum sealed insulated vessels lose the most heat from the region about the neck or mouth of the vessel where the inner and outer walls of the vessel join. For embodiments of the liquid storage and dispensing device using vacuum sealed vessels insulation in the neck region may be used to reduce heat loss . On one example the neck of the vessel around the opening may be insulated, for example with a foam or neoprene type insulating collar. In another example embodiment the cap may be configured to include insulating material to surround the opening to thereby insulate the region around the opening where the inner and outer walls join when secured on the vessel. In another embodiment the entire vessel may be housed within an insulating housing. In an embodiment the insulating collar may be form part of a supporting base structure for the vessel. Figures la-Id show different views of an example of an embodiment of the portable liquid storage unit 100, with Figures la and lb showing external views, Figure lc showing an example of an internal vessel structure for an embodiment of the portable liquid storage unit 100, as a cross section through A-A of Figure lb, and Figure Id showing an exploded view of the device components . This portable liquid storage unit 100 has an internal structure comprising a vacuum insulated vessel 110 having a single port 120. The port 120 is sealed by a cap or bung 125 within which an outlet 130 and inlet 135 are formed. The inlet 135 includes at least a one way valve 145 to allow ingress of air into the vessel in response to liquid being drawn off from the vessel via the outlet.

The inlet can also include a stand pipe 140 to allow the incoming air to be released into the vessel above the level of the liquid. In the exploded embodiment shown in Figure Id the valve 145 is attached to the top of the stand pipe by a valve housing 142. In an embodiment the valve 145 is removable, for example to allow replacement with a different type of valve (i.e. two way valve) or repair in the case of a fault with the valve 145. For example, in the embodiment shown in Figure Id the valve 145 is a one way non return type valve or check valve. This may be replaced with a two way valve in some

embodiments .

Although the embodiment of Figure lc shows the valve 145 located at the top of the stand pipe 140 the valve may be placed within the stand pipe or at the bottom of the stand pipe, for example as shown in Figure 9a and described in further detail below. The stand pipe is optional. For embodiments where the stand pipe is omitted the valve may be placed within the inlet 135 in the cap or at the mouth 138 of the inlet. An advantage of the stand pipe is this may simplify the valve requirements to avoid liquid leaking from the air inlet. As the stand pipe extends though the liquid to the top of the vessel (when the opening is lowermost) this will typically open to the space above the liquid level so that liquid cannot flow from the vessel into the inlet. It should be appreciated that some liquid may enter the stand pipe as this is placed into the filled vessel, or during transport, however this liquid may be purged as liquid is drawn off. For example, by incoming air forcing liquid out of the stand pipe. In some embodiments the stand pipe may be fitted with a valve to prevent liquid entry during insertion and/or transport. Another advantage of the stand pipe is that air will not "bubble up" though the - Il liquid. Incoming air bubbling through the liquid may have disadvantages in causing cooling of the liquid, for example by heat exchange and/or turbulence in the vessel disturbing thermal gradients within the vessel.

In some embodiments the valve is activated by decreasing pressure within the vessel, caused by the liquid being drawn off. An example of a one way non return valve suitable for use in an embodiment is shown in Figure 7. Another example of a suitable valve is a duckbill type valve. A variety of alternative valve types may be used in embodiments of the device.

The valve 700 is fitted to the stand pipe 140 and allows air to enter the vessel only (i.e. in the direction indicated by arrow 710), the valve is actuated by

decreasing pressure in the vessel relative to the external atmosphere. Opening the tap to draw liquid from the vessel (gravity causing the fluid flow) will cause decrease in pressure inside the vessel relative to the external atmosphere, this pressure differential will cause valve to open, to allow pressure equalisation. The valve may be configured to operate once a threshold pressure differential is achieved across the valve. The magnitude of the pressure differential required may vary between embodiments. For example, in a first embodiment the pressure differential may be sufficiently low to allow ingress of air in response to liquid cooling in the vessel, in other embodiments the differential threshold may be higher aiming to restrict air ingress to in response to liquid being drawn off only.

A two way valve is shown in Figure 6, this valve may allow air to exit the vessel in response to fluid being forced into the vessel via the outlet (for example by connecting a hose to a mains pressure hot water service to fill the vessel via the outlet tap/faucet) as well as to allow air into the vessel as liquid is drawn off. This embodiment allows the vessel to be filled without having to be inverted or the bung/cap 125 removed. The two way valve may be connected in T configuration at the top of the stand pipe with the inlet and outlet valve ends extending perpendicular to the stand pipe 140 for the embodiment shown in Figure 6.

Alternatively, the valve may be manually actuated. Manual actuation of the inlet valve can be linked to actuation of an outlet fixture, to simultaneously actuate the inlet valve with drawing of liquid from the vessel. An example of a manually operable valve arrangement may include a screw type linkage between an outlet actuator (such as a tap or faucet) and a rotationally operable poppet type valve located at the top of the stand pipe.

In operation the vessel will be supported in what one may consider an "inverted" position with the port 120 in the lowermost part of the vessel 110. This arrangement provides an advantage in utilising gravity feed for drawing off liquid from the vessel, allowing passive operation. Allowing ingress of air as liquid is drawn off by gravity feed allows the fluid to flow relatively smoothly. Having the air ingress via the inlet in the port in the lower portion of the vessel can improve heat retention. In traditional liquid storage vessels using gravity feed, an air ingress port or vent is provided in the top of the vessel. In most instances the vent or ingress port means the vessel cannot be sealed and heat will be lost from the top of the vessel via the port.

Using a valved inlet in the lower part of the vessel enables the vessel to remain sealed and improve heat retention .

An advantage of having the port in the lower portion of the vessel is improved thermal properties. The region of the vessel in which the port is formed is the region where the insulating properties are lowest or least effective, By virtue of placing this lowest insulation region toward the bottom of the vessel means that this region will also have the lowest temperature 1iquid due to thermal

convection within the vessel, Thus, the thermal

differential between the internal and external temperature of the vessel is also lower in this region. In the embodiment shown the vessel is supported within a housing 150 having a relatively flat top to be able to rest on for filing and a removable base 155 to allow access to the cap 125 for filling the vessel and to support the vessel in the inverted position. The housing can include a handle 158 for carrying. An example is shown in Figures la-d and an alternative example is shown in Figures 8a-d using the same reference numerals where appropriate. As is shown in Figures lc and Id the base can include an insulating collar 160. A channel 138 can be formed in the base to allow air into the inlet 135. A channel can also allow an outlet pipe to extend out of the base 132 for delivery of liquid. This pipe may also be configured for connection to a cooperating outlet fixture for liquid delivery.

In some embodiments the outlet may be provided with a fixture such as a tap or faucet, shower head etc. The outlet fixture may be detachable and varied depending on the planned use for the system. For example, for an embodiment designed for catering applications, storing hot water, coffee, tea, soup etc. may have a tap or faucet for an outlet fixture. An embodiment design for camping or outdoor sports use may have a faucet or a shower head type attachment. In some embodiments the fixtures may be interchangeable. The fixture may be configured to also act as an actuator and controller for liquid flow, for example a tap or a manually operable press button valve. Alternatively, a flow actuator or flow controller may be provided upstream of the fixture.

In an embodiment the outlet fixture may be configured to also allow ingress of air as fluid flows from the outlet, for example a venturi style port. Such an embodiment would allow a single inlet/outlet pipe to be used.

The cap/bung 125 can be removable to allow filling of the vessel and also cleaning. For example, the cap and port may have cooperating screw threads to allow sealing engagement. However, alternative arrangements such as gasket seals or clamping seals are also envisaged within the scope of the invention. It should be noted that the terms cap and bung are used interchangeably to refer to the component that seals the mouth 120 of the vessel 110, the mouth of the vessel is also referred to as the port.

In an embodiment the entire base assembly may be

configured to unscrew or unclip to allow access to the vessel port. In some embodiments the entire base is configured to unscrew with the bung, for example as shown in Figure 9a, in this embodiment the bung 910 for sealing the port is fixed in the base assembly 920. The whole base 920 is rotated to twist off for removal. In other embodiments the base can be secured by clips which are releasable to remove the base (for example as shown in Figure 15a) or the base may be hinged to allow the base to flip open (for example as shown in Figure 15b) .

In another embodiment the outlet may also be provided with a fitting to allow filling of the vessel from a

pressurised fluid supply, such as mains hot water. In this embodiment the inlet may also be provided with two way valves to allow egress of air as the vessel is filled. For example, as shown in the embodiment of Figure 2 the vessel 110 has a single port, and oriented so this port is in a lower position in use. In this embodiment the inlet valves allow both egress of air during filling and ingress of air in response to draining of fluid via the outlet. For example, in the embodiment shown the input stand pipe 240 has a first valve 245 that opens in response to slight negative pressure to allow air into the vessel, for example, as fluid is drawn from the vessel via the outlet. In this embodiment the stand pipe 240 also includes a second valve 248 that opens in response to positive pressure to allow air to exit the vessel as the vessel is filled. An example of a two way check type valve is shown in Figure 6. In this example the first valve may be a "duckbill" type valve configured to open in response to negative pressure. The second valve may be an umbrella type valve responsive to positive pressure, allowing air to vent as the vessel is filled. In another embodiment the inlet valve may be manually operated to open during filing. The valve being located at the top of the stand pipe reduces the risk of the valves being submerged during filling or drawing of liquid from the vessel. It should be appreciated that these embodiments and two way valve arrangements allow the vessel to be filled while being held in the inverted orientation. This also allows filling without fully opening the vessel, thereby reducing heat loss.

Another embodiment of the portable water storage device is shown in Figures 8a-c with details of the main

construction of the device described with reference to Figures 9a-c, and Figures 10, 11, 12a-c and 13a-b

providing detail of interior components . The storage device 800 as shown in Figures 8a-c has an interior insulated vessel 110 supported in an inverted position within a housing comprising a main body 150, a top section 950 and a base assembly 920. The base assembly has three legs 980 with leg extensions 985 shown in a stowed position. The leg extensions can be rotated to a deployed or stand position as shown in figure 8c. Figure 8a shows a front view of the device 800 showing the outlet tap 830, this embodiment is also configured to carry accessory components such as an optional thermometer 840 and/or volume gauge. Figure 8b shows a rear view of the device and the air inlet 135.

Figure 8c shows a cross sectional view of the storage device 800. The top assembly 950 may optionally be configured with a storage compartment 810, for example for storing a hose to aid filling and optionally a small pump for pressurising the vessel - for example for use as a shower) . Figure 8c shows the vessel 110 within the housing 150, which may include additional insulation, supported in an inverted position with the opening port 120 of the vessel 110 lowermost. A bung 910 is screwed into the neck 120 of the vessel to close the port. The bung 910 forms part of the base assembly 920 which houses components for the inlet and outlet assemblies shown in more detail in

Figures 10 and 11. The bung 910 supports the stand pipe 140 which in this embodiment is fitted with an internal valve as shown in further detail in Figures 13a and 13b.

Figure 9a and 9b are exploded views illustrating assembly of this embodiment of the device 800. The vessel 110 is fitted into the housing body 150 and in this embodiment is secured by one or more fasteners, in this embodiment clips 915. Alternatively the housing body me be secured using adhesive or other types of fastening means, such as clamps, or interference fit components. In an example interference fit between the vessel 110 and body casing 150 alone may be sufficient to hold the housing body 150 in place.

In the embodiment of Figure 8c a collar 930 is snap fitted (interference fit) to the neck of the vessel. The collar 930 can be insulated to provide additional heat retention. The collar may also be shaped to act as a funnel to aid fill the vessel 110. The collar can aid supporting the vessel in the inverted position on the base assembly. The collar 930 may be optional in other versions of the base assembly.

The base assembly 920 includes a bung 910 which supports a valved stand pipe 140 and is configured to screw into the vessel neck to close the port 120 and hold the base assembly 920 in place. Figures 10 and 11 show the base assembly in more detail with Figure 10 showing a cross sectional view of the base assembly as assembled and Figure 11 shows an exploded view of the base assembly of

Figure 10. The base assembly comprises a lower base shell 1120 which is formed to house the interior components. The lower base shell can be formed to provide legs or stand for the device. In the embodiment shown the lower base is also formed to provide a handle 990 for the device to facilitate handing, in particular inverting for filling. The handle 990 may be also provide leverage for unscrewing the base assembly from the vessel. The base can include elements to support internal

components and enable fastening of the bung 1110 and base cover 1125 to the lower base shell 1120.

The internal components of the base assembly include all components necessary for fluid communication between the inlet 1020 and outlet 1030 ports in the bung to the external inlet 135 and outlet 830. In the embodiment shown in Figures 10 and 11 the external facing fittings are also shown, for example the tap 830. In this

embodiment tubes 1130 are used to connect the bung inlet and outlet ports respectively to adaptors 1131, 1136 for external facing fittings for the inlet 1137 and outlet 1132, in this instance the outlet is a dial tap.

The lower base shell can be configured to facilitate placement and support of these internal components.

It should be appreciated that these external facing fittings may vary between embodiments and also may be changed without having to disassemble the base assembly 920, for example in the embodiment show the tap 1132 is secured to an adaptor 1131 using a screw fitting and O- rings or washers for improved water tight sealing. The external facing fittings may be unscrewed and substituted for alternative suitable fittings. For example, an inlet fitting may be substituted for a fitting having an air filter or for attachment of an air pump to pressurise the vessel. The dial tap outlet fitting may be removed and substituted for a different type of tap or faucet (i.e. push button or lever), hose or shower head fitting.

Once the internal components are connected and arranged the bung 1110 can be secured to the lower base shell, for example using screws or adhesive, and the base cover 1125 attached to the lower base shell. in the embodiment shown the fastening means is screws 912 however alternative fastening means may be used, for example clips, clamps, adhesive, snap fittings welding etc.

The valved stand pipe 1140 is connected to the inlet port in the bung 910. For example, this may be using a friction fit. Alternatively, the inlet port of the bung and stand pipe may be provided with cooperating screw threads for attachment. In another embodiment the standpipe may be attached using adhesive or mechanical fastening such as a clamp or screw. Any fastening means may be used provided fluid communication can be

maintained.

An embodiment of the bung is described in more detail with reference to Figures 12a and 12b. The bung 910 includes an inlet port 1220 and an outlet port 1230 through the bung 910, the inlet port being configured to for

attachment of a stand pipe 140. In this embodiment the bung has a screw thread 1210 for securing the bung 910 into the port 120 of the vessel 110 and sealingly engage with the periphery of the port 120. Extending outwardly from the bung allowing fluid communication from the inlet 1220 and outlet 1230 ports respectively are fittings 1222, 1232 for attachment of respective inlet and outlet assemblies. The configuration of these assemblies may vary depending on the embodiment to accommodate variations in inlet and outlet assemblies. In the embodiment shown in Figure 12a and 12b the bung has a two part constructions with a bung base 1214 and a bung insert 1212 configured to snap fit together and optionally be permanently secured using screws or other fasteners. The bung may include screw holes or bosses to facilitate connection of the two parts, alternatively the two parts may be secured using adhesive or friction fit. In an alternative embodiment the bung may have a unitary construction. The bung base 1214 may include a flange or shoulder 1216 configured to abut the edge of the vessel mouth 120 when attached. This flange or shoulder 1216 can have advantages for improved sealing with the vessel mouth. This flange or shoulder 1216 may also prevent the bung being screwed too far into the mouth 120 of the vessel 110.

In some embodiments the bung may also include additional ports 1250 for fitting of accessories requiring contact with the fluid in the vessel, for example see Figure 12c. For example, and additional port may be used to fit a sensor for a temperature gauge. In another example an additional port may be used for a pressure sensor or volume sensor. In another example an additional port may be used for a heating element. The bung and base assembly may be modified form the version shown to accommodate wiring or other support required for the optional

accessories .

An embodiment of a valved stand pipe is shown in further detail in Figures 13a and 13b, with Figure 13b showing the valve assembly in further detail. In this embodiment the stand pipe 140 has a hole 1310 to reduce the likelihood of blockage of the airflow communication between the stand pipe and the vessel interior, for example if end of the stand pipe is closed against an interior wall of the vessel. This may only be required for embodiments where the overall length of the stand pipe and valve assembly is configured to match the interior length of the vessel 110. In this embodiment the stand pipe 140 has a valve assembly 1320 in the proximal end of the standpipe to the bung 910. The valve assembly is shown magnified in Figure 13b and comprises a two way valve 1330 in line with the fluid flow from the stand pipe 140 and a connector 1340 for the bung inlet port. The valve 1330 is actuated by pressure differential between the interior of the vessel and the external atmosphere . Figures 14a and 14b illustrate another embodiment of the device, where the bung includes an additional sealable port to allow filing of the vessel without removal of the base assembly. In this embodiment the base assembly may be removed for cleaning the vessel interior, but for simply filling the vessel a port 1410 is provided through the bung and base assembly. This port 1410 can be closed with a stopper or cap (not shown) for ordinary use. This additional port may also be used for insertion of an immersion heating element to heat water within the vessel. In an embodiment using a two way valve and the heating element inserted liquid may be heated in the vessel with the vessel in the inverted position and the two way valve serve to allow pressure release as the water is heated. The heating element may be used temporarily to heat the liquid. The thermal insulation properties serve to retain heat in the liquid when the heating element is tuned off.

The vessel support structure may be a stand or housing configured to support the vessel in the inverted position for use. The support structure may also be configured to support the vessel in an orientation where the port is uppermost (in an "upright" position) to enable filling of the vessel. For example the vessel support structure may comprise a housing configured to provide a flat or substantially flat base in both the upright filing orientation, with the port in an upper region, and the inverted use orientation with the port in a lower

position. An example of such an embodiment is shown in Figure la-d. Another example, as shown in Figures 8a-c, and 15a-b, a carrying handle 158 and part of the housing are configured to support the vessel 110 substantially upright for filling. In this embodiment the device leans when in the fill position, but the lean is restricted to around 0-30 degrees to avoid compromising stability of the apparatus in the fill position. The lean may be

beneficial for placement under taps or faucets for filling.

In another embodiment the support structure is a stand in which the vessel can be supported in either orientation. In another embodiment the support structure rotatably supports the vessel to allow the orientation to be changes between filling and dispensing orientations without removal from the support structure, for example, a rotational mounting to a stand. For example, such an embodiment may be desirable for catering type

applications, to allow refilling from kettles etc., without having to remove the vessel from the table. In another embodiment the support structure may include a handle to allow the vessel to be hung from a hook, branch, beam or other support .

In an embodiment the support structure is integral to or attached to the cap to support the vessel in the inverted position. The vessel may also be provided with a top portion to allow the vessel to be stood with the port uppermost for filling. The support structure may have built in legs to provide elevation for the device when in the inverted position, for example for easier access to the outlet. For example, the embodiment shown in figures 8a-c and 9a-b has a base portion 920 formed with 3 short legs 980 each with an extension portion 985 that can be rotated from a stowed position proximate the base to a use position where the apparatus can stand on the leg

extensions 985 elevated relative to the support surface. The "flip out" legs 985 can therefore be used optionally, other embodiments such as telescoping or snap on legs are also envisaged. The embodiment shown has 3 legs which can have advantages for stability, but 4 or more legs may also be used. In some embodiments the legs may be fixed and leg extensions not used.

Figure 15a shows and example of an alternative embodiment of the insulated liquid storing and dispensing device where the base section unclips from the main housing.

This embodiment the base 1520 can be secured to the housing 150 using clips or other fasteners 1510, 1510' . In this embodiment the bung can be configured for a pressure seal, for example using O-rings or gaskets to seal against the mouth 120 of the vessel 110. Figure 15b shows another alternative embodiment of the insulated liquid storing and dispensing device where the base section is hinged to the main housing. In this embodiment a hinge 1530 attaches one side of the housing 150 to the base assembly 1520 and one or more clips may be used to releasably secure the other side of the housing 150 to the based assembly 1520. For a hinged embodiment the length of the stand pipe may interfere with opening if this is directly attached to the bung. Figure 16 is an exploded view of an example of an internal configuration for an embodiment of the device of Figure 15a or Figure 15b where the standpipe 1610 is not directly connected to the inlet port of the bung. Rather, in this embodiment the top surface of the bung is substantially flat and the

standpipe has a flange 1620 adapted to engage with the flat top surface of the bung, with inlet and outlet ports through the flange adapted to align with the inlet and outlet ports of the bung when the housing is closed. The standpipe and flange may be removed to allow access to the vessel interior when the base is opened. The flange and bung may be configured with indexing or alignment

structures, for example cooperating grooves or spigots and sockets to ensure correct orientation of the standpipe and bung during reassembly and closure. Alternatively, for an embodiment having a flip/clip off base assembly is configured for the base assembly to separate from the inlet and outlet assemblies connected to the bung as the base is undipped.

Figure 17 illustrates embodiments of the device having different sizes and liquid storage capacities. This example shows that the same or similar top 1710 and base 1720 assemblies may be used with different housing body lengths 1730, 1740 to adapt the device for different capacity vessels having the same diameter and vessel mouth configuration. This ability to minimally vary the housing can have advantages in manufacturing costs and inventory management as the same top 1710 and base 1720 assemblies can be used for different capacity vessels. Some examples of specific embodiments of the portable water storage and dispensing vessel designed for outdoor use, for example camping type use, will now be discussed with reference to Figures 3 to 5.

Figure 3 shows an example of an alternative embodiment where the insulated vessel 310 is provided with an internal pressure bladder 315 configured to expand as the vessel is filled from a pressurised fluid supply (for example a mains pressure hot water supply) . The outlet can be provided with a faucet or other type of outlet configured to maintain pressure in the vessel unless opened. The bladder then provides pressure to expel the fluid from the vessel, as the outlet is opened.

Optionally an inlet can be provided to allow attachment of a pump to increase pressure in the vessel, or to enable pressurisation if no pressurised fluid supply is available for filling the vessel. In an embodiment the inlet may also be provided with a valve operable in overpressure conditions. Such a valve can be configured to allow venting to avoid potential damage to the bladder due to overpressure conditions, for example due to changing atmospheric pressure conditions or over-pumping. In some embodiments the bladder is removable, for example for cleaning or replacement. In an embodiment the bladder may be disposable to minimise cleaning requirements for the vessel, for example to embodiments designed for catering to reduce risks of contamination or bacteria due to inadequate cleaning.

It can also be observed from the drawing of Figure 3 that this embodiment does not require an internal stand pipe. Even the inlet is optional in this embodiment. It should be appreciated that the inlet may be omitted as the pressure in the vessel will force the liquid from the outlet, thus air inlet to allow smooth gravity feed is not required .

Figure 4 shows another camping style embodiment, in this embodiment the vessel 410 can be pressurised via a pump, for example a manual foot or hand held pump, a battery operated or electric pump may also be used. In this embodiment the inlet is provided with a two way valve 4 configured to allow ingress of air from the pump 420 to pressurise the vessel. This allows the fluid to be dispensed at higher pressure than gravity feed. For example, allowing the use of pressure nozzle, gun type outlet fixtures or water saving shower heads, etc. The valve can also be configured to allow ingress of air once the head pressure in the vessel drops enough to revert to gravity feed for dispensing liquid. In an embodiment the pump and shower fittings can be detachable. This can enable an embodiment having a "standard" cap with a two way valve inlet and outlet, which can be connected to the pump and shower fixture to configure the device as the embodiment described above. However, the device can also be configured as a pure gravity feed embodiment with the pump removed .

The support structure can include a handle for convenient carrying. The handle may be a solid handle, alternatively a strap or backpack type harness may be provided. A housing can also include additional insulation and be configured to allow the vessel to be stood inverted (for dispensing) or upright (for filling manually). In the depicted example the cap or bung sealing the port in the vessel is also configured to act as a base for the vessel when in the inverted/dispensing position. The cap or bung can also be manufactured using insulating materials where possible, for example plastics, ceramics or other

materials having low heat transfer properties.

In an embodiment the air inlet may also include an air permeable shield - for example mesh or a filter - to reduce risk of ingress of insects, dirt or other foreign material. The outlet may also be provided with a cap or cover to avoid accidental activation of the outlet (for example by people, animals, insects or objects bumping into the outlet actuator) . For an embodiment configured for outdoor use, the outlet may also be provides with a mesh or lattice type cover to prevent insect etc. getting into the outlet.

Figure 5 shows an example of an additional accessory for the vessel comprising an emersion heater element. In an example the emersion heater element 520 may be configured to fit within the vessel 510 and be mounted on a cap or bung 530 which sealingly engages with the vessel port. In this example the cap carrying the inlet and outlet is substituted for a cap 530 carrying the emersion heater element. The heater element 520 can be powered using any suitable power supply 540, for example mains power, batteries, solar, wind generator etc., and be inserted temporarily for heating the water or other liquid in the vessel. Once the liquid is heated the heating element can be removed and replaces with a dispensing cap comprising a fluid outlet and air intake as described above. In an alternative embodiment the emersion heater element may be provided on the dispensing valve and configured to continuously or intermittently heat the fluid in the vessel. The heater element may be provided with

thermostatic control and/or manual switching control. In an embodiment the emersion heater may be inserted into the vessel and the liquid heated while the vessel is in the "upright" position with the opening at the top of the vessel, without the vessel being sealed during heating. For example, this embodiment may be advantageous as this may allow the liquid to be brought to a high temperature or boiling without risk of excessive pressure build-up within a sealed vessel. Using a two way pressure valve can allow pressure release from the vessel during heating when the vessel is in the inverted position. Another example embodiment is configured for catering type purposes, for example for dispensing hot water or

beverages . In such an embodiment it may be desirable to limit the flow rate for drawing off liquid from the vessel. In one embodiment this is achieved by configuring the air inlet assembly maximum ingress flow rate to limit the corresponding outlet flow rate. As the vessel is sealed, air will be drawn into the vessel at substantially the same rate as liquid is being drawn off via gravity feed, to maintain air within the vessel at substantially atmospheric pressure. By configuring any one or more of, the valve, stand pipe diameter or inlet diameter to limit the air intake to a target maximum flow rate, the maximum flow rate at the outlet will be correspondingly limited. For example, this could have an advantage in being able to configure the device such that even with the vessel full and the outlet fully opened, the flow rate is limited by the air intake so hot coffee will be dispensed smoothly at a rate unlikely to splash from a user' s cup potentially causing scalds. Similarly, an embodiment designed to provide hot or warm water for hand washing may have a flow limiting inlet configuration, for example for water conservation . In an embodiment the inlet may include a component having an adjustable diameter to allow the maximum flow rate to be adjusted. For example, in a simply the inlet may have a removable plug with an aperture therethrough to limit the inlet flow rate to a first rate with the plug inserted and a second higher flow rate with the plug removed.

Alternatively, the inlet may have a component with an aperture of adjustable diameter to allow controlled adjustment of the inlet flow rate, for example an iris type aperture .

In the embodiments shown in the above examples the vessel is a cylindrical vacuum flask having the port formed in one end. However other embodiments are envisaged, for example oblong or square vessels. The port or the inlet and outlet need not be central to the vessel, for example it could be formed in one edge or shoulder of the vessel, configured to be in a lower portion of the vessel in the storage and dispensing position. In some embodiments more than one port may be provided, however, this may

compromise the thermal properties of the vessel due to having two regions of lower insulation. It is important that any ports in the vessel be formed in areas that will be in the bottom or lower region of the vessel when it is in the storage and dispensing orientation.

Additional accessories may be provided or incorporated into the device configuration. For example, a housing base may be concave to act as a funnel to aid filling of the vessel when oriented such that the opening is upward. Accessories for aiding standing, hanging or otherwise securing the vessel in use can also be provided. A variety of outlet fittings may be provided for different use applications .

In an embodiment the cap/bung may have indentations or grooves to ensure that some air will be in the vessel, such that the air inlet at the top of the stand pipe will not be submerged when the vessel is oriented with the opening downward. This can be advantageous for minimising potential leakage of liquid via the air inlet.

In an embodiment the device may be incorporated into a portable camp kitchen, with the housing mountable to a support structure, for example above a table or bench with a trough or basin below.

It will be understood to persons skilled in the art of the invention that many modifications may be made without departing from the spirit and scope of the invention. It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

In the claims which follow and in the preceding

description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as

"comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

Claims

1. A liquid storage and dispensing device comprising:

2. A liquid storage and dispensing device as claimed in claim 1 wherein the first valve of the inlet assembly is operable in response to reduction in pressure within the vessel, caused by dispensing of liquid via the outlet.

3. A liquid storage and dispensing device as claimed in claim 1 or claim 2 wherein the inlet assembly includes a stand pipe to extend through the fluid in the vessel to the top of the vessel such that when oriented with the opening in the lower portion of the vessel air from the inlet is delivered via the stand pipe to the top of the vessel interior.

4. A liquid storage and dispensing device as claimed in claim 3 wherein the first valve is located on the stand pipe at an end a distal from the cap.

5. A liquid storage and dispensing device as claimed in claim 3 wherein the first valve is located at the end of the stand pipe proximal the cap.

6. A liquid storage and dispensing device as claimed in any one of claims 3 to 5 wherein the inlet assembly further comprises a second valve configured to allow air to out of the vessel via the inlet, the second valve bei located proximate the first valve on the stand pipe.

7. A liquid storage and dispensing device as claimed in any one of claims 3 to 6 wherein the stand pipe includes third valve to inhibit entry of liquid to the stand pipe during submersion.

8. A liquid storage and dispensing device as claimed in any one of the preceding claims wherein the outlet includes a valve to prevent leaking. 9. A liquid storage and dispensing device as claimed in any one of the preceding claims wherein the outlet assembly is configured for connection to an outlet fixture . 10. A liquid storage and dispensing device as claimed in claim 9 wherein the outlet fixture is removable.

11. A liquid storage and dispensing device as claimed in claim 9 or claim 10 wherein the outlet fixture comprises a faucet or tap.

12. A liquid storage and dispensing device as claimed in claim 9 or claim 10 wherein the outlet fixture comprises a shower head.

13. A liquid storage and dispensing device as claimed in any one of the preceding claims wherein the outlet is configured to allow filling of the vessel via the outlet. 1 . A liquid storage and dispensing mechanism as claimed in any one of the preceding claims wherein the cap is removable .

15. A liquid storage and dispensing device as claimed in any one of the preceding claims wherein the support structure is further arranged to allow the vessel to be supported in an orientation where the opening is in an upper position for filling of the vessel.

16. A liquid storage and dispensing device as claimed in claim 14 wherein the support structure comprises a vessel housing allowing the vessel to be rotated from an upright to an inverted orientation.

17. A liquid storage and dispensing device as claimed in any one of claims 1 to 14 wherein the support structure incorporated into the cap.

18. A liquid storage and dispensing device as claimed m claim 1 further comprising a pressuring mechanism, to create positive pressure in the vessel.

19. A liquid storage and dispensing device as claimed in claim 18 wherein the pressuring system is a manually operated air pump. 20. A liquid storage and dispensing device as claimed in any one of the preceding claims wherein the insulated vessel uses vacuum insulation.

21. A liquid storage and dispensing device as claimed in claim 14 wherein the cap and vessel opening have

cooperating a screw threads and the cap is unscrewed for removal .

22. A liquid storage and dispensing device as claimed in claim 21 wherein the cap and a base of the support structure are connected to unscrew as a single component.

23. A liquid storage and dispensing device as claimed in claim 22 further comprising a collar snap fitted to the neck of the vessel and shaped to act as a funnel to the opening .

24. A liquid storage and dispensing device as claimed in claim 23 wherein the collar is insulated.

25. A liquid storage and dispensing device as claimed in claim 15 wherein the support structure includes a top assembly having a substantially flat top portion wherein the device can be supported on the top portion with the vessel in an orientation where the opening is in an upper position for filling of the vessel.

26. A liquid storage and dispensing device as claimed in claim 25 wherein the top assembly includes a handle.

27. A liquid storage and dispensing device as claime claim 25 wherein the top assembly includes a storage compartment .

28. A liquid storage and dispensing device as claimed in claim 1 wherein the support structure includes a base assembly configured to support the device.

29. A liquid storage and dispensing device as claimed m claim 28 wherein the base assembly includes a storage compartment .

30. A liquid storage and dispensing device as claimed m claim 29 wherein the base assembly comprises a lower base shell which is formed to house the inlet assembly and outlet assembly, and connect to the cap and a base cover.

31. A liquid storage and dispensing device as claimed in claim 28 wherein the base assembly further comprises legs to support the device.

32. A liquid storage and dispensing device as claimed in claim 28 wherein the base assembly further comprises a handle to facilitate carrying the device inverted.

33. A liquid storage and dispensing vessel as claimed in claim 6 further comprising a heating element and wherein the cap includes a port to enable insertion of a heating element into the vessel.

34. A liquid storage and dispensing device comprising: an insulated vessel having an opening, and a support structure arranged to support the vessel in an orientation where the opening is in lower portion of the vessel for dispensing liquid from the vessel;

a flexible bladder disposed within the vessel in communicating with the port, whereby as the bladder is filled using the pressurised fluid supply, air in the vessel external to the bladder is compressed to enable pressurised dispensing of the liquid via the outlet.