Patent Description:
Cup assemblies for use by infants typically comprise a spout or nipple, and include a valve which can be opened via the application of negative pressure by suction on the spout or nipple by the infant. However, such a valve arrangement can have several disadvantages. Suction operated valves are often subject to leaks. Because the valve must be opened by the application of negative pressure by an infant, the valve must necessarily have a relatively small sealing force and can be easily inadvertently opened. For example, liquid can impact the valve member from within the cup and act to push the flexible part of the valve open, especially when the cup is vigorously shaken, inverted, or when the cup is accidentally dropped. Furthermore, the infant is restricted to drinking from the spout. This requires the infant to hold the cup in a certain orientation. The functionality offered by such a cup does not prepare the infant for using `open ended' cups, from which the infant will be expected to drink as an adult.

It has been appreciated that a drinking cup assembly having a valve which is operated by direct contact pressure from the lips of an infant can mitigate some of the above detailed problems. This arrangement not only allows a stronger seal to be provided, but the arrangement can also be designed such that the infant can drink from any point around a rim of the cup. Known lip-openable valve assemblies tend to provide poor seals and/or can be difficult to actuate. Several known assemblies comprise numerous components, which are not easy to fit together, i.e. assemble and disassemble. Reducing the number of parts, and increasing the ease with which these parts fit together, improves the user's interactions with the valve assembly, as well as making the assembly simpler to clean.

Additional factors to consider include the ease and cost of manufacture. Known assemblies have several parts and utilise large, multi-material components. Reducing the number of components, as well as reducing the size and complexity of these components, results in a simple, lightweight and cost-effective valve assembly and/or element.

Further drinking cups are known that employ suction valves arranged around the annular lip of a drinking vessel. However, these arrangements often have to balance the ability to prevent leaks against the provision of a drinking cup that is easy to drink from. Hence, the known valves may react to low amounts of suction and be easy to drink from but may not be reliably leak-proof. Alternatively, if the vessels and valves are reliably leak-proof then they typically require significant suction to open the valve, in which case they are not easy to drink from.

<CIT> discloses a drinking vessel including a generally cylindrical container adapted to contain liquid and a generally cylindrical lid adapted to close the container. <CIT> discloses a non-spill container assembly having a container, a collar and an annular seal from which drinking can occur at any location around a rim of the container assembly. <CIT> discloses a drinking vessel having a generally cylindrical container for containing liquid, and a lid that includes a generally cylindrical inner member and a generally cylindrical sealing element which surrounds the inner member. <CIT> discloses a drinking vessel closure including an outer body member including an edge defining a drinking rim and at least one aperture configured to permit fluid flow from the drinking vessel. <CIT> discloses a cup including a container having an opening closed by a removable element including a first rigid part and a second elastically deformable part. <CIT> discloses a valve assembly according to the preamble of claim <NUM>.

Some known valves, for example Berg <CIT>, have attempted to address the above problem by constraining the flow of liquid from within the drinking vessel to the valve seal. However, whilst attempting to solve the above problem the drinking cup of Berg has limited or restricted the flow of liquid near the sealing surface / drinking location and thereby introduced another compromising feature.

The present invention seeks to address disadvantages encountered in the prior art by providing an improved valve assembly.

Independent claim <NUM> defines a valve assembly and independent claim <NUM> defines a method of assembling the claimed valve assembly.

Dependent claims describe optional features.

According to an example not in accordance with the wording of the claims, but considered useful for understanding the invention, a valve assembly for allowing a user to drink from any point around an upper rim of a drinking vessel is provided. The valve assembly comprises a vessel flared surface, the flared surface flaring upwards and radially outwards toward the vessel upper rim. The valve assembly also comprises a valve element comprising a sealing cap and a cylindrical portion connected via connecting means, the connecting means comprising at least one aperture. The sealing cap comprises a flared portion, the flared portion flaring upwards and radially outwards to meet the flared surface to form a seal therewith.

The flared surface flares upwards and radially outwards toward the vessel upper rim, and may terminate at the vessel upper rim, and/or terminate to form the vessel upper rim. Reference is made to a flared surface of a vessel and a vessel upper rim, and it will be appreciated that this structure may be formed on an inner surface of a collar or other vessel component. In other words, the vessel may comprise multiple components, as is detailed below. The vessel upper rim may be the rim from which the user drinks and/or on which the user places their lower lip when drinking from the valve assembly.

The connecting means may take many structural forms, provided it can fulfil its function of connecting the annular cap and cylindrical portion of the valve element, and allow the flow of fluid therethrough. The connecting means may comprise a cylindrical connecting portion, which in turn may comprise at least one, or in some embodiments a plurality, of apertures. The connecting means may be an upper region of the cylindrical portion.

Optionally, the flared portion meets the flared portion of the vessel at, or adjacent to, the upper rim of the vessel.

The flared portion may meet an interior or inner surface of the vessel at or adjacent to the rim such that the user can apply suction and/or lip pressure to the vessel upper rim and/or the outer rim of the flared portion, and thereby cause the outer rim of the flared portion to deform and lift away from the flared surface. Thus, the user can open the valve by applying suction to the vessel upper rim and/or the outer rim of the flared portion.

Optionally, the flared surface comprises an annular valve seat surface, and the flared portion comprises an annular valve face.

Optionally, in a rest position of the valve assembly, the annular valve face is biased toward the valve seat surface.

A biasing force may be provided by flexible resilient material comprised in the flared portion. Alternatively or additionally, the flared portion and/or sealing cap may be sized such that, when the valve assembly is in an assembled state and the valve element is attached to and fixed inside the vessel, the outer rim of the flared portion presses into an inner surface of the vessel. Thus, a seal may be formed due to the relative sizes of the valve element and vessel.

Optionally, the sealing cap, connecting means and cylindrical portion form an integral valve element.

Optionally, the valve assembly comprises, and is configured to operate with, two components, the first component comprising the drinking vessel, and the second component comprising the integral valve element.

It will be appreciated that the provision of a valve assembly which can operate as a valve with two components, and in particular with only two components, are advantageous. Methods of manufacture can be improved as material costs can be reduced and the simplicity of manufacture can be increased. Users of the valve assembly can also more simply take apart and re-assembly the valve assembly, for example in order to clean the assembly or fill the vessel.

Optionally, the flared portion further comprises flexible, resilient material which, upon the application of suction to the outer rim of the flared portion, is configured to deform and lift from the flared surface to open the valve assembly.

Optionally, the resilient, flexible material is arranged such that, upon the application of suction and/or pressure from a user's lips at a particular point on the outer rim of the flared portion, the outer rim of the flared portion moves away from the vessel inner surface in the vicinity of the particular point, and remains sealed against the inner surface around the remainder of the circumference of the inner surface.

It will be appreciated that movement of the valve element only at, or only in the vicinity of, a location of the user's lips means that less material must be moved in order for the valve to open. Thus, the valve can be made more sensitive, and a user can therefore use less force and/or suction when opening the valve.

Optionally, the valve assembly is assembled, the valve element is arranged coaxially with, and fits inside, the vessel.

Optionally, a flare gradient of the flared portion of the valve element is greater than a flare gradient of the flared surface, such that the flared portion flares upwards and radially outwards to meet the flared surface to form a seal therewith.

Optionally, the attachment means comprises one of a screw thread, a bayonet fitting or a push-fit arrangement.

Optionally, the cylindrical portion comprises attachment means for removably attaching the valve element to the vessel.

Optionally, the flared surface is an inner surface of the vessel.

Optionally, the vessel comprises a collar component comprising the flared surface and the upper rim, and a lower component comprising an interior region for storing fluid. The collar component and lower component may be removably attachable to one another via attachment means.

Optionally, the valve assembly further comprises a vessel comprising the flared surface.

According to another example not in accordance with the wording of the claims, but considered useful for understanding the invention, there is provided a valve assembly for allowing a user to drink from any point on a perimeter of a rim of a drinking vessel. The valve assembly comprises:
a sealing member extending from an inner surface of the vessel, the sealing member comprising an annular valve face surface having an outer rim; and a valve element arranged to be removably fixed to the vessel and comprising an outer rim comprising a valve seat. When the valve element is fixed to the vessel: in a rest position, the annular valve face surface is configured to be biased toward the valve seat, and upon the application of pressure from a user's lips to the outer rim of the annular valve face surface, the annular valve face surface is arranged to move away from the valve seat, thus opening the valve.

Optionally, in the rest position, the annular valve face surface is biased toward the valve seat in a biasing direction, and upon the application of pressure from a user's lips to the outer rim of the annular valve face surface, the annular valve face surface is arranged to move away from the valve seat in a direction opposed to the biasing direction.

Optionally, the sealing member is arranged coaxially with, and is arranged to fit inside, the vessel.

Optionally, the valve element is arranged coaxially with, and is arranged to fit inside, the vessel and sealing member.

Optionally, the sealing member is fixed to an inner surface of the vessel, optionally around the circumference of the inner surface.

Optionally, the sealing member is integral with the vessel.

Optionally, the valve assembly is arranged to operate with two components, the first component comprising the vessel and the sealing member, and the second component comprising the valve element.

Optionally, the valve element is arranged to be removably fixed to the vessel via a screw fit arrangement, and a biasing force between the annular valve face surface and the valve seat can be adjusted by adjusting the screw fit.

Optionally, the valve face surface flares radially outward.

Optionally, the vessel rim flares radially outward. The vessel rim may also flare upwards, such that the vessel rim flares upwards and radially outwards.

Optionally, the annular valve face surface is arranged to move from the rest position and away from the valve seat upon the application of direct contact pressure from a user's lips to the outer rim of the annular valve face surface.

Optionally, the annular valve face surface is comprised of resiliently flexible material, and is biased against the valve seat due to the resilient nature of the material.

Optionally, the annular valve face surface extends substantially parallel to the vessel in the region of the upper rim of the vessel.

As will be described in further detail below, this provides a degree of protection to the annular valve face surface from forces which impact the outside of the vessel. This protection is particularly important when the valve face comprises flexible material.

Optionally, the annular valve face surface comprises resilient, flexible material and is arranged such that, upon the application of pressure from a user's lips at a particular point on the outer rim of the annular valve face surface, the annular valve face surface moves away from the valve seat in the vicinity of the particular point, and remains biased toward the valve seat around the remainder of its circumference.

Optionally, the vessel comprises a collar component comprising the sealing member; and a lower component comprising an interior region for storing fluid. The collar component and lower component may be removably attachable to one another via attachment means.

According to yet another example not in accordance with the wording of the claims, but considered useful for understanding the invention, there is provided a valve element of a valve assembly for allowing a user to drink from any point on a perimeter of a rim of a drinking vessel, the valve element comprising: an outer rim and an annular valve face. The annular valve face is located on a lower surface of the valve element and is arranged, when the valve element is attached to the drinking vessel and is in a rest position, to oppose a valve seat surface. The valve element also comprises at least one pivotal protrusion arranged on the lower surface of the valve element between the outer rim and annular valve face such that, upon the application of pressure from a user's lips to the outer rim, the at least one pivotal protrusion contacts the valve seat surface, and the annular valve face moves away from the valve seat surface via a pivoting movement around the at least one pivotal protrusion. Optionally, the annular valve face and outer rim are integral and are comprised of resilient, flexible material.

Optionally, the annular valve face and outer rim are arranged such that, upon the application of pressure from a user's lips at a particular point on the outer rim, the annular valve face moves away from the valve seat surface in the vicinity of the particular point, and remains opposed to the valve seat around the remainder of its circumference.

Optionally, the valve seat surface is an inner surface of the vessel.

Optionally, the annular valve face is a rounded bead, rib or ridge, which is arranged to roll on the valve seat surface upon the application of pressure from a user's lips to the outer rim.

Optionally, the sealing cap is comprised at least in part of resilient and flexible material, and the annular valve face is biased against the valve seat due to the resilient nature of the material. Optionally, the sealing cap is comprised at least in part of resilient and flexible material and of rigid plastic material.

Optionally, the valve element comprises a plurality of pivotal protrusions.

Optionally, the valve assembly is configured to operate with two components, the first component comprising the vessel, and the second component comprising the valve element.

The several advantages of a valve assembly which may operate as a valve with just components, and in particular with only two components, are set out herein.

Optionally, when the valve assembly is in a rest position, the annular valve face surface is biased toward the valve seat in a biasing direction. Upon the application of pressure from a user's lips to the outer rim of the annular valve face surface, the annular valve face surface is arranged to move away from the valve seat in a direction opposed to the biasing direction.

According to yet another example not in accordance with the wording of the claims, but considered useful for understanding the invention, a valve assembly is provided, the valve assembly comprising any valve element described herein attached to the drinking vessel.

Optionally, the drinking vessel comprises a collar component comprising an inner surface which forms, or which comprises, the valve seat surface; and a lower component comprising an interior region for storing fluid. The collar component and lower component may be removably attachable to one another via attachment means.

According to the invention, there is provided a valve assembly comprising:.

In certain embodiments, the body is substantially frustoconical. Advantageously, the arrangement provides optimum location of the resiliently deformable portion when the valve element is inserted into a drinking vessel thereby allowing easy access for the user's lips when drinking. More specifically, the frustoconical shape provides a recess that allows the user's top lip to seal against the body in a natural position and drink from the cup without it feeling awkward or unusual.

In certain embodiments the body comprises a baffle which comprises channels or openings configured to control flow of liquid to the resiliently deformable portion. The baffle may be fixed or connected to the body in any known manner, such as by fastener or by the inter-engagement of the baffle with the body via a push fit, or by moulding the baffle and body as a unitary part. In this way, when the valve element is inserted into the vessel, the baffle is configured to be between the main liquid held in the vessel and the resiliently deformable portion of the valve element. Consequently, if the valve assembly is knocked over or falls, the baffle is able to prevent the whole volume of liquid from hitting the lower surface of the resiliently deformable portion in a way that would otherwise cause the valve assembly to leak.

In certain embodiments, the channels or openings are located at the perimeter of the baffle. In this way, the channels are configured to allow liquid to easily flow through them when the body is inserted into a vessel to form a valve assembly and the user deliberately tilts the valve assembly to drink from it. Alternative configurations and shapes of the channels or openings which increase or reduce the space available for liquid to flow through may be selected as appropriate.

In certain embodiments, the baffle is rigid. The baffle is thus configured to attach the valve element to a vessel in such a way as to reliably locate the resiliently deformable rim at the desired vertical position on a vessel inner wall. Suitable rigid plastics material can be selected from the art and may include thermoplastic materials such as one of polypropylene PP, polycarbonate PC, polyphenylsulfone PPSU, glass-filled nylon, or similar material blends as appropriate.

In certain embodiments, at least the resiliently deformable portion of the valve element comprises an elastomer. Accordingly, the resiliently deformable portion can be deformed into different planes or can be made to fit within smaller diameters, such as to easily fit within a vessel or container. Suitable elastomers can be chosen from the art and may include one of silicone rubber, thermoplastic elastomer (TPE), ethylene propylene diene, styrene butadiene or polyurethane, or suitable blends as appropriate. Such materials allow the resiliently deformable portion to be soft enough to flex and still be self-supporting.

More specifically, the elastomer has a Shore A hardness in the range <NUM>-<NUM>. Yet more specifically, the elastomer has a Shore A hardness in the range <NUM>-<NUM>.

In certain embodiments, the resiliently deformable portion has a thickness dimension substantially between <NUM> and <NUM>. More specifically, the resiliently deformable portion has a thickness dimension of <NUM>. In a similar way to that described above, these thickness dimensions enable the resiliently deformable portion to be soft enough to flex and deform, and still be self-supporting.

The resiliently deformable portion has a lower surface, the lower surface comprising a sealing surface configured to provide a sealing abutment with an engagement surface of a drinking vessel. In this way, when the valve element is inserted into a vessel, it is able to form a leakproof seal capable of preventing liquid from escaping from a valve assembly, for example when the valve assembly is knocked over.

The rim of the resiliently deformable portion has an outer edge and when the rim is in the second plane, the outer edge is configured to sit above the sealing surface. In this way, the rim is configured to form a reliable sealing abutment but is sensitive to suction from the user's mouth. Thus, when the valve element is inserted into a vessel and the user places their lips around the vessel lip in order to take a drink, their lips easily contact and seal to the outer edge so that only a small suction force, akin to natural drinking, is sufficient to unseal the sealing abutment and thereby allow liquid out of the valve assembly.

More specifically, the sealing surface is annular. In this way, the valve element is configured to fit into a cylindrical vessel in any rotational orientation and is also configured to allow a user to drink from any point on the rim of a suitable valve assembly.

In certain embodiments, the rim of the resiliently deformable portion has a smaller outer diameter in the second plane than in the first plane. Thus, the rim is thereby configured to create a reliable seal as the valve element is inserted into a vessel. In other words, and without wishing to be bound by theory, when deformed from the first plane to the second plane, the rim is configured to act like a piston sealing within a cylinder so that the sealing abutment comprises more than just a "point seal" of two annular edges engaging or resting against one another and, instead, comprises two annular faces engaging one another.

More specifically, the outer diameter of the rim in the second plane is smaller than in the first plane by about <NUM>. Thus, the sealing abutment comprises two annular faces engaging one another in such a way as to provide a contact area of significant height. With a reduction in outer diameter of about <NUM> the sealing abutment may be substantially between <NUM> and <NUM> in height, thereby ensuring reliability in preventing leaks and greater resilience to ingress of contaminating particles that would otherwise impede it.

More specifically, the outer diameter of the rim in the first plane is substantially between <NUM> and 74mmm and the outer diameter of the rim in the second plane is substantially between <NUM> and <NUM>. Yet more specifically, the outer diameter of the rim in the first plane is about <NUM> and in the second plane is about <NUM>. In this way, the valve element is configured to fit within vessels sized appropriately for children or infants and with a sealing abutment appropriately sensitive to their drinking action.

In certain embodiments, in the first plane the rim is at an angle <NUM>-<NUM>° to the horizontal and in the second plane the rim is deformed to an angle <NUM>-<NUM>° to the horizontal. More specifically, in the first plane, the rim is angled at an angle of substantially <NUM>° to the horizontal and in the second plane the rim is deformed to an angle of substantially <NUM>°. In this way, the valve element is configured to provide a central depression which provides space for the user's upper lip and nose in order that they are able to drink from the valve assembly in a natural manner. The inward angular deformation of the rim also ensures the resiliently deformable portion is configured to form a reliable sealing abutment with an engagement surface of a vessel to prevent leaks from the vessel. In other words, the angular deformation of the rim is such that it is able to provide a sealing force to resist internal pressure and impact from liquid moving within valve assembly and the seal is substantially more effective than if the rim were simply resting or engaging a vessel lip.

According to a further example not in accordance with the wording of the claims, but considered useful for understanding the invention, a valve assembly is provided comprising:
a vessel for receiving a liquid comprising a lip and an inner wall, and a valve element comprising a body comprising a resiliently deformable portion having a rim, the rim located in a first plane, wherein at least the rim of the resiliently deformable portion is deformed substantially inwardly into a second plane, so as to be located within the vessel inner wall, and further wherein a portion of the rim is lifted out of the second plane upon application of a suction force to an upper surface of a corresponding portion of the resiliently deformable portion.

In certain examples, the inner wall of the vessel comprises an engagement surface. In certain examples the resiliently deformable portion has a lower surface, the lower surface comprising a sealing surface, such that when the rim is in the second plane, the sealing surface provides a sealing abutment with the engagement surface. In this way, the valve element is able to form a leakproof seal within a vessel that is capable of preventing liquid from escaping from a valve assembly, for example when the valve assembly is knocked over.

More specifically, the resiliently deformable portion has an outer edge such that when the rim is in the second plane the outer edge is located not lower than the vessel lip. In this way, when the user drinks from the valve assembly, their mouth seals easily onto the upper surface of a portion of the resiliently deformable portion. As such, the user finds it easy to drink from the valve assembly with a natural drinking action and does not have to alter the angle of the valve assembly in their mouth or how far into their mouth they place the lip in order to unseal a portion of the rim and drink easily. In particular, for infants and young children who are learning to drink from an open cup, the arrangement allows them to learn a "grown-up" drinking style without accidental spills.

According to a further example not in accordance with the wording of the claims, but considered useful for understanding the invention, a valve assembly is provided comprising:
a vessel for receiving a liquid comprising a lip and an inner wall having a first diameter, and a valve element comprising:
a body comprising a resiliently deformable portion having a rim, the rim extending outwardly to a second diameter, wherein the second diameter is larger than the first diameter, wherein at least the rim of the resiliently deformable portion is deformed substantially inwardly to be located within the vessel inner wall, and further wherein a portion of the rim is lifted upon application of a suction force to an upper surface of a corresponding portion of the resiliently deformable portion.

In certain examples, the inner wall of the vessel comprises an engagement surface and a lower surface of the rim comprises a sealing surface. More specifically, the sealing surface provides a sealing abutment with the engagement surface when at least the rim of the resiliently deformable portion is deformed substantially inwardly. In this way, the sealing surface and engagement surface are configured to create a reliable sealing abutment. In other words, the rim is configured to act like a piston sealing within a cylinder so that the sealing abutment comprises more than just a "point seal" of two annular edges engaging or resting against one another and instead comprises two annular faces engaging one another.

In certain examples, the rim of the resiliently deformable portion has an outer edge. More specifically, the outer edge is not lower than the vessel lip when at least the rim of the resiliently deformable portion is deformed substantially inwardly. In this way, when the user drinks from the valve assembly, their mouth seals easily onto the upper surface of a portion of the resiliently deformable portion and is able to drink from the valve assembly with a natural drinking action and position. Furthermore, infants and young children who are learning to drink from an open cup are able to learn a "grown-up" drinking style without accidental spills.

In certain examples, the sealing abutment extends for a distance of <NUM>-<NUM> down the inner wall of the vessel. Thus, the sealing abutment has a vertical height dimension that improves reliability in preventing leaks and resilience to ingress of contaminating particles that would otherwise impede it.

In certain examples, the engagement surface is proximate the lip of the vessel. In this way, the vessel capacity is maximised and the user's mouth can easily contact and apply a suction force to activate the valve assembly.

In certain examples, at least one of the sealing surface and the engagement surface is textured. In this way, it is possible to modify or control the friction between the two surfaces in order to moderate both the resistance to inserting the valve assembly into the vessel, as well as the ease with which portions of the abutment unseal when the user drinks from the valve assembly.

In certain examples, the valve element and / or the vessel comprise attachment means for removably attaching to one another. Such attachment means are known in the art and allow the user to easily assemble the valve assembly and to easily take the valve assembly apart for cleaning or to replace worn or damaged parts.

In certain examples, the vessel is dimensioned to receive the valve element entirely within the diameter of the inner wall. This enables the rim of the valve element to act as piston when received into the vessel and to ensure the sealing abutment is more than a point seal. This arrangement also ensures that the valve element cannot overhang the lip of the vessel such that the sealing abutment cannot be unsealed by accidentally lifting or moving the rim of the valve element.

In certain examples the vessel is substantially cylindrical. In this way, the valve element may be configured so that it fits into a cylindrical vessel in any rotational orientation. Furthermore, the vessel is thereby configured to allow a user to drink from any point on the rim of valve assembly.

According to a further example not in accordance with the wording of the claims, but considered useful for understanding the invention, a method of drinking from a valve assembly is provided.

In certain examples, the rim comprises an outer edge and the vessel comprises a lip. More specifically, in the sealing position, the outer edge of the rim is not lower than the lip. In this way, when the user drinks from the valve assembly, their mouth may seal easily against the upper surface of a portion of the resiliently deformable portion so that they are able to drink from the valve assembly with a natural drinking action and position.

In a further example, the valve element further comprises a baffle. More specifically, upon applying a suction force, the baffle restricts or controls the liquid flowing out of the valve assembly. Consequently, if the valve assembly is knocked over or falls, the baffle is able to prevent the whole volume of liquid from hitting lower the surface of the resiliently deformable portion in a way that would otherwise cause the valve assembly to leak.

Specific examples are now described, by way of example only, with reference to the drawings, in which:.

<FIG> depicts a cross-section of a valve assembly <NUM> in accordance with a first example of the present disclosure. The valve assembly <NUM> comprises a feeding and/or drinking vessel <NUM> and a valve element <NUM>, the valve element <NUM> in turn comprising a sealing cap <NUM> and a cylindrical portion <NUM>.

When the valve element <NUM> is attached to the vessel <NUM>, as shown in <FIG>, the valve assembly <NUM> is formed. The valve assembly <NUM> in the example shown comprises both the vessel <NUM> and the valve element <NUM>. The valve element <NUM> can be removably attached to the feeding and/or drinking vessel <NUM> via attachment means. In the arrangement shown in <FIG>, the cylindrical portion <NUM> has a threaded portion <NUM> on an outer / external surface, which allows the valve element <NUM> to be removably fixed to the vessel <NUM> via interaction with an internally threaded portion <NUM> of the vessel <NUM>. The internally threaded portion <NUM> of the vessel <NUM> and the externally threaded portion <NUM> of the cylindrical portion <NUM> together comprise the attachment means. A screw fit arrangement is formed between the threaded portions. The screw fit provides a water-tight seal between the valve element <NUM> and the vessel <NUM>. It will be appreciated that other suitable attachment means may be used to attach the valve element <NUM> to the vessel <NUM>, for example a bayonet attachment means or a push-fit arrangement.

The sealing cap <NUM> comprises an upper face and has an outer rim <NUM>. The sealing cap <NUM> is bowed, or flared, in cross section. In other words, the upper face curves upwards from a central, relatively flat lowermost surface toward the outer rim <NUM> of the sealing cap <NUM>. In still other words, the upper face can be described as roughly dome-shaped.

The sealing cap <NUM> is connected to the cylindrical portion <NUM> by connecting means. The connecting means allows the passage of fluid therethrough. The cylindrical portion <NUM> is at least partially hollow to form a cylindrical hollow region <NUM>. Fluid may thus flow and be stored inside the cylindrical portion <NUM>.

The connecting means comprises a connecting portion <NUM>. The connecting portion <NUM> extends from the sealing cap <NUM> to the cylindrical portion <NUM>. The connecting portion <NUM> is fixedly attached to an underside of the sealing cap <NUM>. The connecting portion <NUM> may be hollow and cylindrical, and/or may flare radially outwards or radially inwards from the cylindrical portion <NUM> to meet the underside of the sealing cap <NUM>. The cylindrical walls of the connecting portion <NUM> may align with the cylindrical walls of the cylindrical portion <NUM>. The connecting portion <NUM> comprises at least one aperture <NUM>, and in some examples comprises a plurality of apertures <NUM>. The plurality of apertures <NUM> may be arranged in a ring around the circumference of the connecting portion <NUM>. The cylindrical hollow region <NUM> located inside the cylindrical portion <NUM> and the apertures <NUM> of the connecting means allow the formation of a fluid flow path, as will be discussed in detail below. In some examples, the connecting means / connecting portion <NUM> comprises two regions of apertures or gaps (not shown in <FIG>), one apertured region located at or adjacent to an upper region of the connecting portion <NUM> and another apertured region located at, adjacent to and/or directly above the screw thread <NUM>.

In more detail, the first apertured region comprises apertures in the connecting portion <NUM>, the apertures being located / positioned adjacent to the underside of the sealing cap <NUM>. These apertures may be a ring of apertures formed adjacent to the underside of the sealing cap <NUM>. The apertures in the first apertured region may be either located / positioned solely in the region adjacent to the sealing cap <NUM>, or may extend in an axial direction downwards and away from the upper face of the connecting portion <NUM>. In other words, the apertures may extend downward from the section of the connecting portion <NUM> which meets the underside of the sealing cap <NUM>. Because apertures are positioned in an upper region of the connecting portion <NUM>, e.g. a region adjacent to the underside of the sealing cap <NUM>, when the vessel <NUM> is tipped up, a greater amount of liquid can flow through the apertures, and less residual liquid will be trapped in the vessel <NUM>. In other words, less liquid can pool inside the connecting means because apertures are located at an uppermost point of the connecting means.

The second apertured region is located at or adjacent to the screw thread <NUM>. The second apertured region comprises apertures which are located at, adjacent to or directly above the screw thread. Because the apertures are located adjacent to, or at, the screw thread, less liquid can be trapped in the region defined by the upper inner wall of the vessel <NUM> and an outer wall of the connecting portion <NUM>, for example when the vessel <NUM> is inverted and then returned to an upright orientation.

In the example of <FIG>, the connecting means / connecting portion is an upper region of the cylindrical portion <NUM>. In this example, a lower region of the cylindrical portion <NUM> comprises a screw thread, an upper region of the cylindrical portion <NUM> comprises an aperture <NUM> or plurality of apertures <NUM> therein, and the upper region of the cylindrical portion <NUM> fixedly joins, attaches to, and/or is integral with an underside of the sealing cap <NUM>.

The sealing cap <NUM> has an annular lower surface. The annular lower surface can be described as an inner surface, as it faces the inside of the cup or vessel <NUM> when attached to the cup or vessel <NUM>. An annular valve face <NUM> is formed on the lower, or inner, surface of the sealing cap <NUM>. The annular valve face <NUM> is in the form of an annular bead, rib or ridge, which extends from the annular lower surface of the sealing cap <NUM> around the entire circumference of the annular lower surface of the sealing cap <NUM>. The annular valve face <NUM> is preferably rounded on its outer surface, i.e. on the surface which faces the valve seat surface <NUM> as will be described in detail below.

At least one pivotal protrusion <NUM> also extends from the lower surface of the sealing cap <NUM>. In the example of <FIG>, a plurality of pivotal protrusions <NUM> extends from the lower surface of the sealing cap <NUM> at locations around the annular lower surface. The pivotal protrusions <NUM> may be equally spaced, roughly equally spaced, or placed at irregular intervals around the lower surface of the sealing cap <NUM>. The pivotal protrusions <NUM> may be protrusions, projections, and/or extensions, and may take the form of circular protrusions, elongated ridges or ribs, or may be of any other shape or form which allows them to fulfil their function of acting as a pivot, which will be described in detail below. The pivotal protrusions <NUM> are arranged at locations radially outward from the annular valve face <NUM>, but radially inward from the cap outer rim <NUM>. As the sealing cap <NUM> forms part of the valve element <NUM>, the arrangement can be described as follows: the at least one pivotal protrusion 121is arranged on a lower surface of the valve element <NUM>, in between an outer rim <NUM> of the valve element <NUM> and an annular valve face <NUM> of the valve element <NUM>. In still other words, the at least one pivotal protrusion <NUM> and the annular valve face <NUM> are arranged on a common surface of the valve element <NUM>, and that surface terminates at an outer rim <NUM>.

The vessel <NUM> may be a relatively standard drinking vessel <NUM>, having an upper rim <NUM> and means for removably attaching or fixing the valve element <NUM> thereto, such as a screw fit arrangement as described above. The vessel <NUM> also comprises a valve seat surface <NUM> on an inside surface of the vessel <NUM>. The vessel <NUM> flares outwards in its upper region and toward its upper rim <NUM>, so that the diameter of the vessel <NUM> generally increases from an upper region of the vessel <NUM> toward the vessel upper rim <NUM>. The inner surface of the vessel <NUM> in the vicinity of the upper rim <NUM> forms a flared surface <NUM>. The flared surface <NUM> is generally annular and flares upwards and radially outwards, and terminates to form the vessel upper rim <NUM>. In its simplest form, as shown in <FIG>, the valve seat surface <NUM> may simply be the inside surface of the vessel <NUM> in the region of the vessel upper rim <NUM>. In other words, the valve seat surface <NUM> may be formed on the flared surface <NUM>. In this manner, the valve seat surface <NUM> is located on an inner surface of an outwardly flared portion of the vessel upper rim <NUM>. The region of the inside surface of the vessel <NUM> which acts as a valve seat is annular or cylindrical in shape, and comprises the region of the inside surface of the vessel <NUM> which contacts the valve element <NUM>'s annular valve face <NUM> when the valve element <NUM> is attached to the vessel <NUM>. In other examples, the valve seat surface <NUM> may be an annular flange, rim or similar structure which extends from an inside surface of the vessel <NUM>.

The components of the valve assembly <NUM> can be formed in any appropriate manner, for example compression or injection moulding. Suitable manufacturing techniques include forming the components in two-step processes such as co-moulding or over-moulding. The constituent pieces of the valve assembly <NUM> can be formed of any appropriate plastics material. The vessel <NUM> / cup can be formed of any appropriate rigid plastics material, such as thermoplastic materials such as polypropylene PP, polycarbonate PC or similar material blends as appropriate. The sealing cap <NUM> can be formed, at least in part, from any appropriate resilient, flexible material such as silicone, latex or a thermoplastic elastomer (TPE). In the example shown in <FIG>, the sealing cap <NUM> is formed of a rigid plastic in the centre of the upper face, while the outer rim <NUM>, pivotal protrusions <NUM> and annular valve face <NUM> are formed of a soft resilient material. Such a sealing cap <NUM> structure gives structural integrity to the valve assembly <NUM> while allowing for a soft surface which contacts the user's lips. The resilient nature of the material also provides a biasing effect and ensures that the valve remains closed in a rest position, as will be discussed in further detail below.

Turning to the operation of the valve assembly <NUM>, when no force acts on the valve assembly <NUM>, for example no force acts on the sealing cap <NUM> from a user's lips, then the valve assembly <NUM> is in a rest position. The rest position is shown in <FIG>. In the rest position, the annular valve face <NUM> of the sealing member opposes, in other words faces, abuts and/or contacts, the annular valve seat surface <NUM> of the vessel <NUM>. The resilient nature of the sealing cap <NUM> material, at least in the vicinity of the annular valve face <NUM>, ensures that the annular valve face <NUM> is biased toward the annular valve seat surface <NUM>. In other words, the annular valve face <NUM> contacts and presses against the valve seat surface <NUM> to form a seal therebetween. In more general terms, a seal is formed between the vessel <NUM> and the valve element <NUM> such that no fluid flow path can be formed from the inside of the vessel <NUM> to the outside of the vessel <NUM>.

When a user presses his or her lips to the outer rim <NUM> of the valve element <NUM> / sealing cap <NUM> as shown in <FIG>, the sealing cap <NUM> is actuated and the valve opens, forming a fluid flow path from inside the vessel <NUM> to the user's mouth. The valve assembly <NUM> is shown in an open position in <FIG>, along with a possible fluid flow path which may be formed. In more detail, when a user presses his or her lips to the outer rim <NUM> and hence imparts a downward pressure or force to the outer rim <NUM>, the sealing cap <NUM> flexes in the vicinity of the applied force / pressure such that the annular valve face <NUM> moves away from the annular valve seat surface <NUM> via a pivoting movement around those pivotal protrusions <NUM> which are located in the vicinity of the applied pressure / force. In this manner, the pivotal protrusions <NUM> act as pivoting points which allow the valve to open upon the application of contact pressure from a user's lips. In other words, the downward force applied to the outer rim <NUM> of the sealing cap <NUM> by a user is converted into an upward movement of the annular valve face <NUM>, thus lifting the annular valve face <NUM> from the annular valve seat surface <NUM> and unsealing the vessel <NUM>.

In some examples, the pivotal protrusions <NUM> do not contact the vessel <NUM> in the rest position. In other examples, the pivotal protrusions <NUM> do contact the vessel <NUM> in the rest position. In either case, it will be appreciated that the pivotal protrusions <NUM> may still act as pivoting points upon the application of force / pressure to the outer rim <NUM> as described above.

In examples in which the annular valve face <NUM> has a rounded outer edge, an additional rolling effect makes the valve easier to operate and open, and hence allows the valve to be more sensitive. Upon the application of a user's lip pressure to the outer rim <NUM>, the outer region of the sealing cap <NUM> flexes and rolls about the rounded edge of the annular valve face <NUM> as the annular valve face <NUM> contacts the valve seat surface <NUM> vessel inner surface.

When the user wishes to drink from the vessel <NUM>, the valve assembly <NUM>, comprising the vessel <NUM> and valve element <NUM>, is tilted or upended. Liquid in the vessel <NUM> acts under gravity to pass through the hollow region <NUM> of the cylindrical portion <NUM> and through the apertures or gaps in the connecting means. When the user applies pressure to the outer rim <NUM> of the sealing cap <NUM>, as described above the annular valve face <NUM> is lifted from the annular valve seat surface <NUM> via a pivoting movement centred on at least one pivotal protrusion, thus opening the valve in the vicinity of the user's lip pressure. A fluid flow path is thus formed from inside the vessel <NUM> to the user's mouth via the hollow cylindrical region, through the apertures or gaps in the connecting means, and between the valve face <NUM> and valve seat surface <NUM>. This fluid flow path is shown in part in <FIG>.

Lip pressure on a particular point on the cap outer rim <NUM> opens the valve in the vicinity of that particular point. In other words, the lip pressure causes movement of the annular valve face <NUM> in a region local to the lip pressure. In some examples, lip pressure causes movement of the annular valve face <NUM> only in a region local to the lip pressure, while the seal is maintained around the remainder of the annular valve face <NUM> circumference.

Due to the resilient nature of the material comprised in the sealing cap <NUM>, a biasing force is provided between the annular valve face <NUM> and the annular valve seat surface <NUM>. This force acts to press the annular valve face <NUM> against the annular valve seat surface <NUM>. Due to the resilient nature of the material comprised in the sealing cap <NUM> and the biasing force, once the user's lip pressure is removed the annular valve face <NUM> is again moved back toward the annular valve seat surface <NUM>, and the valve assembly <NUM> moves back into the rest position in which the fluid flow path is blocked.

It will be understood that the above description of a specific example is by way of example only and is not intended to limit the scope of the present disclosure. Many modifications of the first example are envisaged and intended to be within the scope of the present disclosure.

For example, it has been appreciated that the pivotal protrusions <NUM> may be located on the inner surface of the vessel <NUM>. Similarly, pivotal protrusions <NUM> may be arranged on both the inner surface of the vessel <NUM> and also on the annular lower surface of the sealing cap <NUM>. These examples operate in a similar manner to example shown in <FIG>. When a user presses down on the outer rim <NUM>, the pivotal protrusions <NUM> of the vessel <NUM> contact the lower surface of the sealing cap <NUM> at a contact region which is located between the outer rim <NUM> and the annular valve face <NUM>. In this manner, the pivotal protrusions <NUM> can actuate the sealing cap <NUM> and effect a pivoting movement in a manner similar to that described above.

<FIG> and <FIG> show a second example of a valve assembly <NUM> in accordance with the present disclosure. The skilled person will appreciate that there are similarities between the first and second examples, and descriptions given above for components of the first example generally apply also to the components of the second example except where explicitly stated below. Like-reference numerals are used to depict like-components in the figures.

<FIG> depicts a cross-section of a valve assembly <NUM>. The valve assembly <NUM> is formed from a valve element <NUM> and a vessel <NUM>. As with the first example, the valve element <NUM> comprises a sealing cap <NUM> and a cylindrical portion <NUM>. The cylindrical portion <NUM> has a hollow interior portion <NUM> and is connected to the sealing cap <NUM> via connecting means in a manner similar to the first example. As with example <NUM>, the vessel <NUM> comprises an upper rim <NUM>, a flared surface <NUM>, and an interior region for storing liquid.

In the second example, the vessel <NUM> has a sealing member <NUM>. The sealing member <NUM> is an insert which fits inside the vessel <NUM>. The sealing member <NUM> is coaxial with, and fits inside, the vessel <NUM>. The sealing member <NUM> extends from an inner surface of the vessel <NUM>. In more detail, the sealing member extends from the flared surface <NUM> of the vessel <NUM>. The sealing member <NUM> has an outer rim <NUM>, a valve face surface <NUM>, and is fixed to the vessel <NUM>. In some examples the sealing member <NUM> is removably fixed to the vessel <NUM>, and in other examples the sealing member <NUM> is integral with the vessel <NUM>. In the example shown in the figures, the sealing member <NUM> is integral with the vessel <NUM>, being co-moulded to a top region of an inner wall of the vessel <NUM>.

As described above in relation to the first example, the vessel <NUM> flares outwards in its upper region, so that the diameter of the vessel <NUM> generally increases from an upper region of the vessel <NUM> toward the vessel upper rim <NUM>. As shown in <FIG>, the sealing member <NUM>, and hence the valve face surface <NUM>, is located adjacent to and inside the flared top region of the vessel <NUM> in the vicinity of the vessel upper rim <NUM>. In other words, the valve face surface <NUM> is located adjacent to, and radially inwards from, an inner surface of an outwardly flared portion of the vessel upper rim <NUM>.

As will be appreciated by the skilled person, provided that the sealing member <NUM> comprises a valve face surface <NUM> which allows the functionality described below, the sealing member <NUM> can take numerous forms. The particular sealing member <NUM> shown in <FIG> has two main elements: the first extending upwardly from an inner surface of the vessel <NUM> and the second extending upwardly and radially outwardly from the first element. The second element extends upwardly from the first element and terminates to form an outer rim <NUM> of the sealing member <NUM>. In other words, the sealing member <NUM> comprises a flared portion which flares upwards and radially outwards, and the flared portion of the sealing member <NUM> extends parallel with and adjacent to the flared portion of the vessel <NUM>. The radially inner surface of the second element, i.e. the inner surface of the outwardly and upwardly flared portion of the sealing member <NUM>, forms a valve face surface <NUM>. It will therefore be appreciated that the outer rim <NUM> of the sealing member <NUM> is also the outer rim <NUM> of the annular valve face surface <NUM>. The upper rim <NUM> of the vessel <NUM> and the outer rim <NUM> of the sealing member <NUM> are located adjacent and/or next to each other such that a user can use his lips to press the outer rim <NUM> of the sealing member <NUM> toward the vessel upper rim <NUM>, as will be described in more detail below.

The valve element <NUM> is generally shaped and structured in the manner described above in relation to the first example. The upper face of the sealing cap <NUM> extends radially outward and upward toward the outer rim <NUM> of the sealing cap <NUM>. However, in the second example, the lower surface <NUM> of the sealing cap <NUM> forms an annular valve seat <NUM> surface, and in particular a lower surface of the outer rim <NUM> of the sealing cap <NUM> forms an annular valve seat <NUM> surface. In other words, the valve element <NUM> has an outer rim <NUM> which comprises a valve seat <NUM>.

The pivotal protrusions <NUM> and the annular valve face described above in relation to the first example are not necessarily required. However, it will be appreciated that a valve assembly <NUM> which comprises the sealing member of the second example and the valve element <NUM> of the first example is an effective valve assembly <NUM> which benefits from the advantages described in relation to both examples.

As with the valve assembly <NUM> of the first example, the components of the valve assembly <NUM> of the second example can be formed in any appropriate manner, for example compression or injection moulding. Suitable manufacturing techniques include forming the components in two-step processes such as co-moulding or over-moulding. The sealing cap <NUM> of the second example may comprise a resilient, flexible material such as silicone, latex or a thermoplastic elastomer (TPE). However, in the example shown in <FIG>, the sealing cap <NUM> is formed entirely of a rigid plastic material. Such a sealing cap <NUM> structure gives structural integrity to the valve assembly <NUM>. At least the element of the sealing member <NUM> which forms the annular valve face surface <NUM> may be comprised of a resilient flexible material. Alternatively, all of the sealing member <NUM> may be formed of such a material. The resilient nature of the material provides a biasing effect and ensures that the valve remains closed in a rest position, as will be discussed in further detail below.

Turning to the operation of the valve assembly <NUM> of the second example, when the valve element <NUM> is screwed down onto the vessel <NUM>, an inner, lower surface <NUM> of the sealing cap <NUM> presses against the annular valve face of the sealing member <NUM>. As the sealing cap <NUM> is screwed down, a seal is formed between the annular valve seat <NUM> surface of the sealing cap <NUM> and the annular valve face surface <NUM> of the sealing member <NUM>. Due to the resilient nature of the material forming the annular valve face surface <NUM>, the annular valve face surface <NUM> is biased toward and against the valve seat <NUM> surface. In other words, the annular valve face surface <NUM> contacts and presses against the valve seat <NUM> surface to form a seal therebetween. In more general terms, a seal is formed between the sealing member/ vessel <NUM> and the sealing cap <NUM> such that no fluid flow path can be formed from the inside the vessel <NUM> to the outside of the vessel <NUM>.

When no force acts on the valve assembly <NUM>, for example no force acts on the sealing cap <NUM> from a user's lips, then the valve is closed and the valve assembly <NUM> is in a rest position. The rest position is shown in <FIG>. When a user presses his or her lips to the outer rim <NUM> of the sealing member <NUM> as shown in <FIG>, the sealing member <NUM> is actuated and the valve opens, forming a fluid flow path from inside the vessel <NUM> to the user's mouth. The valve assembly <NUM> is shown in an open position in <FIG>, along with a possible fluid flow path which may be formed. In more detail, when a user presses his or her lips to the outer rim <NUM> of the valve face surface <NUM> / sealing member <NUM> and hence imparts a downward pressure or force to the outer rim <NUM>, the annular valve face surface <NUM> flexes away from the annular valve seat <NUM>. In other words, the downward force applied to the outer rim <NUM> of the sealing member <NUM> causes the outer rim <NUM> of the sealing member <NUM> to move toward the inside wall of the vessel <NUM> in the vicinity of the user's lip pressure. Thus, the annular valve face surface <NUM> moves away from the valve seat <NUM>, and thus a possible fluid flow path is formed.

In a manner similar to example <NUM>, lip pressure on a particular point on the sealing member <NUM> outer rim <NUM> opens the valve in the vicinity of that particular point. In other words, the lip pressure causes movement of the annular valve face in a region local to the lip pressure. In some examples, lip pressure causes movement of the annular valve face surface <NUM> only in a region local to the lip pressure, while the seal is maintained around the remainder of the circumference of the annular valve face.

In a similar manner to that described above in relation to the first example, when the user wishes to drink from the vessel <NUM>, the valve assembly <NUM> comprising the vessel <NUM> and sealing cap <NUM> is tilted or upended. Liquid in the vessel <NUM> acts under gravity to pass through the cylindrical hollow region <NUM> of the cylindrical portion <NUM> and through the apertures or gaps in the connecting means. When the user applies pressure to the outer rim <NUM> of the sealing cap <NUM>, as described above the annular valve face surface <NUM> is moved away from the annular valve seat <NUM> in the vicinity of the user's lip pressure, thus opening the valve. A fluid flow path is thus formed from inside the vessel <NUM> to the user's mouth via the hollow cylindrical region <NUM>, through the one or more apertures or gaps in the connecting means, and between the valve face surface <NUM> and valve seat <NUM> in the vicinity of the user's lip pressure. This fluid flow path is shown in part in <FIG>.

Due to the resilient nature of the material comprising the sealing member <NUM>, once the user's lip pressure is removed the annular valve face is again moved back toward the annular valve seat <NUM> surface, and the valve assembly <NUM> moves back into the rest position in which the fluid flow path is blocked.

As described above, the sealing member <NUM> is coaxial with and fits inside the vessel <NUM>, and is attached to the vessel <NUM> in a region near the upper rim <NUM> of the vessel <NUM>. In the examples shown in <FIG> and <FIG>, the sealing member <NUM> extends, and flares, outward substantially parallel to the upper rim <NUM> of the vessel <NUM> in the vicinity of the vessel upper rim <NUM>. Because this extending region of the sealing member <NUM> comprises the annular valve face surface <NUM>, it can also be said that the annular valve face surface <NUM> extends substantially parallel to the vessel upper rim <NUM>.

Because the sealing member <NUM>, and hence the annular valve face, fits inside the vessel <NUM> and extends adjacent to the vessel upper rim <NUM> in this manner, the region of the vessel <NUM> near the upper rim <NUM> protects the valve face surface <NUM> from forces which impact the side of the vessel <NUM>. For example, if a user drops the valve assembly <NUM>, the soft resilient material of the valve face surface <NUM> / sealing member <NUM> is protected by the rigid plastic material of the cup. Because of the protection afforded by the vessel <NUM>, the valve can be made to be sensitive to a user's lip pressure without being subject to leaks caused by dropping the valve assembly <NUM>.

Having the annular valve face surface <NUM> extend inside and adjacent to the vessel upper rim <NUM> is also advantageous for other reasons. It is easier for a user to operate a valve using lip pressure by placing their lower lip on the rigid surface of the outside of the vessel upper rim <NUM>, and their upper lip on the annular valve face surface <NUM>. The valve face surface <NUM> can then be easily pressed against the inside of the vessel upper rim <NUM> to open the valve.

It will be understood that the above description of a specific second example is by way of example only and is not intended to limit the scope of the present disclosure. Many modifications of the second example, some of which are now described, are envisaged and intended to be within the scope of the present disclosure.

It will be appreciated that the vessel <NUM> and valve assembly <NUM> could be structured so as to remove the need for a sealing member <NUM>. Instead, a region of the vessel <NUM> in the vicinity of the vessel <NUM> upper rim <NUM> could be formed of a resiliently flexible material in order to form a valve face. When the valve element <NUM> is screwed down onto the vessel <NUM> in such an example, the part of the outer rim <NUM> of the sealing cap <NUM> which forms the valve seat <NUM> is pressed against the resilient material of the vessel <NUM> rim in order to form a seal. The user can use pressure from his/her lips to open the valve in a similar manner to that described above.

<FIG> shows a cross section of a valve assembly <NUM> according to a third example. As with the previously described examples, the valve assembly <NUM> comprises a valve element <NUM> and a vessel <NUM>. The valve element has a cylindrical portion <NUM> and a sealing cap <NUM>. The sealing cap <NUM> comprises a cap upper face connected to a flared portion <NUM>. The sealing cap <NUM> and cylindrical portion <NUM> are connected via connecting means. Preferably, the valve element is integral such that the sealing cap <NUM>, connecting means, and cylindrical portion form one integral valve component.

The vessel <NUM> is a relatively standard vessel or cup, but has an outwardly flared region terminating at an upper rim <NUM>. In other words, the vessel outwardly flared region extends both upwardly and radially outwardly toward the vessel upper rim <NUM>. In still other words, the diameter of the vessel <NUM> generally increases from an upper region of the vessel <NUM> toward the vessel upper rim <NUM>. The vessel outwardly flared region comprises a flared surface <NUM>. The flared surface <NUM> is a generally annular surface, and is formed on the vessel inner wall in the vicinity of the vessel upper rim <NUM>. In the example shown in <FIG>, the flared region of the vessel wall extends substantially from the attachment means, in this case the screw thread of the vessel, toward the vessel upper rim <NUM>. The outwardly flared region may also be described as an outwardly flared portion or an outwardly flared rim.

The cylindrical portion <NUM> of the valve element <NUM> comprises an externally threaded portion which co-operates with a corresponding internally threaded portion of the vessel <NUM> in order to from a screw fit. As with the previously described examples, the screw fit may be replaced with any appropriate attachment means, such as a bayonet fitting, a rib and mating groove or a push-fit mechanism. The cylindrical portion is hollow, such that liquid can flow and be stored inside the cylindrical portion.

The sealing cap <NUM> has an upper face. The upper face is preferably circular. The flared portion <NUM> of the sealing cap <NUM> extends upwards and radially outwards from the upper face, and is roughly frustoconically shaped. The flared portion <NUM> of the sealing cap <NUM> is more outwardly flared than the flared surface <NUM>. In other words, the gradient of the sealing cap flare is greater than the gradient of the flared surface.

The sealing cap <NUM> is sized and configured to at least partially fit inside the vessel <NUM>, as shown in <FIG>. When the sealing cap <NUM> is attached to the vessel <NUM> via the screw fit as shown in <FIG>, the cap upper face fits inside the vessel <NUM> such that the outer perimeter or circumference of the upper face is located at a position radially inwards from the flared surface <NUM> of the vessel <NUM>. The difference in flare gradient between the flared portion <NUM> of the sealing cap <NUM> and the flared surface <NUM> of the vessel <NUM> means that, while the flared potion of the sealing cap <NUM> begins to flare outward at a position radially inwards from the flared surface <NUM> / flared portion of the vessel <NUM>, the flared portion <NUM> flares upwards and outwards to meet the flared surface <NUM>. In other words, the flared portion <NUM> of the sealing cap <NUM> flares outwards more than the vessel upper rim <NUM> flares outwards, such that the flared portion <NUM> contacts an inner surface of the vessel around the circumference of the vessel.

In still other words, the cup or vessel <NUM> flares outward toward its upper rim <NUM>, forming a flared surface on an inner surface of the vessel. The valve element <NUM> has a flared portion <NUM> which also flares outward. The flared portion <NUM> flares outward to a greater degree than the vessel <NUM>. In more detail, the outer rim <NUM> of the flared portion <NUM> meets an inner surface of the vessel <NUM>, where the inner surface is at, or adjacent to, the upper rim <NUM>.

In some examples, the flared portion <NUM> meets the flared surface of the vessel along, at, or adjacent to the upper rim <NUM> of the vessel. In some examples, such as the one shown in <FIG>, the sealing cap flared portion <NUM>, flares outwards to meet the upper rim <NUM> of the vessel <NUM>. In other words, in such example, when the valve element is attached to, and located at least partially inside, the vessel <NUM>, the flared portion <NUM> and the vessel <NUM> meet at their respective rims.

Both the flared surface <NUM> of the vessel <NUM> and the flared portion <NUM> of the valve element <NUM> flare upwards, in relation to the vessel in an upright orientation, and radially outwards. As such, the flared portion <NUM> and flared surface <NUM> extend in a direction away from a central axis of the vessel. <FIG> defines an angle θa, and <FIG> defines an angle θb. θa defines an angles of flare between a horizontal surface, e.g. the upper face of the sealing cap, and the flared portion <NUM>. θb defines an angles of flare between a horizontal surface, e.g. the upper face of the sealing cap, and the flared surface <NUM>. As the flared portion extends toward its outer rim <NUM>, angle θa increases at a first rate of change. As the flared surface extends toward its upper rim <NUM>, angle θb increases at a second rate of change. In other words, and with reference to <FIG>, it will be appreciated that as the vessel and flared portion extend upwards, the first rate of change, i.e. the rate of change of angle θa is greater than the second rate of change, i.e. the change of angle θb.

In the example of <FIG>, a hollow chamber is formed between a radially outer surface of the sealing cap flared portion <NUM> and the flared surface <NUM> of the vessel. The radially outer surface of the flared portion <NUM> can be described as a lower surface of the flared portion <NUM>, and is the surface which faces the flared surface <NUM> when the valve assembly is in an assembled configuration. The chamber is roughly annular. The chamber allows fluid to flow therethrough. The size of the chamber and/or gap between the flared surface <NUM> and the flared portion <NUM> can be varied. In some examples, the flared portion <NUM> may extend along some or a majority of the flared surface <NUM>. In such examples, the flared surface <NUM> and/or an outer surface of the flared portion <NUM> are provided with ribs and/or extensions and/or grooves. These features act to ensure that a fluid flow path can be formed between the flared surface <NUM> and the flared portion <NUM>.

The connecting means of the third example is similar to, and may be identical to, the connecting means described above. As with the connecting means described above, the connecting means <NUM> comprises a cylindrical connecting portion <NUM> which comprises at least one aperture <NUM>, and preferably a plurality of apertures <NUM> positioned around its circumference. Additionally or alternatively, the connecting means may comprise mesh regions as described below. The apertures <NUM> of the connecting region are configured to provide a fluid flow path between the inside of the vessel <NUM> to the annular hollow chamber.

The valve assembly <NUM> components can be manufactured and assembled according to the methods described above. The flared portion <NUM> of the sealing cap <NUM> / valve element comprises resilient flexible material. The resilient, flexible material may form the outer rim <NUM> of the flared portion <NUM>, or the flared portion <NUM> may be entirely comprised of the resilient, flexible material. In a preferred example, the cylindrical portion and cap upper face are formed of rigid plastic material, as is the vessel <NUM>. In other examples, the valve element as a whole is completely formed of resilient, flexible material. In such examples, the attachment means between the valve element <NUM> and vessel <NUM> may be a push-fit or bayonet fitting arrangement.

<FIG> shows the valve element attached to the vessel <NUM> and shows the valve assembly <NUM> in a rest position, i.e. a user is not trying to drink from the cup and the valve is closed. The flared portion <NUM> of the sealing cap <NUM> / valve element <NUM> is configured such that, when the valve element is attached to the vessel <NUM>, the outer rim <NUM> of the flared portion <NUM> of the sealing cap <NUM> / valve element presses against an inner surface of the vessel <NUM> in the vicinity of the upper rim <NUM> of the vessel <NUM>. The flared portion <NUM> of the valve element / sealing cap <NUM> flares outwards to meet, and press against, an inner surface of the upper rim <NUM> of the vessel <NUM> to form a seal therewith.

In other words, the outer rim <NUM> of the flared portion <NUM> comprises an annular valve face. In particular, a lower surface of the outer rim <NUM> of the flared portion <NUM> forms an annular valve face. The annular valve face presses against an inner surface of the vessel <NUM>. In this manner, the inner surface of the vessel <NUM> comprises a valve seat surface. The flared portion <NUM> of the sealing cap <NUM> is formed of resilient, flexible material at least around its outer periphery or circumference, and the resilient nature of the material biases the annular valve face against the annular valve seat surface.

When a user wishes to drink from the valve assembly <NUM>, he or she at least partially inverts the valve assembly <NUM> so that liquid flows from the vessel <NUM>, through the apertures <NUM> of the connecting means and into the chamber. The user then applies suction to the outer rim <NUM> of the flared portion <NUM>, causing the annular valve face to lift upwards and away from the annular valve seat surface, allowing liquid to flow from the chamber, through the gap formed between the annular valve face and the annular valve seat surface in the vicinity of the user's mouth, and into the user's mouth.

In more detail, when a user applies suction to the outer rim <NUM> of the flared portion <NUM> of the sealing cap <NUM>, this causes the resilient flexible material of the flared portion <NUM> to flex and/or invert in the vicinity of the user's lips, thus lifting the annular valve face away from the annular valve seat. As with the examples described above, the valve face is configured to lift or move away from the valve seat surface only in the vicinity of the user's lips, with the valve face remaining pressed against the valve seat around the remainder of the periphery of the annular valve face.

When the user stops sucking on the outer rim <NUM> of the flared portion <NUM>, and thereby stops applying negative pressure to the outer rim <NUM>, the valve assembly <NUM> reverts to a rest position in which the annular valve face is pressed, i.e. biased, against the annular valve seat surface.

Alternatively, the valve assembly of the third example can be configured to open in response to a user's lip pressure. In such an example, the user would use their lips to push the outer rim <NUM> of the flared region <NUM> away from the vessel upper rim <NUM>, thus opening the seal in the vicinity of the user's lip pressure. In such an example, the outer rim <NUM> of the flared portion <NUM> is configured to deform from its rest shape upon the application of pressure from a user's lips, such that the outer rim <NUM> lifts from the flared surface <NUM>, i.e. such that the valve face is lifted from the valve seat, thus opening the valve. The flared portion <NUM> can be configured to deform in different ways upon the application of pressure from a user's lips. For example, the outer rim <NUM> can be configured to roll backwards and/or partially invert upon the application of pressure. The flared portion <NUM> can be configured to roll, fold, and/or crease in response to pressure on the outer rim <NUM>, and/or in response to the user pressing the outer rim <NUM> down and along the flared surface <NUM>.

Alternatively or additionally, a lower surface of the flared portion <NUM> may comprise pivotal protrusions in the manner described above in relation to the first example. In such an example, a lower surface of the flared portion <NUM> comprises a projecting annular valve face and at least one pivotal protrusion. The pivotal protrusion is arranged between the outer rim <NUM> and valve face. This arrangement allows a user to apply pressure to the outer rim <NUM> to open the valve. To open the valve, a user presses down on the outer rim <NUM>, causing it to move toward the flared surface <NUM>. As the movement continues, the at least one pivotal protrusion contacts the flared surface <NUM>, and the valve face moves away from the valve seat via a pivoting movement around the at least one pivotal protrusion, thus opening the valve.

It will be understood that the above description of a specific valve assemblies, vessels and valve elements is by way of example only and is not intended to limit the scope of the present disclosure. Many modifications of the second example, some of which are now described, are envisaged and intended to be within the scope of the present disclosure.

Although a particular connecting means structure has been described above, it will be appreciated that the connecting means may take a variety of forms while allowing the operation of the valve assembly as described above. For example, the connecting means may comprise a plurality of ribs which connect the sealing cap and cylindrical portion, the ribs having gaps therebetween to allow the passage of fluid therethrough. The connecting means may instead, or additionally, comprise a connecting region which has a plurality of apertures therein to allow the passage of fluid. The connecting means may additionally, or alternatively, comprise a mesh region or mesh regions. For example, mesh regions could be provided between each of the ribs of a plurality of ribs. In such a connection means, the ribs provide structural integrity, whilst the mesh region regulates the flow rate of fluid flowing through the connecting means. The mesh region may instead comprise the entire connecting means, and in such a connecting means the mesh region is preferably comprised of a rigid plastic mesh or grill. The size of the apertures of the mesh and/or between the ribs can be adjusted by the manufacturer in order to regulate the fluid flow rate through the connecting means. The skilled person will appreciate that the connecting means may take many forms, provided that the connection means allows for the sealing cap and cylindrical portion to be connected, preferably rigidly connected, whilst also allowing a fluid flow path to be formed from the vessel and into a user's mouth as described above.

<FIG> and <FIG> depict an exploded view of a valve assembly <NUM> in accordance with a first embodiment of the invention. The valve assembly comprises a valve element <NUM> and a vessel <NUM>. The vessel <NUM> is substantially cylindrical and comprises volume for receiving liquid defined by a base <NUM> and an inner wall <NUM> extending upwards from the base <NUM> terminating at a lip <NUM>.

The inner wall <NUM> comprises several vertical ribs <NUM> which extend down the inner wall <NUM> from a position proximate the lip <NUM> away from the lip <NUM> towards the base <NUM> and terminating at a lower edge <NUM>. Each lower edge <NUM> is located equidistant above a circumferential shoulder <NUM> in inner wall <NUM> which shoulder <NUM> projects inwardly from the inner wall <NUM>.

The valve element <NUM> comprises a baffle <NUM> and a body <NUM>. The body <NUM> comprises a central portion <NUM> with a handle <NUM> projecting upwards therefrom. The handle <NUM> has a rounded rectangular profile but may be any suitable shape that enables the user to easily grip the valve element <NUM> and insert it into the vessel <NUM>.

The body <NUM> further comprises a resiliently deformable portion <NUM> extending towards a rim <NUM> and terminating at an outer edge <NUM>. The resiliently deformable portion <NUM>, including the rim <NUM> and outer edge <NUM> is arranged in a substantially frustoconical shape or plane, said frustoconical shape extending upwardly and outwardly from the central portion <NUM>.

The baffle <NUM> comprises an annular disc <NUM>. As shown in more detail in the cross-section view of <FIG>, the annular disc has an axial pin <NUM> projecting vertically from its upper surface. In this embodiment the axial pin is moulded to and forms the core of the handle <NUM> of the body <NUM>.

As shown in <FIG>, a number of cut-out portions <NUM> are arranged around the perimeter of the annular disc <NUM>. The cut-out portions <NUM> correspond to openings extending through the axial thickness of the annular disc <NUM> and sized to have a radius to the apex of each opening larger than the protrusion distance of the vertical ribs <NUM> inwardly of the vessel inner wall <NUM>.

Also arranged around the perimeter of the annular disc <NUM> are pairs of bosses 635a and 635b. The bosses project vertically upwards a few millimetres from the upper surface of the annular disc <NUM>. One of each pair of bosses is located on either side of a cut-portion <NUM>. The first boss 635a of each pair is located directly adjacent a first side of one cut-out portion <NUM>. The second boss 635b is not located directly adjacent the opposing side of the same cut-out portion <NUM> but is instead located a short distance further around the annular disc <NUM> perimeter. Located between the second boss 635b and the opposing side of the cut-out portion is a locking area <NUM>.

The resiliently deformable portion <NUM> comprises a frustoconical shape with a lower region extending upwards and outwards from the central portion <NUM> substantially at angle of <NUM>° to the horizontal. At its lower circumference the resiliently deformable portion <NUM> comprises a wall thickness of approximately <NUM>, tapering to a wall thickness of approximately <NUM> at its upper circumference.

The rim <NUM> comprises an upper surface <NUM> and a lower surface <NUM>. The rim <NUM> extends from the upper circumference of the resiliently deformable portion <NUM>, of diameter approximately <NUM>, to an outer edge <NUM> of diameter approximately <NUM>.

The lower surface <NUM> of the rim <NUM> is angled substantially at an angle of <NUM>° to the horizontal while the upper surface <NUM> is angled at a more acute angle. In other words, the angle of the upper surface <NUM> is closer to the horizontal than the lower surface <NUM>. Consequently, the rim <NUM> tapers as it extends outward from the upper circumference of the resiliently deformable portion <NUM>, decreasing in thickness towards the outer edge <NUM> to a thickness of <NUM> at the outer edge <NUM>.

Turning to the assembly of the valve assembly, <FIG> shows the valve element <NUM> coaxial with and partially inserted into the vessel <NUM>. The annular disc <NUM> of the baffle <NUM> has a diameter less than the inner wall <NUM> but larger than the diameter of the circumferential shoulder <NUM> thereby allowing the valve element <NUM> to be inserted cleanly into the vessel <NUM> until the lower face of its annular disc <NUM> engages and rests on the circumferential shoulder <NUM>.

In contrast, the outer edge <NUM> extends outwardly to a diameter larger than that of the inner wall <NUM>. In the example shown, the rim <NUM> extends to an outer edge <NUM> of diameter <NUM> compared to the diameter of <NUM> of the inner wall <NUM> proximate the lip <NUM>. It will be understood that other suitable diameters of the vessel <NUM> and valve assembly <NUM> are envisaged.

<FIG> shows a close-up view of circled region A of <FIG> to illustrate the different diameters more clearly. As explained above, the body <NUM> of the valve element <NUM> has a rim <NUM> arranged in a plane. In the partially inserted position of <FIG>, the valve element <NUM> is coaxial within the vessel <NUM> such that the rim <NUM> and the plane it is located in extend radially beyond the inner wall <NUM> and lip <NUM> of the vessel <NUM>.

Located on the vessel inner wall <NUM> and arranged in an annular path therearound is an engagement surface <NUM>. The engagement surface <NUM> is proximate the lip <NUM>, extending several millimetres down the inner wall <NUM>.

Located on the lower surface <NUM> of the rim <NUM> and arranged in an annular path therearound is a sealing surface <NUM>. The sealing surface <NUM> is proximate the outer edge <NUM>, extending inwardly therefrom.

With the valve element <NUM> only partially inserted, the rim <NUM> is not deformed. However, as the valve element <NUM> is inserted into the vessel <NUM> in the direction of the arrow B, the rim <NUM> engages with first the lip <NUM> and then the inner wall <NUM> deforming the rim <NUM> inwardly to enable it to locate within the vessel <NUM> in a sealing position shown in <FIG>. Because the wall thickness of the rim <NUM> is substantially less than lower portion of the resiliently deformable portion <NUM>, the rim <NUM> deforms preferentially as the valve element <NUM> is inserted into the vessel <NUM>.

Once in the sealing position, the sealing surface <NUM> forms a sealing abutment with the engagement surface <NUM>. The diameter of the outer edge <NUM> and the thickness of the rim <NUM> ensures that the rim <NUM> is able to deform inwardly to an angle to closely conform to the angle of the inner wall <NUM>. As the angle of the engagement surface <NUM> is substantially vertical then the angle of the sealing surface <NUM> is also substantially vertical. In this way, the sealing abutment comprises more than just a "point seal" of two annular edges engaging or resting against one another and instead comprises two annular faces engaging one another. Consequently, the sealing abutment comprises an annular seal extending with a significant height down the inner wall <NUM>. Such a seal offers considerably more reliability in preventing leaks and is more resilient to ingress of contaminating particles that would otherwise prevent the sealing surface <NUM> engaging and sealing with the engagement surface <NUM>.

In the sealing position, the rim <NUM> is located in a second plane so that the outer edge <NUM> sits above the sealing surface <NUM>. In this second plane the rim is now deformed out of the first plane and also out of the plane of the inner surface of the remaining portion of the resiliently deformable portion <NUM> which remains substantially in its original plane. In other words, in going from the arrangement in <FIG> to the arrangement in <FIG>, the outer surface <NUM> of rim <NUM> is deformed from being substantially co-planar with the inner surface of the remaining portion of the frustoconical resiliently deformable portion <NUM> to being in a second plane and the sealing surface <NUM> being substantially cylindrical.

The arrangement in <FIG> shows that the rim <NUM> is moulded substantially co-planar with the remaining portion of resiliently deformable portion <NUM> so that together both form a frustoconical shape. However, other arrangements are possible wherein the rim <NUM> and the remaining portion of resiliently deformable portion <NUM> are not moulded to be co-planar, for example the remaining portion of the resiliently deformable portion <NUM> is horizontal and the rim <NUM> is arranged at an angle to it. Or, the rim <NUM> is moulded horizontal and the remaining portion of the resiliently deformable portion <NUM> is not horizontal. An arrangement such as the latter is shown in <FIG> and may be suitable where the engagement surface <NUM>' of the inner wall <NUM>' is substantially flared and the moulded angles of the resiliently deformable portion <NUM>' and its rim <NUM>' are chosen to ensure the rim <NUM>' is deformed sufficiently to create a sealing abutment as the valve element <NUM>'is inserted into the vessel <NUM>' in direction of the arrow B'.

<FIG> shows a close-up of the valve element <NUM> in a further, drinking position. In this position, a portion of the rim <NUM> is lifted by the action of a suction force applied to the upper surface <NUM> of the same portion of the resiliently deformable portion <NUM>. With the portion of the rim <NUM> being so lifted, a portion of the outer edge <NUM> is separated from the lip <NUM> causing a portion of the sealing abutment to unseal. In other words, suction applied to a portion of the upper surface <NUM> causes a corresponding portion of the sealing surface <NUM> to separate and unseal from a portion of the engagement surface <NUM>. The lifting action created by the suction force on a portion of the resiliently deformable portion <NUM> lifts at least a corresponding portion of the rim <NUM> out of its second plane.

When the user wishes to use the valve assembly <NUM>, the valve element <NUM> is detached from the vessel <NUM> so that liquid can be poured inside. The valve element <NUM> is then inserted into the vessel <NUM> until the annular disc <NUM> engages the circumferential shoulder <NUM> and can be locked to the vessel <NUM> by a relative rotation. With the valve element <NUM> thus inserted, the rim <NUM> is deformed substantially inwardly such that the sealing surface <NUM> forms a sealing abutment with the engagement surface <NUM> on the inner wall <NUM> of the vessel <NUM>. Thus formed, the sealing abutment is able to prevent liquid from spilling from the valve assembly <NUM> until the user wants to take a drink.

When the user wants to take a drink from the vessel <NUM>, the valve assembly <NUM> comprising the vessel <NUM> and the valve element <NUM> is deliberately tilted or upended. Liquid in the vessel <NUM> acts under gravity to flow through one or more of the cut-out portions <NUM> of the annular disc <NUM> until it reaches the lower surface <NUM> of the resiliently deformable portion <NUM>. At this point, in the absence of other actions, the liquid is retained within the vessel <NUM> by the sealing abutment.

When the user places their mouth around a portion of the lip <NUM> of the vessel <NUM> they are able to form an airtight seal between their upper lip and the upper surface <NUM> of a portion of rim <NUM>. The user then gently sucks, in a manner akin to drinking from an open cup, causing at least the portion of the rim sealed by the upper lip to lift and unseal a corresponding portion of the sealing abutment. With this portion of the sealing abutment unsealed, the liquid can flow out of the vessel <NUM> into the user's mouth.

When the user wants to stop drinking, they simply stop sucking or begin to take their mouth away from the valve assembly <NUM>, breaking the seal of their upper lip and the upper surface <NUM>. Either action removes the suction force from the portion of the resiliently deformable portion <NUM> thereby allowing it to revert back to the sealing position. In other words, the resilient nature of resiliently deformable portion ensures that a complete sealing abutment is re-engaged around the inner wall <NUM>.

The components of the valve assembly <NUM> can be formed in any appropriate manner, for example compression or injection moulding. Suitable manufacturing techniques include forming the components in two-step processes such as co-moulding or over-moulding. The constituent pieces of the valve assembly <NUM> can be formed of any appropriate polymeric material. The vessel <NUM> and baffle <NUM> can be formed of any appropriate rigid plastics material, such as thermoplastic materials such as polypropylene PP, polycarbonate PC, polyphenylsulfone PPSU, glass-filled nylon, or similar material blends as appropriate. The vessel <NUM> and the baffle <NUM> are not necessarily formed from the same material. The body <NUM> can be formed, at least in part, from any appropriate resilient, flexible material such as silicone rubber, thermoplastic elastomer (TPE), ethylene propylene diene, styrene butadiene or polyurethane. In the embodiment shown in <FIG>, the vessel is formed of polypropylene, the baffle <NUM> is formed of a glass-filled nylon, while the remaining components of the body <NUM>, including the resiliently deformable portion <NUM> and the rim <NUM> are formed of a flexible silicone rubber of hardness Shore A <NUM>-<NUM>. Such a silicone rubber provides a deformable rim while allowing for a soft surface which contacts the user's lips. The resilient nature of the material also provides a biasing effect and ensures that the sealing abutment remains in a sealing position, as discussed above.

It will be understood that the above description of a specific embodiment is by way of example only and is not intended to limit the scope of the invention as defined by the claims.

As the present embodiment comprises a cylindrical vessel <NUM> and an annular rim <NUM> then the user may place their mouth at any point around the lip <NUM> of the vessel to try to drink. The suction force may thus be applied to any portion of the upper surface <NUM> of the resiliently deformable portion <NUM> in order to achieve the lifting or unsealing action described above. Thus, the user is able to drink from any point around the valve assembly <NUM>.

The engagement surface <NUM> and sealing surface <NUM>, and hence the sealing abutment, may be located proximate lip <NUM> but could also be located lower down the inner wall <NUM> without affecting the sealing effectiveness so long as the rim <NUM> is deformed within the inner wall <NUM> when the valve element <NUM> is inserted into a suitable sealing position. Consequently, the vertical position of the sealing abutment in relation to the inner wall <NUM> can vary without affecting its sealing ability, so long as the difference between the diameter of the outer edge <NUM> and the diameter of the inner wall <NUM> at the engagement surface <NUM> remains the same. In other words, so long as the engagement surface <NUM> provides the same deformation of the rim <NUM> into the sealing position, or the second plane, so that the contact between the sealing engagement surfaces is of comparative vertical height then the sealing abutment will be equally reliable regardless of the vertical position on the inner wall <NUM> of the vessel <NUM>.

While the effectiveness of the sealing abutment of the valve assembly is not affected by the vertical height within the vessel <NUM>, in the present embodiment it has been found to be advantageous for the user's drinking action to locate the sealing abutment proximate the lip <NUM>. In this way, in the sealing position, the outer edge <NUM> of the resiliently deformable portion <NUM> rests slightly vertically above the lip <NUM> thereby allowing the user to easily make an air-tight seal between their upper lip and the upper surface <NUM>. In this way, the user finds it easy to drink from the valve assembly <NUM> with a natural drinking action and does not have to alter the angle of the valve assembly <NUM> in their mouth or how far into their mouth they place the lip <NUM> in order to unseal a portion of the rim and drink easily. In particular, for infants and young children who are learning to drink from an open cup, the arrangement allows them to learn a "grown-up" drinking style without accidental spills.

The sealing and engagement surfaces <NUM> and <NUM> are moulded as smooth in the present embodiment. However, they may be modified in any known way such as by adding texturing or patterns to modify or control the friction between the two surfaces in order to moderate both the resistance to inserting the valve assembly <NUM> into the vessel <NUM> and the ease with which portions of the abutment unseal when the user drinks from the valve assembly <NUM>.

The material chosen for one or more of the surfaces <NUM> and <NUM> may differ to its respective supporting feature, for example, by co-moulding or attaching by other means a second layer to the rim <NUM> or the inner wall <NUM>, in order to further adjust the effectiveness of the sealing abutment.

The body <NUM> may further comprise an air vent as known in the art, in order to allow air into the vessel as the user drinks liquid from the vessel. Such air vents, for example a slit valve or a cross-cut dome valve cut located through any suitable portion of resilient elastomer, ensure that the pressure within the vessel remains equalised with the ambient pressure outside the vessel as the user drinks.

In the specific embodiment of <FIG>, the circumferential shoulder <NUM> is located <NUM> vertically down from the lip <NUM>. However, this location may be altered so that the circumferential shoulder <NUM> is higher or lower on the inner wall <NUM>. The shoulder may also be replaced by other suitable physical stops or means of engagement.

Furthermore, the vertical height of the body <NUM> can be altered by changing the angle to the horizontal of the resiliently deformable portion <NUM> and / or by changing the thickness dimension of the annular disc <NUM>. The annular disc <NUM> may also be replaced by suitable supporting arrangements, such as a number of supporting arms with gaps in between. Or, again, the cut-out portions <NUM> may be a different shape or configuration, as known in the art, as necessary to control the flow of liquid from the vessel to the sealing abutment. All such variations are feasible within the scope of the embodiment so long as the valve element <NUM> and the vessel <NUM> are arranged so that in a sealing position the rim <NUM> of the resiliently deformable portion <NUM> is deformed substantially inwardly to be located within the valve assembly.

The size and arrangement of at least some of the cut-out portions <NUM> correspond with the size and arrangement of the vertical ribs thereby ensuring the valve element <NUM> must be arranged in a specific rotational orientation as it is inserted into the vessel <NUM>. Once in the correct orientation, the valve element <NUM> is inserted into the vessel <NUM> until the lower surface of the annular disc <NUM> rests on the circumferential shoulder <NUM>. With the valve element <NUM> resting on the circumferential shoulder <NUM>, it can be locked to the vessel <NUM> by rotation relative to the vessel <NUM> as described below.

In the specific embodiment, the location of the pairs of bosses 635a and 635b are such that locking rotation is unidirectional. In other words, with the valve element <NUM> resting on the circumferential shoulder <NUM>, at least one first boss 635a engages with a rib <NUM> preventing rotation in one direction.

The lower edges <NUM> of each rib <NUM> are located <NUM> above the circumferential shoulder <NUM> to provide a vertical space which corresponds closely to the thickness of the annular disc <NUM>. In this way, when resting on the circumferential shoulder <NUM> the valve element <NUM> can be rotated to move a second boss 635b towards a rib <NUM> such that at least one locking area <NUM> engages a lower edge <NUM> thereby attaching the valve element <NUM> to the vessel <NUM>.

In order to remove the valve element <NUM> from the vessel <NUM> the rotation and insertion steps described above are reversed.

In the present embodiment, the inner wall <NUM> is provided with three vertical ribs <NUM> spaced at <NUM>° intervals around the inner circumference of the vessel <NUM>. The annular disc <NUM> comprises six cut-out portions <NUM>, spaced at <NUM>° intervals around its circumference, and two pairs of bosses 635a, 635b arranged diametrically opposite each other. With the ribs <NUM>, cut-out portions <NUM> and bosses 635a, 635b so arranged the valve element <NUM> can be oriented in any one of six rotational orientations and always locate, insert and lock to the vessel <NUM>.

The number and orientation of the locking features can be amended or modified as appropriate to provide an effective locking mechanism. For example, more or fewer ribs, cut-out portions and /or bosses may be provided as suitable. In addition, or instead, the ribs may be provided in an angled or helical arrangement. Further, the bosses and lower edges of the ribs may be modified to provide other means of engagement.

Yet further, the ribs, cut-out portions and /or bosses may be replaced entirely with other means of engagement as known in the art, for example clip fit or interference fit features, or screw threads, or the like.

In the present embodiment, the valve element <NUM> is moulded as a unitary part by over-moulding or co-moulding the handle <NUM> onto the axial pin <NUM>. However, the valve element <NUM> may comprise two or more parts, for example the body may be moulded separately from the baffle and attached together by known means, such as push fit. Alternatively, an additional fastener part may be used to secure a body part to a baffle part. In a yet further alternative, a baffle may be omitted, and the body may be attached directly to the inner wall, outer wall or base of the vessel by known attachment means. Such attachment means may be either similar or different to the baffle attachment means described above.

Some valve elements of the present disclosure may comprise a water filter unit. The water filter unit may be fitted inside the hollow region of the cylindrical portion. Such a water filter unit would act to filter liquid as it passes from the vessel and through the connecting means.

The valve assemblies disclosed herein have annular parts, high degrees of circular symmetry and may comprise valve faces which press against valve seats around an entire perimeter or periphery of the annular valve face. It will be appreciated that the valve assemblies disclosed herein can be described as <NUM>° valves, because a seal is formed around <NUM>° of the vessel and the valve assemblies allow a user to drink from any point on a perimeter of the upper rim of a drinking vessel.

A particular advantage of the valve assemblies disclosed herein is that a user applies direct contact pressure with their lips in the vicinity of the valve face.

In other words, in embodiments disclosed herein, pressure is applied to a certain point on the rim, and the movement of the valve is localised to this certain point. In broader terms, the part of the valve which the user contacts is the part of the valve which moves in order to allow fluid to flow from the vessel. This arrangement allows a user to exercise a much greater control over the valve face surface, and this in turn allows greater control of a fluid flow rate from the vessel. This is in contrast to known assemblies, some of which have multiple component parts which separate the point of lip contact and the part of the valve which moves to allow fluid to flow in response to the fluid contact. In known assemblies, rather than the small localised movements allowed by the present valve assemblies, large parts of the valve must move in response to the user's lip pressure. These assemblies by necessity cannot be as sensitive, or give a user such fine control over fluid flow, as the present valve assemblies.

In some examples disclosed herein, the valve element and vessel are arranged coaxially with respect to one another. In other words, the valve element and vessel share a common axis and display a great deal of rotational symmetry about this axis. In part, it is this coaxial arrangement which allows for an infant or other user of the valve assembly to apply pressure to any point on the perimeter / circumference of the outer rim and thus drink from the valve assembly / vessel in any orientation. Thus, a so-called <NUM>° valve is provided. This type of valve assembly allows an infant to progress from more traditional infant cups, which have spouts or teats, to a cup which more resembles the `open ended' cups from which the infant will be expected to drink as an adult.

The disclosed valve assemblies comprise two main components: the vessel and the valve element. Importantly, a seal is formed between these two components in a simple manner without the need for additional parts, components or valve parts. The infant cup industry is one in which increased simplicity is valued by manufacturers and consumers. It will be appreciated that not only are the valve assemblies of the present disclosure easy for a user to take apart and re-assemble, for example in order to clean the assembly or fill the vessel, but they also bring manufacturing efficiencies and associated cost savings due to the reduced number and complexity of the component parts.

In the example shown in <FIG>, the sealing cap, annular valve face and cylindrical portion are integral, thus forming a single integral component which is easily removed from the vessel in order to clean the component and vessel, and/or refill the vessel with liquid. The integral valve element component can be easily and simply reconnected to the vessel by the user. In the example shown in <FIG>, the sealing member is integral with the vessel, which results in an assembly which only requires two main components to operate. In other words, in the <FIG> example, a first component comprises the vessel and the sealing member, and a second component comprises the valve element. In the example shown in <FIG>, the cylindrical portion, connecting means, and sealing cap are integral, and together form the valve element. Thus, as with the other disclosed examples, the valve assembly of <FIG> only requires two components to operate as a valve: the vessel and the valve assembly. In the embodiment shown in <FIG>, the body, including the resiliently deformable portion, and the baffle including the annular disc are moulded as a unitary part. Thus, again, the valve assembly of <FIG> only requires two components to operate as a valve: the vessel and the valve assembly.

The biasing force between the vessel and valve elements of the present disclosure can be fine-tuned by adjusting the screw fit arrangement or the attachment means. This can be done on the manufacturing side, for example by adjusting the size, number of turns and location of the threading, and it will be appreciated that valve assemblies according to the present disclosure provide valves which have a sealing strength which can be easily adjusted by the manufacturer to ensure a consistent biasing force every time the user screws the valve assembly onto the cup. The amount of biasing force may be determined or controlled by the depth to which the valve element can be screwed down relative to the vessel. The manufacturer may opt to control this depth, and hence the biasing force, by incorporating a click or stop on the screw thread, or by adding a visual marker to the top of the valve element so that the user stops rotating when it lines up with a corresponding marker on the cup rim.

Alternatively, or additionally, the biasing force / strength can be adjusted on the consumer side, as it will be appreciated by the skilled person that tightening the screw fit, and thus increasing the pressure with which the valve element presses down onto the vessel, will in turn cause an associated increase of the biasing force between the valve face and seat.

Valve assemblies of the present disclosure may comprise air vents and/or air valves. Such air valves may be formed in the valve element, and may take the form of a one-way air-inlet valve of any appropriate type, for example an integrally moulded duck-bill valve or dome valve. Such air valves allow the passage of air therethrough such that pressure can be equalised between the atmosphere and the interior of the cup.

The valve elements depicted in the <FIG> generally comprise a sealing cap connected by connecting means / connecting structure to a cylindrical portion, and the vessels generally comprise an interior region which is suitable for holding liquid and an upper rim from which the user can drink. The valve element is attached to the vessel via attachment means, e.g. a screw thread on an exterior portion of the valve element and a corresponding screw thread on an interior of the vessel. The respective valve elements can be removed from a vessel in order to refill the vessel and/or clean the respective valve element and vessel. In the valve assemblies depicted in the figures, an attachment means is provided between the valve element and vessel. However, while the valve assemblies depicted in the figures comprise a single component vessel, this need not be the case. Vessels of the present disclosure may comprise a plurality of components. Attachment means between the valve element and vessel may also take a different form than that shown in the figures, or may be omitted from the assembly entirely.

For example, in some examples a different valve assembly structure is utilised. The vessel may have multiple components, for example an upper vessel component and a lower vessel component which are removably detachable from one another. The upper component may comprise the vessel upper rim, while the lower component may comprise the interior region which is suitable for holding and/or storing liquid. The upper component may be a collar or upper rim which is removably attachable to the lower vessel component. The collar may be removably attachable to the valve element, or may be integral with the valve element. A vessel component attachment means may be provided between the vessel upper component and the vessel lower component. In such embodiments, the sealing cap and cylindrical portion may be integral with the upper component of the vessel.

The valve assembly may comprise two attachment means, the first between the vessel components and the second between the valve element and one of the vessel components. The first attachment means may be a push fit-arrangement / mechanism, a screw thread, or a bayonet attachment. When the two vessel components are attached to each other, they form a valve assembly similar to that depicted in <FIG>, <FIG> or <FIG>.

Whilst valve assemblies have been described which have high degrees of circular symmetry, and which are suitable for allowing a user to drink from any point around an upper rim of the vessel, it will be appreciated that this may not always be the case. For example, breaks and discontinuous portions may be provided in the outer rim of the sealing cap. The valve assemblies shown in the figures can be modified to allow a user to drink from any desired amount of the upper rim. For example, rather than the entire circumference of the upper rim, the valve assemblies of the present disclosure may be suitable for allowing a user to drink from any point on the rim perimeter defined by a sector having an angle from, for example, around <NUM>° right through to the full <NUM>°.

As will be appreciated by those skilled in the art, the components of the valve assembly can also be produced via additive manufacturing, for example via the use of a <NUM>-D printer. First, a computer-readable file containing data representative of a valve component is produced. The data may be representative of the geometry of successive cross-sections of the component. This data is often called 'slice' or 'layer' data. The data can be produced from a CAD-style file, or via the use of a <NUM>-D scanner. A <NUM>-D printer can then successively lay down layers of material in accordance with the cross-section data to produce the valve components.

It will be appreciated that relative language such as upper, inner, outer, etc. is used herein. This language refers to the assembled valve assembly, i.e. when the valve element is attached to the vessel, and / or when the vessel is in an upright orientation as shown, for example, in <FIG> and <FIG> and <FIG>. Vertical and horizontal, as well as angles measured therefrom are to be understood as if the valve assembly and components are resting on flat support surface such as a table. Up and down, upper and lower, and other relative directional terms are to be determined accordingly unless otherwise stated. This language is used to aid understanding of the disclosed valve assemblies and should not be considered to limit the present disclosure.

Claim 1:
A valve assembly (<NUM>) comprising:
a vessel (<NUM>) for receiving a liquid comprising a lip (<NUM>) and an inner wall (<NUM>) comprising a substantially vertical engagement surface (<NUM>), and
a valve element (<NUM>) comprising a body (<NUM>) comprising a resiliently deformable portion (<NUM>) having a rim (<NUM>), the rim (<NUM>) located in a first plane,
wherein at least the rim (<NUM>) of the resiliently deformable portion (<NUM>) is configured to deform substantially inwardly, to be located in a second plane, so as to be located within the vessel (<NUM>) inner wall (<NUM>) and into a sealing position within a valve assembly (<NUM>), and further wherein a portion of the rim (<NUM>) is configured to lift out of the second plane upon application of a suction force to an upper surface (<NUM>) of a corresponding portion of the resiliently deformable portion (<NUM>),
wherein the resiliently deformable portion (<NUM>) has a lower surface (<NUM>), the lower surface (<NUM>) comprising a sealing surface (<NUM>) configured to provide a sealing abutment with the substantially vertical engagement surface (<NUM>) on the inner wall (<NUM>) of the vessel (<NUM>),
and wherein the rim (<NUM>) has an outer edge (<NUM>) and, when the rim (<NUM>) is in the second plane, the sealing surface (<NUM>) is substantially cylindrical, and the outer edge (<NUM>) is configured to sit above the sealing surface (<NUM>).