Patent Description:
Moving subjects between a first location (e.g. a bed or the ground) and a second location (e.g. a surgical table, a gurney, etc.) is difficult when the subject is incapacitated. This is particularly the case for elderly people, sick people, unconscious people and injured people. Furthermore, the same difficulties can also apply for moving animals. These subjects are able to offer little assistance to those attempting to move them. Furthermore, the subject may require delicate movement to prevent injury.

Lifting of subjects is typically carried out using manual techniques, such as two person lifts of a patient which may include the use of assistive devices such as a belt attached to the subject with handles to allow the assistants to obtain a better grip of the subject, or a patient handling sling, or by the use of mechanical devices such as floor mounted crane type hoists or ceiling mounted hoists. All are characterized by a requirement of close contact with the subject either by the assistant or the devices. Whilst there is variability from one subject to the next, there is generally considerable effort required of the assistants, a loss of dignity and a feeling of insecurity felt by the subject.

Movement of subjects therefore presents serious occupational health and safety risks to persons tasked with moving the subject, including, for example, nurses, orderlies, ambulance officers, veterinaries, wildlife officers, etc. Such occupational health and safety risks include back strain and other injuries. Additional staffing may be required to move subjects to avoid injury.

It is therefore desirable to provide a device that allows for the safe lifting of subjects, as well as a feeling of security and dignity to the subject.

<CIT> discloses a rail system having a pair of rails and a person support structure movably mounted to the rails.

<CIT> discloses spaced cantilevered tynes in a lifting platform having a foldable platform surface.

A first aspect of the present invention provides a lifting system for lifting a subject supported in a desired position, the lifting system as set out in the accompanying independent apparatus claim <NUM>.

Preferably, the lifting device has at least one cantilevered tyne for sliding engagement in the attachment structures of the platform. In a further preferred form, the lifting device has a plurality of spaced cantilevered tynes, wherein the tynes are selectively lockable in fixed positons relative to each other, and movable to change positons relative to each other.

Preferably, the lifting device has four tynes and the platform has a backrest portion, a seat portion and a leg rest portion, wherein the backrest portion extends between two of the four tynes when engaged with the lifting device, the leg rest portion extends between the remaining two tynes, and the seat portion extends between the back rest portion and the leg rest portion, such that during use the back rest portion, seat portion and leg rest portion are angularly displaceable relative to each other by relative movement of the four tynes.

The seat portion incorporates an opening for toileting. The seat portion may have saddle contouring for supporting the subject as the lifting device reconfigures the platform towards an upright orientation.

Preferably, the inflatable compartments are formed from a top layer, a bottom layer, and an intermediate spacer layer disposed therebetween, wherein the spacer layer is made from a drop stitch material with a multitude of interconnecting threads of predetermined length sandwiched between the top layer and the bottom layer, such that inflation of the inflatable compartments rigidly fixes the top layer relative to the bottom layer in accordance with the lengths of the interconnecting threads.

Preferably, the lifting device has ground supports configurable for movement across varying floor surfaces. In a further preferred form, the lifting device does not obstruct movement of the subject's feet when in contact with the ground.

The lifting device may be powered and have a control interface for operative control of the platform. Preferably, the operative control of the platform includes selectively switching between the flexible state and the rigid state.

The control may interface provides operative control of the inflation and deflation of each compartment in the platform.

Optionally, the lifting device is alternatively or additionally controlled by a remote device. In some forms, the remote device is a hand held smart device with a touch screen.

Optionally, the lifting device is alternatively or additionally controlled by technology developed for people with disabilities. Preferably the technology accepts user inputs including one or more of the following:.

Some examplesmay provide an inflatable mattress switchable between a deflated state and an inflated state, the mattress comprising a channel into which a support element may be inserted, wherein insertion of the support element reinforces the mattress in the inflated state when the mattress bears a weight thereon.

Inflation of the mattress can expose the channel and allow the support element to be readily inserted therein. As the mattress is reinforced by the support element, the mattress itself may be manufactured without rigid support components. In some examples, this can assist in safely placing a subject on the mattress. Furthermore, use of the mattress in conjunction with the support element allows for safe lifting of a subject on the mattress as the support element reinforces the mattress.

The term "reinforce" as used herein in relation to the use of a support element in a channel of the mattress should be understood to mean that the support element confers strength to the mattress when the mattress bears a weight thereon. The support element may confer strength to the mattress by, for example; distributing the weight on the mattress over a larger surface area of the mattress; bearing some of the weight on the mattress; transferring some of the weight from on the mattress; increasing the rigidity of the mattress; and/or preventing or reducing unwarranted deformation of the mattress.

In some examples, the support element reinforces the mattress when the mattress is inflated and lifted with a weight thereon.

In some examples, the mattress comprises a plurality of channels into which support elements may be inserted.

In some examples, when the mattress is inflated, the mattress is adjustable between an unbent configuration and a bent configuration or between different bent configurations via one or more inserted support elements.

The weight on the mattress may comprise a subject (e.g. an animal or human) or an inanimate object (e.g. a vehicle, goods, building materials, etc.). In this regard, the mattress may be sized and shaped according to the desired weight thereon.

A related aspect of the invention provides a method of lifting a subject supported in a desired position, the method as set out in the accompanying independent method claim.

Another example provides a lifting system comprising: the mattress of the first aspect of the invention; and one or more support elements, wherein the one or more support elements are insertable into the one or more channels of the inflated mattress to reinforce the inflated mattress when the mattress is inflated and bears a weight thereon.

The support elements may be sized, shaped and weight rated according to the weight to be lifted on the mattress and the size, shape and configuration of the mattress itself.

A related example provides a method for lifting a subject or an object, the method comprising: inflating a deflated mattress as described above on which the subject or object is resting; inserting one or more support elements into the one or more channels of the inflated mattress; and lifting the inflated mattress; wherein the one or more support elements reinforce the inflated mattress when the mattress is lifted.

For ease of reference, the inflatable mattress will be described herein as having a longitudinal dimension (or length) and a lateral dimension (or width). It will be appreciated that the term "substantially longitudinal" in relation to the mattress means at an angle ranging from <NUM>° to <NUM>° to the longitudinal axis of the mattress. It will also be appreciated that the term "substantially lateral" in relation to the mattress means at an angle ranging from <NUM>° to <NUM>° to the lateral axis of the mattress.

It is to be understood that the following description is for the purpose of describing particular examples only and is not intended to be limiting with respect to the above description.

A first example provides an inflatable mattress switchable between a deflated state and an inflated state, the mattress comprising a channel into which a support element may be inserted, wherein insertion of the support element reinforces the mattress in the inflated state when the mattress bears a weight thereon.

It will be appreciated by those skilled in the art that the inflatable mattress may take any one of a range of different sizes and shapes. In some examples, the inflatable mattress is generally elongate and sized for a person to lie on. In some examples, the inflatable mattress will be generally elongate but sized and shaped to fit in a chair or a wheelchair. In other examples, the elongate mattress may be sized and shaped to accommodate a vehicle, building materials or other objects. The mattress may be <NUM>-dimensionally or <NUM>-dimensionally contoured, or substantially flat, when inflated.

The term "deflated" as used herein in relation to the inflatable mattress is intended to mean that the mattress is substantially devoid of a volume of air. In contrast, the term "inflated" as used herein in relation to the inflatable mattress is intended to mean that the mattress contains a substantial volume of air and may be used to refer to a completely inflated or a semi-inflated mattress, and will typically contain a volume of air which is at a higher pressure than the surrounding ambient air pressure. A typical inflatable mattress will have opposed top and bottom walls bounded by side walls. In the deflated state, the opposed top and bottom walls may contact each other as the mattress is substantially devoid of a volume of air (i.e. there is no or little air pressure on the walls of the mattress to keep the top and bottom walls apart). In this state, the mattress can be folded (or rolled, or concertinaed, whichever is convenient) about a longitudinal line so that the patient support surface is partially over-laying on itself. The patient (usually laying flat on a bed) is rolled onto one side and the folded, deflated mattress is placed along-side with its longitudinal foldline adjacent the length of the patent. Gently rolling the patent onto the opposite side allows the folded edge of deflated mattress to be unfurled so that the patient can roll back to lie completely on its top surface.

In the inflated state, the air pressure in the mattress separates the top and bottom walls to support the patient with a cushion of air. The amount of internal air pressure will depend on whether the mattress is semi-inflated or completely inflated.

In semi-inflated states, the air pressure on the walls is reduced (compared to the completely inflated mattress) and if an external local or distributed inwardly acting force is applied to the walls of the mattress, the walls of the mattress may deform (i.e. the top and bottom walls may be forced together).

While 'air' is a suitable medium for the purposes of inflating the mattress, it will be appreciated that other suitable gases could be employed for the same purpose, such as, for example, carbon dioxide.

The mattress may be inflated by forcing air into the mattress through an air inlet on the mattress. The mattress may be deflated by allowing the air inside the mattress to escape through an air outlet on the mattress. In some examples, the air outlet may also be the air inlet. The mattress may be self-inflating (e.g. via a self-contained pierceable air or carbon-dioxide canister) or compressed air may be pumped through the air inlet (e.g. by an air compressor, a compressed air storage cylinder, or by mouth blowing of air). In some examples, the air inlet may comprise an aperture, which can be sealed using a plug or the air inlet may comprise a valve. Appropriate plugs and valves for inflatable mattresses are known in the art.

The inflatable mattress may comprise compartments defined by inner mattress walls. The compartments may be in fluid communication with each other, thereby allowing the compartments to be inflated together (i.e. a single air inlet may be used to inflate all the compartments). Alternatively, the compartments may be sealed from each other and each compartment may include separate air inlets for inflation. In examples in which the mattress includes separately inflatable compartments, the different compartments may be inflated to different air pressures. The compartments may be uniform in size and/or distribution. Alternatively, some compartments may be larger than others and/or compartments may be stacked on top of each other. For example, a mattress may comprise larger compartments or more compartments around its side walls to provide a raised boundary when inflated. Such a mattress may be useful in retaining objects or subjects on the mattress.

A range of configurations and sizes of compartments may be used. In some examples, the inflatable mattress may comprise a plurality of substantially longitudinal inflatable compartments, a plurality of substantially lateral inflatable compartments or a combination of substantially longitudinal inflatable compartments and substantially lateral inflatable compartments. The compartments may be used to increase the rigidity to the mattress when inflated.

In some examples, the mattress is semi-rigid when inflated. The semi- rigidity may be provided by inflatable compartments. Alternatively, the semi- rigidity may be a result of air pressure to which the mattress is inflated and/or a result of the composition of the mattress. The term "semi-rigid" as used herein in relation to the mattress is intended to mean that the mattress resists bending in a longitudinal or a lateral plane unless a sufficient force is applied to the mattress.

The mattress may comprise a resilient material. Such mattresses allow a degree of expansion upon inflation and/or can permit a degree of bending. In some examples, the mattress is made from rubber or plastic including, for example, polyvinylchloride (PVC), rubberized nylon, rubberized rayon, rubberized fabric, PVC-fused materials such as rayon or fabric, and the like. In some examples, different parts of the mattress may be made from different materials to facilitate stretching and/or compression of the different parts of the mattress upon bending. Heavy duty materials, for example a woven aramid fibre such as Kevlar, may be used for examples in which heavy loads are expected.

In some examples, the mattress may contain compartments with differential air pressures, across the depth of the mattress or in specific locations to improve the structural performance or other characteristics of the mattress in the inflated state.

In some examples, the compartments may be used to create a zone in a top section of the mattress which provides a layer that substantially resists compression and a zone in a bottom section which provides a tensile layer, similar to the flanges on a steel "I" beam. The creation of such zones in the mattress can improve the strength of the mattress and can aid in the controlled bending of the mattress.

As one or more support elements may be inserted into the inflated mattress to reinforce the mattress, the mattress itself doesn't require rigid components (although in some examples the mattress may comprise rigid components). In this regard, in some examples, the mattress may be rolled or folded when deflated. In some examples, the configuration of compartments can assist in the rolling or folding of the deflated mattress (e.g. a longitudinal configuration of compartments assists in the longitudinal rolling or folding of the mattress). The ability to roll or fold the mattress can allow the mattress to be stored in a compact form and can also be useful in placing patients on the deflated mattress (as will be described later).

As described above, the mattress according to the first aspect of the invention includes a channel into which a support element may be inserted. The insertion of the support element reinforces the mattress when the mattress is inflated and bears a weight thereon. In some examples, the mattress may comprise a plurality of channels into which support elements may be inserted.

While the support element(s) may be inserted into the channel(s) when the mattress is in the deflated state, in most instances it will be preferable to insert the support element(s) into the channel(s) when the mattress is in the inflated state. By inflating the mattress prior to inserting the support element(s) into the channel(s), the entries to the channel(s) may be better exposed and/or better defined i.e. the top and bottom walls of the mattress will not be in contact - which would otherwise obscure the entries to the channel(s).

As described above, the support element(s) may reinforce the mattress by, for example: distributing the weight on the mattress over a larger surface area of the mattress; bearing some of the weight on the mattress; transferring some of the weight from on the mattress; increasing the rigidity of the mattress; and/or preventing or reducing unwarranted deformation of the mattress. While it is envisaged that the mattress will be maintained in the inflated state for the duration in which the support element(s) are in the channel(s), some examples may allow the mattress to be deflated with the support element(s) still reinforcing the mattress bearing the weight. For example, the mattress may be inflated to raise a patient to allow the support element(s) to be inserted, and then the mattress may be deflated such that the patient rests on the support element(s). This may be performed for injuries where it is desirable to move the patient onto a transfer apparatus with minimal movement of the patient, yet still transport the patient on a rigid surface.

In some examples, the mattress becomes a tension structure once the support elements have been inserted. In these examples, as the tension of the mattress between the support elements may sufficiently reinforce the mattress to support a weight thereon, the mattress may be deflated once the support elements have been inserted. In some examples, the one or more channels may not run entirely through the mattress (i.e. the channels may only have one open end). In these examples, it is desirable that the channels are deep enough to accommodate support elements that adequately support a weight on the mattress. In this regard, it is generally desirable that the one or more channels run at least half the length or width of the mattress.

The support element(s) may be completely contained with the channel(s). In these examples, the mattress may be lifted by handles provided by or attached to the mattress. Alternatively, an end of each support element may protrude from the channel. In this regard, the end of the support element(s) may also act as a handle for lifting the mattress.

In other examples, the one or more channels form one or more holes through the mattress (i.e. each channel has two or more open ends). In this regard, support element(s) that at least span the width or the length of the mattress may be inserted into the channel(s). This arrangement allows both ends of each support element to protrude from the channel(s), thereby allowing the mattress to be lifted via the one or more support elements.

In some examples, the one or more channels may run substantially longitudinally in relation to the mattress or substantially laterally in relation to the mattress. In some examples, the mattress may include channels that run substantially longitudinally in relation to the mattress and channels that run substantially laterally in relation to the mattress. In this regard, some mattresses may include channels that intersect or cross over with other channels.

In some examples, all the channels run substantially longitudinally in relation to the mattress or all the channels run substantially laterally in relation to the mattress. In these examples, it may be advantageous for the mattress to include compartments, as described above, which run perpendicular to the channels to further reinforce the mattress. Such compartments can make the mattress semi-rigid between the channels.

In some examples, when the mattress is inflated, the mattress is adjustable between an unbent configuration and a bent configuration or between two different bent configurations via one or more inserted support elements. As described above, in some examples, the inflated mattress may be substantially flat or <NUM>-dimensionally or <NUM>-dimensionally contoured. In this regard, the term "unbent configuration" as used herein in relation to the inflated mattress is intended to mean the normal inflated configuration of the mattress (i.e. the configuration when a bending force has not been applied to the inflated mattress). Accordingly, the term "bent configuration" as used herein in relation to the inflated mattress is intended to mean a configuration that is different to the normal inflated configuration as a result of the application of a bending force to the inflated mattress.

In some examples, the mattress may be adjusted between the unbent configuration and a bent configuration by insertion of one or more curved support elements. Preferably, such a curved support element will have a gentle curve to still permit easy insertion of the support element into the channel. For example, inserting a support element with a gentle curve can be used to adjust the inflated mattress from a flat configuration to a curved configuration. Such a curved configuration may assist in retaining a patient on the mattress by raising the height of the edges of the mattress. In some examples, the channel may also be configured to more readily receive a bent support element (i.e. the channel itself may be curved).

In some examples, the support elements may be hinged to adjust the mattress between an unbent configuration and a bent configuration and/or to assist in the lifting of the mattress. For example, a support element with two hinges may be adjusted by the hinges such that the support element has a middle substantially horizontal portion and two angled end portions. Once inserted into the channel, the two angled portions may be located within the channel in which case the mattress will bend when the support element is adjusted by the hinges such that the mattress will have a middle substantially horizontal middle portion and two angled end portions. In this regard, the edges of the mattress may be raised, which can be useful in retaining objects or subjects on the mattress. Alternatively, the hinges of the support element may be such that they are located outside the channel and allow the support element to bend upwards. This can assist in the lifting and lowering of the mattress, especially from/to the ground or low locations that may otherwise require people lifting the mattress to bend while supporting the weight of the mattress.

In other examples, the mattress may be adjustable between an unbent configuration and a bent configuration by moving a first inserted support element relative to a second inserted support element.

In some examples, the bent configuration may comprise multiple bends. The multiple bends may be obtained, for example, by relative movement of a first support element, a second support element and a third support element. In this regard, the configuration of the mattress may be adjusted to suit different purposes. For example, the mattress may be used to adjust a patient on the mattress from a lying position to a seated or semi-reclined position or to raise and better support the patient's legs.

As the inflated mattress will comprise less air volume directly above and below the channels, and the channels themselves are not pressurized with air, the channels provide ideal pivot points for the mattress to bend when support elements are inserted into the channels i.e. bending the mattress along a channel with a support element therein requires less displacement of air from above or below the channel to other parts of the mattress. Furthermore, the support element in the channel is able to react the force applied to the bend in the mattress.

As described above, the support element(s) inserted into the channel(s) reinforce the mattress when the mattress bears a weight thereon. The source of the weight may come in many forms. For example, the weight may comprise an inanimate object including, for example, a vehicle, goods, building materials or any other objects that may be desired to be lifted, moved or supported on the mattress. While the weight may comprise an inanimate object, in most examples the mattress may be used for animals or humans and the weight comprises respectively an animal or a human subject.

In examples wherein the weight comprises an animal, it is envisaged that the animal will be relatively large. The animal may include, for example, mammalian subjects such as primates, livestock animals such as horses, cattle, sheep, pigs, goats or the like, companion animals such as dogs, or animals of veterinary significance, or animals of economic significance. The subject may also include non-mammalian animal subjects such as reptilian animals, large birds and fish.

In some examples wherein the weight comprises a human, the human may be a human capable of only limited movement. For example, the human may be elderly, disabled, injured or sick. Thus, examples of the invention are particularly suitable for use in, for example, hospitals, nursing homes, ambulances, rescue services, and at sporting events (e.g. for injured players).

In some examples, the mattress may be used to assist in the transfer of a wheelchair bound person from the wheelchair to a bed or a seat including, for example, a seat in a car or an aircraft. In these examples, the mattress (sized to fit in a wheelchair) may be placed under the person in the wheelchair. When it is desired to move the person, the mattress is inflated and support elements inserted into the channels. The mattress with the person thereon may be lifted via the support elements and placed on the seat in the car or aircraft. The support elements may then be removed and optionally the mattress may be deflated. Use of the mattress in this manner, can simplify the transfer of wheelchair bound persons and avoid the need for the person to lift themselves in public to allow a transfer seat to be placed under them.

As can be appreciated, the mattress may also be used to transfer mobility impaired persons who are not wheelchair bound from a first seat to a second seat as described above.

As the mattress is inflatable, aquatic applications are also envisaged. For example, the mattress may be used as a floatable platform for bearing a subject or an object thereon. Support elements may be inserted to reinforce the mattress and may also be used to assist in moving the mattress (e.g. when the mattress is lifted or towed). In some examples, the mattress in a deflated state may be placed under an underwater object and inflated e.g. by use of a compressed air storage cylinder or a compressed air feed line from an air compressor on a boat. The inflation of the mattress may be sufficient to raise the mattress with the object thereon to the water surface. Support elements may then be inserted to reinforce the mattress and the mattress lifted from the water with the object thereon or moved along the surface of the water e.g. towed by a boat. Alternatively, the support elements may be inserted into the inflated mattress underwater to reinforce the mattress with the object thereon and the inflated mattress lifted to the surface of the water via the inserted support elements or other handles provided on the mattress.

Another aspect of the invention provides a lifting system comprising: the mattress as described above; and one or more support elements, wherein the one or more support elements are insertable into the one or more channels of the inflated mattress to reinforce the inflated mattress when the mattress is inflated and bears a weight thereon.

In some examples, the support elements are shaped to fit snugly within the channels. For example, when cylindrical support elements are used, the support elements may have a diameter which is approximately the same diameter as the channels when the mattress is inflated. In other examples, the support elements are shaped simply to fit in or through the channels (i.e. the support elements may have a smaller diameter or even a different cross-sectional shape compared to the channels when the mattress is inflated). In these examples, the support elements may reinforce the mattress when the mattress is lifted with the weight thereon.

In some examples, the one or more support elements are longer than one or more channels, which form one or more holes through the mattress, such that one or both ends of the one or more support elements projects from the one or more channels. In this regard, the mattress with a weight thereon may be lifted via the one or more support elements. Different support elements may be used depending on the size of the mattress, the purpose of the mattress, the size of the channels and the number of channels. For example, the mattress may comprise a single wide channel running the length of the mattress and the support element may be provided by a plank which is inserted into the channel. In other examples, the mattress may comprise tubular channels (of circular or other shaped cross-sections) and the support elements may comprise poles.

In some examples, the support elements may be rigid support elements that are straight or curved. In other examples, the support elements may be flexible (i.e. the support elements may be provided by cables, ropes or the like). In these examples, the support elements may reinforce the mattress when the cables or ropes are pulled taut. In some examples, the support elements may be hinged, for example, as described previously herein.

In some examples, the support elements may comprise handles or lifting members (e.g. lifting eyes, cleats, etc.) on one or both ends. The handles or lifting members may be integral to the support element or may be attachable to the support element. In examples whereby the handles or lifting members are integral to the support elements, at least one handle or lifting member should be sized to permit insertion in a channel of the mattress. Handles or lifting members which are too large to allow insertion of the support element in a channel of the mattress should either be removable from the support element or only provided on one end of the support element. Such handles or lifting members may be used to prevent unwarranted removal of the support element from the mattress.

Removable handles or lifting members may be attached to the support element by methods known in the art including, for example, threaded engagement, clamping, interlocking, cord-ties, etc..

In some examples, the lifting system includes an inflated mattress which is adjustable between an unbent configuration and a bent configuration or between two different bent configurations via one or more inserted support elements. As discussed previously herein, the mattress may be adjustable between an unbent configuration and a bent configuration or between two different bent configurations by insertion of one or more curved or hinged support elements. Accordingly, the lifting system may comprise one or more curved or hinged support elements.

Alternatively, the mattress may be adjustable between an unbent configuration and a bent configuration or between two different bent configurations by moving a first inserted support element relative to a second inserted support element. The first inserted support element may be moved vertically or both horizontally and vertically relative to the second inserted support element e.g. maintained parallel with, but translated (vertically, horizontally, or both vertically and horizontally) relative to the second inserted support element.

In some examples, the bent configuration comprises multiple bends defined by the relative movement of multiple inserted support elements. In some examples, the bent configuration comprises a seated or reclined configuration. The mattress in the seated configuration may provide a substantially horizontal mattress portion between two angled end mattress portions. The two angled end mattress portions may be angled, for example, between <NUM>° and <NUM>° to the substantially horizontal mattress portion.

In some examples, the lifting system further comprises an external support to which the one or more of the support elements may be attached.

In some examples, the external support comprises a frame. The frame may be used to connect two or more support elements. In this regard, the frame may be used to retain the two or more support elements in a set position. The frame may also be used to lift the mattress. Accordingly, in some examples, the frame comprises handles for lifting the mattress.

These examples may be particularly useful for sporting injuries, whereby an injured player may be placed on the deflated mattress. The mattress is then inflated and the support elements inserted into the mattress. The support elements are attached to the frame and the injured player may be carried off the ground.

In some examples, the frame includes wheels or is connectable to a second frame comprising wheels, such that the frame may simply be pushed or pulled. For example, in some examples, the frame may comprise a gurney or the frame may be connectable to a gurney.

In some examples, the frame is adjustable such that the support elements may be attached to the frame when the mattress is in a bent configuration and when the mattress is in an unbent configuration. The frame may therefore be used for mattresses in both configurations. In some examples, the frame is adjustable while the support elements are attached to the frame. For example, the support elements may be attached to the frame when the mattress is in an unbent configuration and then the frame may be adjusted to move the support elements, thereby moving the mattress into a bent configuration. In this regard, the frame may comprise hinges including, for example, lockable hinges. Adjusting the configuration of the mattress by adjusting the frame may be useful when it is desired to move a person on the mattress from a reclined position to a seated position, or alternatively, to raise the persons legs.

The frame may be adjustable manually or via motorisation. In this regard, in some examples, the frame may house or be attachable to one or more motors and/or power sources.

In some examples, the external support comprises a barrier to reduce the likelihood of the weight falling off the inflated mattress. For example, the external support may comprise a rail that is higher than the mattress and which runs substantially along a boundary of the mattress.

In some examples, the lifting system further comprises a lifting device for lifting the inflated mattress, the lifting device comprising one or more attachment points for attaching one or more support elements (as cantilevers, or attached at both ends), and relevant hoisting machinery.

The attachment points for attaching one or more support elements to the lifting device may comprise any known attachment means. For example, the support elements may be attached to the attachment points by a threaded engagement, clamping engagement, a forked or wedge slide connection, a sleeved or spigoted connection, a male/female journal and locking screws arrangement, etc..

The hoisting machinery may include any suitable mechanism for hoisting a weight. For example, the hoisting machinery may comprise a hydraulic hoist, a pulley hoist, a chain hoist, a pneumatic hoist, a mechanical hoist, etc. The hoisting machinery may be manually operated, or power operated. Accordingly, in some examples, the lifting device is an automated lifting device.

In some examples, the hoisting machinery is able to translationally move one or more of the attached support elements relative to each other in a vertical direction, a horizontal direction or a horizontal and vertical direction.

In some examples, the hoisting machinery comprises independent hoisting elements, whereby each hoisting element is capable of independently moving one or more attached support elements. In this regard, the lifting device may be used to adjust the mattress between an unbent and a bent configuration or between two different bent configurations. The independent hoisting elements of the lifting device can also allow the lifting system to be used to lift a patient from a bed which is already in a bent configuration.

The lifting system comprising the lifting device may be used, for example, in hospitals and nursing homes, whereby patients are often required to be transferred between their bed and a gurney or another bed. In these examples, the lifting device may also comprise cantilevered support legs which are able to extend beneath the patient's bed to support the lifting device as the mattress is lifted with the patient thereon. The lifting system may also be used to adjust the position of a patient (e.g. between a reclined position and a seated position or to raise the patient's legs). This can be important for patients that are unable to move themselves easily between these positions and can offer health benefits (e.g. the change in position may be used to relieve pain or swelling, offset acid reflux, offset heartburn, improve digestion, improve breathing, relieve the heart muscle or stomach muscles, provide passive stretching, etc.).

In some examples, the mattress and/or lifting device may be incorporated into the design of a bed or chair.

In some examples, the hoisting machinery further comprises an air compressor or a compressed air storage cylinder for inflating an inflatable mattress.

In examples in which the lifting system may be used to lift a heavy object (e.g. a vehicle), the lifting system may comprise industrial hoisting machinery (e.g. a crane, a forklift, etc.).

A further aspect of the invention provides a method for lifting a subject or an object, the method comprising: inflating the deflated mattress as described above on which the subject or an object is resting; inserting one or more support elements into the one or more channels of the inflated mattress; and lifting the inflated mattress; wherein the one or more support elements reinforce the inflated mattress when the mattress is lifted.

In some examples, lifting the inflated mattress comprises lifting the mattress by the one or more support elements. Alternatively, the mattress may be lifted by handles provided by or attached to the mattress.

In some examples, the method further comprises placing the subject or an object on the deflated mattress before inflation thereof.

In examples comprising a mattress that is capable of being rolled when deflated, placing the subject on the deflated mattress may comprise:.

Placing the subject on the mattress may also comprise the above steps but where the mattress is folded instead of rolled.

As the mattress itself does not require rigid support components, the subject should experience minimal discomfort and injury as the subject is rolled onto the deflated mattress as described above.

This method may be particularly useful when the subject is injured or unable to place themselves on the mattress.

In some examples, the method comprises adjusting the mattress between an unbent configuration and a bent configuration or between two different bent configurations via the support elements. Methods for adjusting the mattress between an unbent configuration and a bent configuration or between two different bent configurations via the support elements are as described previously herein.

In some examples, lifting and/or adjusting the mattress may be performed by operating the lifting system as described above.

The method may be used for lifting an animal or a human. Accordingly, in some examples, the subject is an animal or a human.

In other examples, the method may be used for lifting an object. As described previously herein, the object may be any of a number of objects including, for example, a vehicle, goods, building material, etc..

The present invention is further described by the following non-limiting examples:.

Specific examples of the invention will now be described by way of example only with reference to the accompanying figures, in which:.

<FIG> show a platform in the form of an inflatable mattress <NUM> in a deflated state and an inflated state, respectively. Subject <NUM> is shown on mattress <NUM>. The inflatable mattress comprises air inlet/air outlet <NUM> and longitudinally aligned channel <NUM>. Channel <NUM> runs the length of mattress <NUM>, although it is generally obscured when mattress <NUM> is in the deflated state.

When mattress <NUM> is inflated by pumping air through air inlet/outlet <NUM>, channel <NUM> is exposed. As shown in <FIG>, longitudinally disposed support element <NUM> may be inserted into channel <NUM>. While support element <NUM> may be inserted into channel <NUM> when mattress <NUM> is deflated, inflation of mattress <NUM> assists the insertion, especially when mattress <NUM> bears a weight, such as that provided by subject <NUM>. The combination of mattress <NUM> and support element <NUM> provides lifting system <NUM>.

Support element <NUM> comprises support element handles <NUM> at each end to assist in the lifting of the mattress with the subject thereon. Alternatively, the mattress may be lifted with optional mattress handles <NUM>.

In <FIG>, subject <NUM> may be lifted on the mattress <NUM> in the inflated or deflated state, as support element <NUM> can adequately support the subject when mattress <NUM> is deflated. This is therefore useful in situations where it is desirable to move or lift subject <NUM> on a rigid support. However, it is envisaged that in most cases, the subject will be lifted on mattress <NUM> in the inflated state as the inflated state can provide more support and comfort to subject <NUM>.

<FIG> shows inflatable mattress <NUM>. Inflatable mattress <NUM> is shown in a deflated state and includes a series of longitudinal compartments <NUM> in fluid communication with each other. Compartments <NUM> are inflated by pumping air through air inlet/outlet <NUM>. Entries to laterally aligned channels <NUM> are provided in the side of mattress <NUM>, although they are generally obscured when mattress <NUM> is in the deflated state. Channels <NUM> run the width of mattress <NUM>.

As shown in <FIG>, mattress <NUM> may be rolled when in the deflated state. Mattress <NUM> may also be folded, although is not illustrated. Rolling or folding mattress <NUM> allows for compact storage of mattress <NUM> and can also assist in the transfer of a subject onto mattress <NUM> as previously described herein.

<FIG> shows mattress <NUM> of <FIG> in an inflated state and in use with laterally disposed support elements <NUM>. In combination, mattress <NUM> and support elements <NUM> provide lifting system <NUM>. Once mattress <NUM> is inflated by pumping air into compartments <NUM> through air inlet/outlet <NUM>, the entries to channels <NUM> are exposed. Support elements <NUM> may be inserted into channels <NUM>. Support element 18a shows a support element that has been inserted into channel <NUM>.

Support elements <NUM> are provided with handles <NUM>. As illustrated, handle <NUM> has a greater diameter than channel <NUM>. Therefore for each support element <NUM>, at least one handle is removable, such that support element <NUM> may be inserted from one side into channel <NUM>. Handle <NUM> may then be attached to the inserted support element <NUM> (e.g. by threaded engagement, snap-locking, etc.), thereby permitting support element <NUM> to be gripped at each end. Handles <NUM> can also prevent support element <NUM> from falling out of channel <NUM>.

<FIG> shows mattress <NUM> of <FIG> in an inflated state and in use with support elements <NUM> that are connected at each end to frames <NUM>. Mattress <NUM> is inflated and support elements are inserted as described above in relation to <FIG>. In this instance, support elements <NUM> do not include handles, but rather connectors <NUM> for connecting to frames <NUM>. Connectors <NUM> are illustrated as holes in support elements <NUM> through which each frame <NUM> may be inserted.

Alternatively, the holes may be provided in frames <NUM> with support elements <NUM> inserted therein. Other connectors <NUM> may be used that allow support elements <NUM> to be connected to frames <NUM> including, for example, snap locks, clamps, spigoted, semicircular or purpose made connectors, connectors using locking or spring loaded pins to locate and maintain the connection, etc. Frames <NUM> may be retained in place by using stops (not illustrated) to prevent support elements <NUM> from disconnecting with frames <NUM>.

As frames <NUM> connects multiple support elements <NUM>, mattress <NUM> may be lifted by frames <NUM>. Support elements <NUM> reinforce mattress <NUM> as it is lifted, particularly when lifted with a weight thereon. Compartments <NUM> provide longitudinal strength to mattress <NUM>, particularly between channels <NUM>. Lifting system <NUM> is particularly suitable for use as a stretcher.

Frames <NUM> may comprise one or more lockable hinges <NUM> for moving mattress <NUM> between an unbent configuration as shown in <FIG> and a bent configuration as shown in <FIG>. Lockable hinge <NUM> may be provided anywhere along frame <NUM>, although it is preferable that lockable hinge <NUM> is provided in line with one of the channels, thereby allowing mattress <NUM> to be bent around one of the channels (or support element <NUM> inserted therein). Channels <NUM> provide particularly suitable bending points as channel <NUM> has less air volume in mattress <NUM> directly above or below channel <NUM>. Therefore the amount of air displacement required for mattress <NUM> to bend around channel <NUM> is reduced, and the bend is therefore more easily facilitated. Support element <NUM> in channel <NUM> also provides support along the bend when mattress <NUM> is lifted with a weight thereon.

<FIG> shows mattress <NUM> of <FIG> with the inflated mattress <NUM> in a bent configuration. Mattress <NUM> is moved between the unbent configuration of <FIG> and the bent configuration of <FIG> by unlocking lockable hinges <NUM> and translationally moving, for example, support element 18b relative to support element 18c (i.e. about the longitudinal axis of support element 18c). Lockable hinges <NUM> are then locked, thereby retaining the mattress in the bent configuration. Mattress <NUM> may then be lifted in the bent configuration via frames <NUM>.

As will be appreciated, frames <NUM> may be provided with a plurality of lockable hinges <NUM>, or the like, to allow mattress <NUM> to have different bent configurations (e.g. a seated configuration or a configuration to raise a subjects legs).

<FIG> shows mattress <NUM> of <FIG> in a deflated state on hospital bed <NUM>. Subject <NUM> has been placed on mattress <NUM> as described above (i.e. subject <NUM> is rolled on their side, mattress <NUM> in a semi rolled configuration is placed next to subject <NUM>, subject <NUM> is rolled onto their other side and onto the unrolled part of mattress <NUM>, the remaining rolled part of mattress <NUM> is unrolled and subject <NUM> is rolled back to their original position).

Mattress <NUM> is inflated by pumping air from air compressor <NUM> through hose <NUM> and into mattress <NUM> through air inlet/outlet <NUM>, as shown in <FIG>, subsequently raising subject <NUM> and exposing the entries of channels <NUM>. Air compressor <NUM> is provided on lifting device <NUM> of lifting system <NUM>.

Once mattress <NUM> is inflated, support elements <NUM> are inserted into channels <NUM>. Support elements <NUM> are then attached to attachment points <NUM> on lifting device <NUM>. Lifting device <NUM> includes cantilevered support legs <NUM> with wheels <NUM> attached thereto. Legs <NUM> allow lifting device <NUM> to be positioned close to hospital bed <NUM> and also provide the balance required for lifting system <NUM> to lift mattress <NUM> with subject <NUM> thereon. Once mattress <NUM> has been lifted from hospital bed <NUM>, the lifting device may be wheeled to another location (e.g. a surgical theatre, another bed, etc.). A support rail (not illustrated) may be attached to support elements <NUM> at the opposite end as lifting device <NUM> to ensure that subject <NUM> is retained on mattress <NUM>.

Once mattress <NUM> has been placed, for example, on another bed using lifting system <NUM>, support elements <NUM> are removed and mattress <NUM> is deflated by opening air inlet/outlet <NUM>. Mattress <NUM> may be removed from under subject <NUM> in the deflated state by reversing the method used to place subject <NUM> on mattress <NUM>.

Internal hoisting machinery <NUM> used in the lifting system <NUM> is known in the art. Lifting system <NUM> can allow for all support elements <NUM> attached thereto to be lifted at the same time and over the same distance (i.e. the entire mattress <NUM> may be lifted vertically) or lifting system <NUM> can allow for independent parallel translational movement of one or more support elements <NUM>.

<FIG> are shown without hospital bed <NUM> and subject <NUM> for ease of illustration. <FIG> shows mattress <NUM> in an unbent configuration and attached to lifting device <NUM> via support elements <NUM>. It will be appreciated that the support elements <NUM> act as cantilevers. By operating lifting device <NUM>, individual support elements <NUM> may be lifted to move mattress <NUM> from the unbent configuration to a bent configuration or between two different bent configurations, as illustrated in <FIG>. Accordingly, lifting device <NUM> may be used to move subject <NUM> from a reclined position to a seated position. Providing adjustable mattress configurations can aid in the comfort of subject <NUM> as well as offering health benefits e.g. it may be used to relieve pain or swelling, offset acid reflux, offset heartburn, improve digestion, improve breathing, relieve the heart muscle or stomach muscles, provide passive stretching, etc..

As lifting device <NUM> allows independent operation of hoisting machinery <NUM>, lifting device <NUM> in conjunction with mattress <NUM> can also be used to lift subjects from beds that have seated or other configurations or transfer subjects to beds that have seated or other configurations.

Lifting device <NUM> as shown allows for vertical actuation of support elements <NUM> attached thereto. Other lifting devices may be used that allow vertical and horizontal actuation of support elements <NUM> e.g. other lifting devices may be used to parallel translationally move one or more support elements about a longitudinal axis of another support element.

While mattress <NUM> is illustrated with longitudinal compartments <NUM> and a single air inlet/outlet, it will be appreciated that different mattresses with different compartment and valve arrangements (e.g. multi-valves) may be used. For example, different compartment arrangements and/or selective inflation of different compartments may be used to support the needs of different patients. Colour-coding or other marking of the compartments and/or valves can assist users in the selective inflation of the compartments and/or in the selection of an appropriate mattress for different patients.

<FIG> shows inflatable mattress <NUM> in an inflated state. Mattress <NUM> is particularly suitable for lifting subjects from seats or wheelchairs. Mattress <NUM> may include back portion <NUM> or may be substantially flat. Back portion <NUM> provides additional support when a subject is lifted on to mattress <NUM>. Mattress <NUM> includes compartments <NUM> to provide support between channels <NUM>.

As described above, it is envisaged that the subject will generally be placed on mattress <NUM> in a deflated state (not illustrated). Mattress <NUM> is inflated via air inlet/outlet <NUM>, thereby exposing the entries to channels <NUM>. Support elements <NUM> are then inserted into channels <NUM>. Support elements <NUM> include attachments <NUM> that may be attached to a suitable lifting device (not illustrated). Suitable lifting devices are disclosed in the prior art including, for example, <CIT>, <CIT> and <CIT>, and <CIT>. Attachments <NUM> may comprise, for example, hooks, holes or the like that allow support elements <NUM> to be attached to the lifting device. Alternatively, support elements <NUM> may be provided with handles (not illustrated) that enable lifting without a lifting device.

<FIG> shows mattress <NUM> being used for a subject <NUM> in a wheelchair <NUM>. Subject <NUM> is sitting on mattress <NUM> in an inflated state and support elements <NUM> have been inserted into channels <NUM>. Support elements <NUM> may be attached to a suitable lifting device (not illustrated) and mattress <NUM> lifted thereby. Back portion <NUM> provides rear support to subject <NUM> when mattress <NUM> is lifted.

Once subject <NUM> is transferred to the desired seat, support elements <NUM> may be detached from the lifting device and removed from mattress <NUM>. Optionally, mattress <NUM> is then deflated. As mattress <NUM> does not require rigid support components, mattress <NUM> in its deflated state will not cause subject <NUM> significant discomfort. Accordingly, subject <NUM> may remain seated on the mattress <NUM> for a prolonged period (e.g. the duration of a plane flight). In some examples, mattress <NUM> may be incorporated into the subject's clothing (not illustrated).

<FIG> illustrate an alternative lifting system <NUM>. The lifting system <NUM> includes a lower frame <NUM> having wheels or casters <NUM>. A vertical support <NUM> extends from the lower frame <NUM>.

The vertical support <NUM> connects with a support frame <NUM> via sleeve <NUM> extending from the support frame <NUM>. The sleeve <NUM> can be slid along the height of the vertical support <NUM> and locked into a selected height position. The support frame <NUM> releasably carries support elements <NUM>. As with previous examples, the support elements <NUM> are received in channels through the mattress <NUM> when the mattress <NUM> is in an inflated state. The support elements <NUM>, in this arrangement, act as cantilevers.

The support frame <NUM> includes lockable hinge portions <NUM> which allows the support frame <NUM> to adopt different configurations. In effect, this allows the support elements <NUM> to be parallel translationally moved with respect to one another; which, in turn, causes the mattress <NUM> to adopt different configurations, see <FIG>, <FIG>.

The lifting system <NUM> is shown with a pair of large wheels <NUM> arranged on a common axle member <NUM>. The axle member <NUM> is arranged to be releasably attached to the vertical support <NUM> via a clamp <NUM>. Consequently, the large wheels <NUM> can be selectively removed from the system <NUM> if, or when, they are not required. The axle member <NUM> can be reoriented by pivoting around the clamp <NUM> to change the position of the large wheels <NUM>, see <FIG>. The large wheels <NUM> allow a subject <NUM> to manually maneuver the system <NUM>, particularly when the support frame <NUM> is configured to adopt a sitting position, thereby acting like a wheel chair. As shown, the axle member <NUM> includes an additional strut support <NUM> for attachment to ends of support members <NUM>.

The wheels or casters <NUM> are adapted to be moved within recesses in the lower frame <NUM> (refer to <FIG>). Hence, when the wheels <NUM> are retained within these recesses and the sleeve <NUM> is moved to the lowest position on vertical support <NUM>, the mattress is positioned as close to the ground as possible (see <FIG>).

The mattress <NUM>, illustrated in <FIG>, differs from previous examples by the inclusion of thin stiffeners <NUM>, shown clearly in <FIG>. The stiffeners <NUM> can be made of any suitable flexible but strong material, such as carbon fibre. The stiffeners <NUM> can be bonded to the inside top of the mattress <NUM> by any suitable means, for example gluing or stitching. Alternatively, the upper fabric of the mattress could incorporate channels in which the stiffeners <NUM> can be inserted during manufacture. As will be appreciated, the stiffeners <NUM> offer additional support to a subject <NUM> and also a degree of rigidity to the mattress <NUM> when in a deflated state.

Variations on the mattress example are shown in <FIG>, <FIG>. In <FIG>, the mattress <NUM> includes mesh panels <NUM>. This offers a water permeable version of the mattress which would be particularly suited for bathing purposes. <FIG> illustrates an example of the mattress <NUM> having an orifice <NUM> suitably positioned to offer a toileting option for a subject, whereby a suitable waste catching receptacle could be arranged within or underneath the orifice <NUM>.

<FIG> illustrate a mattress <NUM>. The mattress <NUM> includes lateral supports <NUM> that extend laterally across the width of the mattress <NUM>. As shown, a lateral support <NUM> is preferably located adjacent the upper most edge of the mattress and/or at or adjacent to each folding/bending position of the mattress <NUM>. The lateral supports <NUM> are preferably located within a channel or sleeve formed within the mattress <NUM>. The lateral supports <NUM> serve to define the top, middle, lower and foot panels 406a, 406b, 406c, 406d of the mattress <NUM>.

The mattress <NUM> further includes side panels <NUM> which are inflatable. The side panels <NUM> are preferably arranged to be foldable with respect to adjacent respective top, middle, lower and foot panels 406a, 406b, 406c, 406d. When inflated, the side panels <NUM> preferably extend substantially perpendicularly to the plane of the adjacent top, middle and lower panels 406a, 406b, 406c, although a range of other angles are envisaged. The inflatable side panels <NUM> provide restraint and lateral support for the user and also provide stabilizing support for the mattress <NUM>. In this manner, the inflated side panels <NUM> act as "beams" and the load of the user can be effectively supported on the "beams" of the mattress <NUM> during lifting.

The mattress <NUM> is fitted with a longitudinal joining device <NUM> that extends along at least a part of the middle panel 406b, lower panel 406c and foot panel 406d. The joining device <NUM> is preferably a zipper or a hook and loop type fastener connection. The inclusion of the joining device <NUM> is advantageous because when released the middle and lower panels 406c can be split to facilitate placement of a user on the mattress <NUM>. This is particularly useful when the user is sitting in an upright position such as when on a chair.

The mattress <NUM> is also fitted with a toileting aperture. The aperture may be established by a panel <NUM> which can be folded or otherwise moved out of the way to effectively open the aperture in the middle panel 406b. The middle panel 406b provides the seat surface when the mattress <NUM> is folded into a seated configuration as shown in <FIG>. Alternatively, the panel <NUM> may be an inflatable panel which includes an opening that is revealed/opened when the panel <NUM> is deflated and closed when the panel is inflated.

The mattress <NUM> preferably includes foot panel 406d. The foot panel 406d establishes a surface which the user may press against to enable adjustment of their positioning on the mattress <NUM>. The foot panel 406d may be inflatable and is preferably of sufficient rigidity to enable the user to press against it and thereby adjust their body position on the mattress <NUM>.

The mattress <NUM> shown in <FIG> may be made of a range of different materials. However, it is envisaged that at least the top, middle and lower panels 406a, 406b, 406c of the mattress <NUM> include a top layer, a bottom layer and an intermediate spacer layer made of a spacer fabric. Such an arrangement enables the top, middle and lower panels 406a, 406b, 406c of the mattress <NUM> to be inflatable. The use of such a spacer layer negates the need to use baffles within the mattress <NUM> whilst allowing much higher inflation pressures to be used. This allows the mattress to be thinner than otherwise possible.

A spacer fabric is a fabric made from a complex three-dimensional construction made of two or more separate fabric layers connected vertically with the pile yarns or fabric layers keeping hollow space between adjacent connecting yarns or layers. Spacer fabrics are manufactured using methods such as weaving, braiding, stitching, warp knitting and weft knitting. A preferred form of spacer fabric for use in a mattress is a "drop stitch" fabric (commonly used for inflatable stand-up paddle boards).

The spacer layer is preferably made from a drop stich material. A wicking layer could also be incorporated to facilitate draw of perspiration and other liquids away from the body of the users.

It is envisaged that in other examples, the top, middle and bottom panels of the mattress need not necessarily be inflatable, whilst the side panels would be inflatable.

<FIG> depict versions of the system readily suitable for lifting a subject from bed and transferring them to the passenger seat of a vehicle. <FIG> shows a platform for the lifting system, the platform being in the form of an inflatable mattress <NUM> with four attachment structures in the form of lateral channels <NUM> spaced along the length of the mattress <NUM>. The top of the mattress <NUM> provides the elongate platform surface <NUM> to support the patient. This platform surface <NUM> has a back rest portion <NUM>, a seat portion <NUM> and leg rest portion <NUM> which dictates the orientation of the deflated mattress <NUM> when it is folded (or rolled or concertinaed) and laid next to the patient in bed (i.e. the back rest portion <NUM> adjacent the upper body).

<FIG> shows the lifting device <NUM> for the lifting system. The lifting device has four cantilevered tynes <NUM> that slide into the lateral channels <NUM> of the mattress <NUM>. The tynes <NUM> are cantilevered from a support frame <NUM> which in turn is movably mounted to a vertical support <NUM> via the sleeve <NUM>. The vertical support is rigidly fixed to the lower frame <NUM> with a broad base for stability and lockable castors <NUM> for convenient movement. A suitable lift actuator (not shown) acts on the sleeve <NUM> or other part of the support frame <NUM> to lift and lower the mattress <NUM> while cantilevered on the tynes <NUM>. The skilled worker will appreciate suitable lift actuators may be pneumatic, hydraulic, mechanical (e.g. screw thread driven), electrical or combinations of these, and each option will have particular advantages in terms of sophistication and ease of operation as well as varying costs and maintenance complexities. However, the lift actuator selected will need to have a load capacity well in excess of the weight of the patient, and any ancillary equipment they may carry with them.

<FIG> shows the mattress <NUM> being reconfigured by the lifting device <NUM> to support a subject <NUM> in a seated position. The support frame <NUM> has lockable hinges <NUM> at the cantilevered mounting points for the two inner tynes <NUM>. This allows relative movement of the tynes <NUM> such that the leg rest portion <NUM>, seat portion <NUM> and backrest portion <NUM> of the mattress <NUM> are in a chair configuration.

Similarly, <FIG> shows the mattress <NUM> selectively configured by the lifting device <NUM> to support the patient <NUM> in a supine position. The hinges <NUM> are adjusted and locked to position the tynes <NUM> such that the leg rest portion <NUM>, seat portion <NUM> and backrest portion <NUM> of the platform surface <NUM> are in a flat configuration.

<FIG> shows a further alternative with the patient <NUM> supported on the mattress <NUM> in a seated position with legs outstretched. <FIG> also shows a form of the support frame <NUM> with a lift cylinder <NUM> to telescopically engage the vertical support <NUM> to hydraulically, pneumatically or electrically lift and lower the support frame <NUM>. The control interface (not shown) may be operated by the patient <NUM>, possible via remote control or personal smart device. More sophisticated versions will provide powered operation of the adjustable/lockable hinges <NUM> providing the patient <NUM> with greater levels of autonomy.

This additional autonomy is beneficial for patients <NUM> that only require limited assistance. <FIG> shows the lifting system being used to transition a patient from a seated position to a standing position. The lift cylinder <NUM> elevates the support frame <NUM> and the adjustable hinges <NUM> move the back rest portion <NUM>, the seat portion <NUM> and the leg rest <NUM> guides the patient's feet <NUM> towards the unobstructed ground <NUM> within the lower frame <NUM>. With feet on the ground, the patient <NUM> need only straighten their legs and ease away from the mattress <NUM> into a standing position. For clarity, <FIG> shows the mattress <NUM> and lifting device <NUM> of the system inter-engaged, without the patient, and with the cantilevered tynes <NUM> shown in ghost line.

<FIG> is an arrangement of the lifting system modified to include wheelchair wheels, similar to the example shown in <FIG>. The wheelchair wheels <NUM> can be selectively engaged or disengaged from the ground using the lift cylinder <NUM> via the wheel axle <NUM>. This provides the patient <NUM> with the option to self-ambulate and greater independence.

<FIG> is a perspective view of the lifting system with a mattress <NUM> modified to allow showering or bathing. Similar to the example shown in <FIG>, the mattress <NUM> has a back rest portion <NUM>, seat portion <NUM> and leg rest portion <NUM> with inflatable peripheries <NUM>. Within the peripheries, is a mesh material <NUM> for draining water and quick drying to assist with washing the patient <NUM>. The cantilevered tynes <NUM> still extend through channels <NUM> (see <FIG>) defined by the inflatable peripheries <NUM>.

<FIG> is a passenger vehicle <NUM> with open side door <NUM> revealing the rear passenger seats <NUM>. These types of sliding van doors <NUM> provide good access to the seats and are often preferred for the transport of people with impaired mobility. It will appreciated that the cantilevered support of the mattress <NUM> by the lifting device <NUM> is well suited to guiding the patient <NUM> into the vehicle <NUM>, lowering the mattress <NUM> onto the seat <NUM>, and simply removing the tynes <NUM> (from the lifting device <NUM> or the mattress <NUM>).

Claim 1:
A lifting system for lifting a subject (<NUM>) supported in a desired position, the lifting system comprising:
a platform (<NUM>, <NUM>, <NUM>, <NUM>) for supporting the subject (<NUM>), the platform (<NUM>, <NUM>, <NUM>, <NUM>) having an elongate platform surface (<NUM>) selectively configurable in a flexible state allowing the elongate platform surface (<NUM>) to fold along a longitudinal line for positioning the platform (<NUM>, <NUM>, <NUM>, <NUM>) beneath the subject (<NUM>), and a rigid state to support the subject (<NUM>) in the desired position, the platform (<NUM>, <NUM>, <NUM>, <NUM>) also having one or more attachment structures (<NUM>); and,
a lifting device (<NUM>, <NUM>) for detachably engaging the one or more attachment structures (<NUM>) to elevate and lower the platform (<NUM>, <NUM>, <NUM>, <NUM>) cantilevered from the lifting device (<NUM>, <NUM>), the lifting device having a plurality of spaced cantilevered tynes (<NUM>), wherein the tynes (<NUM>) are selectively lockable in fixed positions relative to each other, and movable to change positions relative to each other.