Abstract:
An inflatable bed system ( 1 ) includes a primary inflatable section ( 2 ) having a centrally located abdomen cavity shaped to allow a user&#39;s abdomen to be positioned therein. The system further includes a secondary inflatable section ( 3 ), which is independently inflatable and positioned inside the cavity. At least one tertiary inflatable section ( 15,22 ) is provided to allow further configuration of the bed. The bed may be inflated by a pump that is operatively connected with a valve which directs the movement of air into each of the inflatable sections under user selection.

Description:
FIELD OF THE INVENTION 
       [0001]    The invention relates to inflatable air mattresses, particularly those designed to allow a pregnant woman to sleep or rest comfortably. 
       BACKGROUND 
       [0002]    Specially designed and configured inflatable air mattresses for providing a comfortable and healthy resting or sleeping environment for pregnant women have a long history of development. As is well known, as a pregnancy progresses a woman&#39;s ability to find a comfortable resting position on conventional mattresses decreases significantly. In past years, this has led to the development of many types of mattresses having a suitably located central cavity to accommodate the distended abdomen. However, the degree and orientation of abdomen expansion changes dramatically over time, and a mattress with a more or less static cavity size, or other fixed attributes, cannot provide the needed comfort and other health benefits for the full range of development. 
         [0003]    In recent years, air mattresses of various types have been proposed, some of which have moved the pregnancy mattress art in useful directions. The basic ability of a variably inflatable air mattress does allow for a certain amount of dynamic accommodation over time. 
       SUMMARY OF THE INVENTION 
       [0004]    Disclosed is an inflatable bed system comprising a primary inflatable section, the primary inflatable mattress section having a centrally located abdomen cavity shaped to allow a user&#39;s abdomen to be positioned therein; a secondary inflatable section, the secondary section being independently inflatable and positioned inside the cavity; and at least one tertiary inflatable section. 
         [0005]    In one form the at least one tertiary inflatable section is provided to allow for further flexibility in the configuration of the bed. In one form the tertiary inflatable section is positioned around at least a portion of the periphery of the cavity. 
         [0006]    In a particular form the cavity is oval and the tertiary inflatable section comprises an oval loop. 
         [0007]    In one form the at least one tertiary inflatable section is wedge-shaped and positioned at the foot of the bed to provide a leg rest to elevate the feet of a user. In one form the bed system includes the wedge-shaped tertiary system in addition to a tertiary inflatable system to further configure the shape of the cavity. 
         [0008]    In one form a surface layer is positioned above primary mattress section. In one form the surface layer extends over the primary inflatable mattress section and includes a surface cavity adapted to align with the abdomen cavity. 
         [0009]    In one form the inflatable bed system further comprises a valve which directs the movement of air into each of the inflatable sections, and a pump operatively connected to the valve. 
         [0010]    In one form the valve is adapted to direct air flow from the pump into a selected inflatable section upon selection of the inflatable section by a user. In one form the valve is controlled manually. In one form, the pump is activated by a remote control. 
         [0011]    The inflatable bed system has the benefit of providing an inflatable bed with an abdominal cavity which is adapted to be adjusted in depth, firmness and diameter. 
         [0000]    In some forms the system allows a user to adjust the firmness and to significantly change the diameter of the cavity and the pressure at the periphery of the cavity. In some forms the system allows a user to adjust the position of their legs. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]    In order that the invention may be more readily understood, preferred embodiments of it are described below with reference to the accompanying drawings, in which: 
           [0013]      FIG. 1  is a perspective view of an inflatable bed system of one embodiment of the present invention; 
           [0014]      FIG. 2  is a perspective view of an inflatable bed system of one embodiment of the present invention; 
           [0015]      FIG. 3  is a top side view of the bed system of  FIG. 2 ; 
           [0016]      FIG. 4  is a side perspective view of the bed system of  FIG. 2 ; 
           [0017]      FIG. 5  is a side perspective view of the bed system of  FIG. 2 ; 
           [0018]      FIG. 6  is a top view of the bed system of  FIG. 2 ; 
           [0019]      FIG. 7  is a side perspective view of the bed system of  FIG. 2 ; 
           [0020]      FIG. 8  is a side perspective view of the bed system of  FIG. 2 ; 
           [0021]      FIG. 9  is a top perspective view of detail of an inflatable bed system of a second embodiment of the present invention; 
           [0022]      FIG. 10  is a top perspective view of detail of the bed system of  FIG. 9 ; 
           [0023]      FIG. 11  is a perspective view of an inflatable bed system of a third embodiment of the present invention; 
           [0024]      FIG. 12  is a side cross sectional view of an inflatable bed system of a fourth embodiment of the present invention; 
           [0025]      FIG. 13  is a cross-sectional view of the inflatable bed system of  FIG. 12 ; 
           [0026]      FIG. 14  is a cross-sectional view of the inflatable bed system of  FIG. 12 ; 
           [0027]      FIG. 15  is a cross-sectional view of the inflatable bed system of  FIG. 12 ; 
           [0028]      FIG. 16  is a top view of the remote control of one embodiment of the invention. 
           [0029]      FIG. 17  is a side detail view of the valve and pump of one embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0030]    Referring to the Figures, disclosed is an inflatable bed system  1 . The inflatable bed system is particularly well suited to being used as a mattress for sleep or rest during pregnancy or in other circumstances when a user&#39;s abdomen is particularly large or when a user needs to raise their legs. 
         [0031]    The inflatable bed system  1  comprises a primary inflatable mattress section  2  which makes up the base of the mattress. The primary inflatable mattress section  2  is shaped as a rectangular prism and is sufficiently wide and deep to allow a user to comfortably rest thereon. The primary inflatable mattress section  2  is composed of any flexible and air impermeable material, for example high quality PVC. The surface has a soft velour finish. The inflatable bed system  1  is adapted to be filled with air. 
         [0032]    The primary inflatable mattress section  2  includes an abdomen cavity  3 . The abdomen cavity  3  is positioned centrally on the primary inflatable mattress section  2  and extends downwardly into the primary inflatable mattress section  2 . The abdomen cavity  3  is positioned such that a user lying on their stomach would find their abdomen was naturally positioned within the abdomen cavity  3 . The abdomen cavity  3  is sufficiently deep to allow a woman in the last trimester of her pregnancy to position her abdomen within the abdomen cavity  3 . 
         [0033]    A secondary inflatable section  5  is positioned within the cavity. The secondary inflatable section  5  is composed of the same material as the primary inflatable section  2  but is independently inflatable. The secondary inflatable section  5  is sized such that when inflated it substantially fills the abdomen cavity  3 . 
         [0034]    The inflation of the primary inflatable mattress section  2  and the secondary inflatable section  5  is controlled by a pump  10  which is positioned within the primary inflatable section. The pump  10  is connected with the primary inflatable mattress section  2  and the secondary inflatable section  5  via a valve  11 . The valve  11  is controlled by a controller  12  positioned on the side of the primary inflatable mattress section  2 . The controller  12  activates the valve  11  to direct air flow from the pump  10  into the selected inflatable section. 
         [0035]    The pump  10  is controlled by a remote control  13  which is adapted to control the inflation and deflation of each of the inflatable sections. The pump is powered by the electrical mains through a power cord  25 . 
         [0036]    In a first embodiment as best shown in  FIGS. 1 through 8 , the inflatable bed system  1  includes one or more tertiary inflatable sections to further configure the profile of the bed under use control. In the illustrated form, one of the tertiary inflatable sections comprises a wedge shaped inflatable leg rest  15  which is positioned on the foot of the primary inflatable mattress section  2 . When the leg rest  15  is inflated it allows a user to lie on her back on the inflatable bed system  1  while having her legs raised. 
         [0037]    As best seen in  FIG. 8 , the wedge shaped inflatable leg rest  15  is moveable with respect to the inflatable mattress section  2  to allow for a user to position the leg rest  15  at a position that is most comfortable. For example, the leg rest  15  could be positioned to raise the feet of a user, or to simply raise the knees of the user. The leg rest  15  is inflatable and deflatable such that it can be utilised at varying heights as required by the user. 
         [0038]    The inflation and deflation of the leg rest  15  is also controlled by the pump  10  which is activated by the remote control  13 . The valve  11  can be positioned to direct air flow from the pump into or out of the leg rest  15 . 
         [0039]    In this embodiment, the inflatable bed system  1  further includes a surface layer  18 . The surface layer  18  is composed of flocked material and is sufficiently comfortable to allow rest. The surface layer  18  includes a surface cavity  19  which extends through the surface layer  18 . The surface cavity  19  is shaped and positioned such that it can be aligned with the abdomen cavity  3  in the inflatable primary mattress section  2 . 
         [0040]    The surface layer  18  also extends over the leg rest  15  such that upon inflation of the leg rest  15  the surface layer  18  is moved upwardly at the point where the leg rest  15  is positioned. The surface layer  18  is sufficiently flexible to allow it to fall comfortably over the leg rest  15  and sufficiently rigid to provide a consistent leg rest section  20  over the leg rest  15 . 
         [0041]    In one embodiment, as best shown in  FIGS. 12 through 15 , the leg rest section  20  over the leg rest  15  is attached with the surface layer  18  by means of a clip  23 . 
         [0042]    In one embodiment as best shown in  FIGS. 14 and 15 , an additional pillow  24  can be positioned under the surface layer  18  to allow for comfortable resting on the back with the legs raised or on the front with the legs lowered. 
         [0043]    In one embodiment the surface layer  18  is connected with the primary mattress section  2  by means of clips positioned on the primary mattress section  2 . 
         [0044]    In one embodiment the primary mattress section  2  includes concave breast sections  21  to allow a user to comfortable position her breasts when lying on her stomach. 
         [0045]    In a second preferred embodiment which is best shown in  FIGS. 9 and 10 , the inflatable bed system  1  further includes a tertiary inflatable system in the form of an inflatable ring  22  which is positioned to circle the periphery of the abdomen cavity  3  in primary mattress section  2 . The inflatable ring  22  is independently inflatable by means of the pump  10 . 
         [0046]    The inflatable ring  22  circles the periphery of the abdomen cavity  3  such that the abdomen cavity  3  can be widened gently. The inflatable ring  22  further provides a gentle gradation on the sides of the abdomen cavity  3  which allows for the support of the abdomen within the abdomen cavity  3 . The bed system  1  with the inflatable ring  22  can also provide to other features of the earlier embodiment including the inflatable leg rest  15 . 
         [0047]    The valve  11  is adapted such that it can direct air flow to or from the pump  10  into any one of the inflatable sections of the inflatable bed system  1 . When the user selects on the valve controller  12  that the valve inflate or deflate the secondary inflatable section  5  within the abdomen cavity  3 , the valve  11  directs air flow from the pump  10  into the secondary inflatable section  5 . The remote control  13  for the pump  10  can then be utilised to accurately direct the necessary amount of air into the secondary inflatable section  5 . This allows a user to lie on her stomach on the inflatable bed system  1  and to inflate the secondary inflatable section  5  within the abdomen cavity  3  such that her abdomen is comfortably supported within the abdomen cavity  3 . 
         [0048]    The user can then elect to inflate or deflate the inflatable ring  22  at the periphery of the abdomen cavity  3  to provide sufficient and comfortable support by selecting that section on the valve controller  12  and then utilising the remote control to allow the pump  10  to control the amount of air in the inflatable ring  22 . 
         [0049]    Alternatively or in addition to, a user can elect to inflate the leg rest  15 . The user first inflates the secondary inflatable section  5  positioned within the abdomen cavity  3  completely, then selects the leg rest  15  with the valve controller  12 . Lying on her back she utilises the remote control  13  to control the pump  10 . The valve  11  directs air flow from the pump  10  into the leg rest  15  allowing the user to inflate the leg rest  15  to a comfortable level. 
         [0050]    There is optional manual control to inflate or deflate each section of the inflatable bed system. 
         [0051]    It is to be understood that a reference herein to a prior art document does not constitute an admission that the document forms part of the common general knowledge in the art in Australia or in any other country. 
         [0052]    In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.