Adjustable ventilation mattress

An adjustable ventilation mattress including an inflatable upper filling layer consisted of rows of inflatable plastic tubes arranged in the longitudinal direction, an inflatable lower filling layer consisted of rows of inflatable plastic tubes arranged in the transverse direction below the inflatable upper filling layer, an air permeable covering covered over the inflatable upper and lower filling layers, and a controller controlled to inflate or selectively inflate the inflatable plastic tubes of the inflatable upper filling layer and/or the inflatable lower filling layer according to a predetermined setting for changing the configuration of the mattress.

BACKGROUND OF THE INVENTION 
The present invention relates to mattresses and more specifically to an 
adjustable ventilation mattress which can be arranged into any of a 
variety of forms by for different purposes. 
The mattress of a normal bed is not adjustable on its configuration once it 
was made. The beds for patients are commonly made foldable. A foldable bed 
can help the patient to sit comfortably, however, it can not help the 
patient to turn the body over. 
SUMMARY OF THE INVENTION 
The principal object of the present invention is to provide an adjustable 
ventilation mattress which is comprised of rows of inflatable plastic 
tubes arranged in the longitudinal direction and supported above rows of 
inflatable plastic tubes being arranged in the transverse direction, an 
air permeable covering covered over the inflatable plastic tubes, and a 
controller controlled to inflate or selectively inflate the inflatable 
plastic tubes. Another object of the present invention is to provide an 
adjustable ventilation mattress which can be adjusted into any of a 
variety of forms for lying or sitting. Still another object of the present 
invention is to provide an adjustable ventilation mattress which can be 
automatically controlled to turn over the body of the person lying 
thereon. Still another object of the present invention is to provide an 
adjustable ventilation mattress which automatically gives off currents of 
air for ventilation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIGS. 1, 2 and 3, an adjustable ventilation mattress as 
constructed according to the preferred embodiment of the present invention 
generally comprised of an enclosed covering layer 30 filled with an 
inflatable upper filling layer 10 and an inflatable lower filling layer 
20, and a controller 40 controlled to inflate the inflatable upper and 
lower filling layers 10;20 or to draw off air therefrom. The covering 
layer 30 is made of a suitable air permeable material for comfortable 
lying of the body. The inflatable upper filling layer 10 is comprised of 
horizontal and vertical rows of inflatable plastic tubes closely arranged 
together along the length of the adjustable ventilation mattress, namely, 
in the longitudinal direction, each inflatable plastic tube having a 
respective air intake terminal 50 and a respective air outlet terminal 51 
respectively connected to the controller 40. The inflatable lower filling 
layer 20 is comprised of horizontal and vertical rows of inflatable 
plastic tubes closely arranged together along the width of the adjustable 
ventilation mattress, namely, in the transverse direction. Similar to the 
inflatable upper filling layer, each inflatable plastic tube of the 
inflatable lower filling layer 20 also has a respective air intake 
terminal 50 and a respective air outlet terminal 51 respectively connected 
to the controller 40. Further, ventilation tubes 31 with vent holes 32 may 
be connected to the inflatable upper filling layer 10 between each two 
inflatable plastic tubes and controlled by the controller 40 to give off 
air for ventilation. The controller 40 is automatically controlled through 
a timer and an automatic control circuit to inflate the inflatable plastic 
tubes of the inflatable upper and lower filling layers 10;20 and to give 
off air through the vent holes 32 on the ventilation tubes 31 for 
ventilation. As the automatic control circuit is of the known art and not 
within the scope of the present invention, it is not described in detail. 
When assembled, the inflatable plastic tubes of the inflatable upper 
filling layer 10 are arranged above and crossed over the inflatable 
plastic tubes of the inflatable lower filling layer 20 and covered within 
the covering layer 30. 
Referring to FIG. 4, by inflating the inflatable plastic tubes of the 
inflatable upper filling layer 10 and/or the inflatable plastic tubes of 
the inflatable lower filling layer 20 or selectively inflating part of the 
inflatable plastic tubes of the inflatable lower filling layer 20 only, 
the adjustable ventilation mattress is arranged into any of a variety of 
forms for sitting or resting the body at full length with the head or the 
legs lifted or with either side of the body supported on the covering 
layer 30 comfortably. As currents of air are continuously given off 
through the ventilation tubes 31, the adjustable ventilation mattress is 
constantly ventilated when it is in use. By controlling the amount of air 
being filled into the inflatable plastic tubes of the inflatable upper and 
lower filling layers 10;20, adjustable ventilation mattress is adjusted to 
the desired rigidity. Further, the present invention is most suitable for 
the patients who can not turn the body over on the bed. By means of 
setting the controller 40, the inflatable plastic tubes of the inflatable 
lower filling layers 20 are alternatively inflated and collapsed to change 
the adjustable ventilation mattress from form D to form E or from form F 
to form G, as shown in FIG. 4, or to change it in the reverse way, so as 
to turn over the body of the patient automatically.