| 摘要 |
<p>The present invention relates to an inflatable cushion including an inflatable body, having an upper surface and a lower surface, said body including an air-impermeable skin defining a chamber, an elastic foam core within said chamber and a sealable air valve; and an external elastic foam layer substantially covering at least one of said upper and lower of surfaces; wherein the density and hardness of the foam core and of the elastic foam layer differ by no more than about 30%. It also relates to a mattress including the abovementioned inflatable cushion and further relates to an air valve assembly for use in the abovementioned inflatable cushion. The valve assembly includes: a valve body having a first end; a valve member adapted to seal an opening, the valve member having an open position in which the valve member allows an air passage through the opening, and a closed position in which the valve member seals the opening; an actuating means associated with the body and the valve member; wherein a first actuation of the actuating means causes the valve member to be in the open position, and a second actuation of the actuating means causes the valve member to return to its closed position, wherein the first and second actuation each involve an application of a force upon the actuating means toward the valve member. Figure I Figure 21 34, 31 3</p> |
