| 摘要 |
An inflatable mattress has an upper layer of inflatable tubular sections (10) covered with a microporous vapour permeable material (14) and a rectangular lower base layer (12) formed into a matrix of blocks with discrete, separate, support surfaces (22) by means of intersecting channels (18, 20). The mattress also has means (32) for inflating at least one of the inflatable sections (10) at a first, higher pressure and at least one of the inflatable sections at a second, lower pressure and means for changing the sections to which the higher and lower pressures are applied. As the higher pressure is applied to a section (10) the foam blocks (12) located immediately below that section are deformed downwardly without producing any substantial deformation of adjacent blocks and thus without moving adjacent tubular sections. <IMAGE> |
