| 摘要 |
A decubitis mat includes a plurality of individual cells ( 16 which are pressurized by air. A polymer sensor/vent structure ( 20 ) is mounted on the top surface of each cell and defines a plurality of polymer filled channels ( 28 ) and a vent valve ( 26 ) which is biased to a closed position. As a body resting on the mat heats the polymer, it undergoes a phase change an expands, causing biasing forces ( 30 ) which bias the vent valve to open, permitting air in the cell to be released providing air flow to the body. |
