| 摘要 |
<p>A device 10, suitable inflating and deflating an air chamber in an aircraft seat 9 or hospital bed, comprises a pump (12, figure 2), at least one valve (13, figure 2) and a controller (14, figure 2) for controlling the pump and the state of the valve. The device is configured to pump air into one or more chambers 5 through one or more valves and one or more conduits 7. The controller may be configured to control the state of each valve 13 independently, thus producing a massaging effect by selectively inflating or deflating the air chambers. A pressure relief valve (15, figure 2) may also be included in the system. An occupancy sensor 20 may be fitted to allow the apparatus to operate only when the seat or bed is in use, and a timer to control the duration of the action.</p> |
