| 摘要 |
This invention is concerned with an improved air bed system. In this invention, the bed occupant can control the firmness of the bed. Two inflatable bladders (12, 14) are used with a pre-set pressure differential between them. The pressure in the lower bladder is always kept high enough to prevent bottoming of a bed occupant. The pressure in the upper bladder may be adjusted by the occupant to his or her own personal comfort level. The invention may also include various medical devices which are fluid powered, thus taking advantage of the presence of the pressurized working fluid. The invention may further include a warning circuit which senses the departure of an occupant from the bed and generates a warning signal in response thereto. |
