Air bed with firmness control
Air bed arrangement
Air lumbar support device
Adaptive pressure control system
Air control system for air bed
Variable flow gas valve
Fluid filled mattress with height measuring and control devices Patent #: 4873737
ApplicationNo. 424863 filed on 10/20/1989
US Classes:5/710, Including plural, separately inflatable, distinct gas containing compartments5/672, Including pump means5/713, Variably pressurizable chambers (e.g., with pump)137/487.5, Electrically actuated valve417/38By liquid pressure sensor
ExaminersPrimary: Smith, Gary L.
Assistant: Saether, F.
Attorney, Agent or Firm
International ClassesF16K 031/12
AbstractA system for automatically controlling the pressure maintained in a plurality of fluid-filled cylinders supporting a sleep surface in order to maintain a desired degree of firmness/softness. In one mode, the system permits the user to set the desired level of firmness and then the system acts to maintain that level under the conditions encountered in use, either venting if an above-setting pressure is sensed or pumping to fill if a below-setting pressure is detected. In another mode, the user is enabled to manually activate either the pump or the vent in order to vary the firmness to his choice.