Bedsore-preventing air mattress controller
First Claim
1. A controller for a bedsore preventing air mattress including first and second groups of air cells inflatable and deflatable and a plurality of air discharging cells disposed between respective said air cells of said first and second groups, the controller comprising an air pump including coils for generating megnetomotive forces proportional to feed air amount of said pump in a plurality of stages, an air-flow change-over valve receiving fed air from said pump and communicating with said first and second groups of air cells for alternately inflating and deflating the groups, and an air shut-off valve communicating with said air discharging air cells for discharging said fed air thereout and halting said discharging and including an electric switch for changing over said generation of said megnetomotive forces of said air pump, said shut-off valve having means for actuating said electric switch for simultaneous operation therewith.
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Accused Products
Abstract
A bedsore-preventing air mattress controller provided with an air pump for generating a magnetomotive force in a plurality of stages proportional to the feed air amount of the pump, and with an electric switch for changing over the magnetomotive force of the pump and integrally assembled with an air shut-off valve for discharging and halting air, whereby the controller arrangement is simplified to effectively reduce the required number of parts for lowering manufacturing costs.
111 Citations
17 Claims
- 1. A controller for a bedsore preventing air mattress including first and second groups of air cells inflatable and deflatable and a plurality of air discharging cells disposed between respective said air cells of said first and second groups, the controller comprising an air pump including coils for generating megnetomotive forces proportional to feed air amount of said pump in a plurality of stages, an air-flow change-over valve receiving fed air from said pump and communicating with said first and second groups of air cells for alternately inflating and deflating the groups, and an air shut-off valve communicating with said air discharging air cells for discharging said fed air thereout and halting said discharging and including an electric switch for changing over said generation of said megnetomotive forces of said air pump, said shut-off valve having means for actuating said electric switch for simultaneous operation therewith.
Specification