초록 ▼

An improved patient support structure comprising an articulatable frame, a plurality of elongated inflatable sacks, some of the sacks having one or two comfort slots therein, a low pressure compressed air blower and a plurality of pipes and manifolds for carrying gas from the blower to the sacks. Th

An improved patient support structure comprising an articulatable frame, a plurality of elongated inflatable sacks, some of the sacks having one or two comfort slots therein, a low pressure compressed air blower and a plurality of pipes and manifolds for carrying gas from the blower to the sacks. The sacks are connected to the gas supply pipes and manifolds so as to be easily detachable therefrom. Each manifold has a variable muffler to control gas exhaust. An automatic switching circuit determines whether to power the brushless DC electric motor from a rectified AC power source or DC power supplied by batteries carried unobtrusively by the support structure. A multi-outlet, variable flow, gas valve connects to the blower to the pipes and comprises a housing defining at least two cylinder chambers and a discrete outlet for each cylinder chamber. A primary silencer is connected to each discrete outlet. The sacks rest atop a neoprene membrane which covers a planar upper surface of the frame. A zone valve control circuit has a motor driven integrated circuit and a further integrated circuit which chooses between a plurality of preset step-wise thumbwheel switches based upon a signal from a step-wise linear switch which is mechanically connected to one of the articulatable sections of the frame.

대표청구항 ▼

An improved patient support structure, comprising: (a) a frame; (b) a plurality of elongated inflatable sacks atop said frame; (c) gas supply means in communication with each of said sacks for supplying gas to same; and (d) control means associated with said gas supply means and said sacks, for cont

An improved patient support structure, comprising: (a) a frame; (b) a plurality of elongated inflatable sacks atop said frame; (c) gas supply means in communication with each of said sacks for supplying gas to same; and (d) control means associated with said gas supply means and said sacks, for controlling supply of gas to each of said sacks according to a predetermined pressure profile across said plurality of sacks and according to a plurality of predetermined combinations of said sacks, each said combination of sacks defining a separate support zone, and said control means comprising at least one gas flow muffler in communication with said gas supply means; wherein said gas flow muffler defines a gas flow tube having a gas flow restriction space adjacent one end thereof, said gas flow restriction space being variable to vary the gas flow through said muffler.