Alternating pressure pads

Details Alternating pressure pads Alternating pressure pads

2005-08-16

2005-08-16

Melius, Terry Lee (Department: 3628)

Beds

Mattress

Having confined gas

C005S710000, C005S714000

Reexamination Certificate

active

06928681

ABSTRACT:
An alternating pressure pad comprises at least two sets of inflatable cells, an air supply line to each set, a pump to circulate pressurized air through a circuit including the sets of cells and to return air from the cells to the pump, valve means for alternately causing inflation and deflation of each set, a sensor pad in the circuit through which pressurized air is passed and detecting means for detecting a reduction in air flow through the sensor pad to a level below a predetermined level and for increasing air pressure in the sets of cells to restore the air flow to a level above the predetermined level.

REFERENCES:
patent: 4391009 (1983-07-01), Schild et al.
patent: 5003654 (1991-04-01), Vrzalik
patent: 5109560 (1992-05-01), Uetake
patent: 5109561 (1992-05-01), Schild
patent: 5117518 (1992-06-01), Schild
patent: 5142717 (1992-09-01), Everard et al.
patent: 5189742 (1993-03-01), Schild
patent: 5396671 (1995-03-01), Stacy
patent: WO 89/08438 (1989-09-01), None

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