Portable ventilator apparatus
First Claim
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1. Ventilator apparatus comprising:
- a pump including a negative-pressure air inlet and a positive-pressure air outlet;
delivery means connected to the positive-pressure air outlet for delivering pressurized air to a patient;
and a relief valve communicating with said delivery means for preventing the pressure in the delivery means from rising above a predetermined peak value;
characterized in that said apparatus further includes;
s sensor located in said delivery means between the positive-pressure outlet of the pump and the patient for sensing the positive pressure in said delivery means;
and control means effective to energize said pump when the sensed positive pressure in the delivery means is below said peak value, and to deenergize the pump whenever the sensed positive pressure is substantially equal to said peak value.
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Abstract
A ventilator apparatus comprises a pump; a delivery conduit for delivering pressurized air to a patient; a relief valve preventing the pressure in the delivery conduit from rising above a predetermined peak value; a sensor for sensing the pressure in the delivery conduit; a storage device for storing the sensed peak pressure; and a comparator for continuously comparing the sensed pressure with the stored peak pressure and effective to energize the pump whenever the sensed pressure is below the stored peak pressure, and to deenergize the pump whenever the sensed pressure is generally equal to the stored peak pressure.
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Citations
15 Claims
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1. Ventilator apparatus comprising:
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a pump including a negative-pressure air inlet and a positive-pressure air outlet; delivery means connected to the positive-pressure air outlet for delivering pressurized air to a patient; and a relief valve communicating with said delivery means for preventing the pressure in the delivery means from rising above a predetermined peak value; characterized in that said apparatus further includes; s sensor located in said delivery means between the positive-pressure outlet of the pump and the patient for sensing the positive pressure in said delivery means; and control means effective to energize said pump when the sensed positive pressure in the delivery means is below said peak value, and to deenergize the pump whenever the sensed positive pressure is substantially equal to said peak value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Ventilator apparatus comprising:
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a pump including a negative-pressure air inlet and a positive-pressure outlet; delivery means connected to the positive-pressure air inlet for delivering pressurized air to a patient; a relief valve communicating with said delivery means for preventing the pressure in the delivery means from rising above a predetermined peak value; a sensor for sensing the pressure in said delivery means; a storage device for storing the peak pressure sensed by said sensor; and a comparator for continuously comparing the sensed pressure with the stored peak pressure and effective to energize the pump whenever the sensed pressure in the delivery means is below said stored peak pressure, and to deenergize the pump whenever the sensed pressure is generally equal to said stored peak pressure. - View Dependent Claims (8, 9, 10, 11)
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12. Ventilator apparatus comprising:
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a pump including a negative-pressure air inlet and a positive-air outlet; a delivery conduit connected to the positive-pressure air outlet for delivering pressurized air to a patient; a relief valve communicating with said delivery conduit for preventing the pressure in the delivery conduit from rising above a predetermined peak value; a sensor for sensing the pressure in said delivery conduit and for producing an electrical output corresponding to the sensed pressure; an electrical storage device for storing the peak pressured peaked by the sensor; and an electrical comparator for continuously comparing the sensed pressure with the stored peak pressure and effective to energize the pump whenever the sensed pressure in the delivery conduit is below said stored peak value, and to deenergize the pump whenever the sensed pressure is generally equal to said stored peak value. - View Dependent Claims (13, 14, 15)
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Specification