VENTILATOR
First Claim
1. A ventilator for replacing or supplementing a patient'"'"'s breathing, comprising:
- a turbine for generating a positive pressure air flow;
a control valve comprising a proportional obstacle valve having a stopcock rotationally movable by motor, the control valve including an inlet, an outlet and a bypass passageway, the proportional obstacle valve operating to control the flow of air from the inlet through the bypass passageway and outlet; and
means for directing air flowing from the control valve outlet to the patient.
1 Assignment
0 Petitions
Accused Products
Abstract
A ventilator to replace or supplement a patient'"'"'s breathing includes a control valve in the form of a proportional obstacle valve (POV) to provide improved air flow control and ventilator operation reliability. The POV includes an inlet, an outlet and a bypass. A stopcock controlled by a stepper motor directs the flow of air through the bypass and outlet permitting the turbine to operate a constant RPM yet allowing control of the airflow to a patient. The ventilator also includes inhalation and exhalation valve assemblies which improve air flow control and are easy to manufacture. The inhalation valve includes an orifice disk to allow pressure sensors to move accurately measure air flow. The exhalation valve assembly includes wings to reduce turbulence and enhance sensor accuracy. The exhalation valve assembly is arranged to have warm air from cooling the turbine blow over the assembly to reduce the possibility of condensation forming therein. The ventilator also includes an improved power supply with redundant sources of power.
101 Citations
20 Claims
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1. A ventilator for replacing or supplementing a patient'"'"'s breathing, comprising:
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a turbine for generating a positive pressure air flow; a control valve comprising a proportional obstacle valve having a stopcock rotationally movable by motor, the control valve including an inlet, an outlet and a bypass passageway, the proportional obstacle valve operating to control the flow of air from the inlet through the bypass passageway and outlet; and means for directing air flowing from the control valve outlet to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A ventilator for replacing or supplementing a patient'"'"'s breathing, comprising:
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means for generating a positive pressure air flow to be delivered to the patient; means for cooling the generating means and producing an air flow of heated air; an exhalation valve assembly for monitoring the flow of air exhaled by the patient; and means for directing the flow of heated air over the exhalation valve assembly to warm the assembly thereby reducing the probability of condensation forming therein. - View Dependent Claims (15, 16, 17)
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18. A ventilator for replacing or supplementing a patient'"'"'s breathing comprising:
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means for generating an air flow to be delivered to the patient; an inhalation strut assembly having an area of reduced diameter in the form of an orifice disk, the inhalation strut assembly including at least one pressure sensor positioned on each of the inlet and outlet side of the orifice disk; and an exhalation valve assembly including an exhalation strut, the exhalation strut having an area of reduced diameter which includes therein a plurality of wings extending radially inwardly to reduce air flow turbulence. - View Dependent Claims (19, 20)
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Specification