System and method of oxygen deficiency warning in a powered air purifying respirator
First Claim
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1. A powered air purifying respirator (PAPR), comprising:
- an electric motor mechanically coupled to a blower configured to draw ambient atmospheric air through one or more purifying elements for delivery to a face mask;
an oxygen sensor configured to detect oxygen concentration level in ambient atmospheric air;
an alarm device; and
a controller coupled to the oxygen sensor and to the electric motor, wherein the controller controls the electric motor, wherein the controller determines if the oxygen concentration is deficient by comparing the oxygen concentration level in the ambient atmospheric air to an ambient atmospheric air oxygen deficiency threshold, wherein the ambient atmospheric air oxygen deficiency threshold is based on altitude, and wherein the controller commands the alarm device to present an indication when the oxygen concentration is deficient.
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Abstract
A powered air purifying respirator (PAPR). The PAPR comprises an electric motor mechanically coupled to a blower, an oxygen sensor, an alarm device, and a controller coupled to the oxygen sensor and to the electric motor, wherein the controller controls the electric motor, wherein the controller determines if the oxygen concentration is deficient, and wherein the controller commands the alarm device to present an indication when the oxygen concentration is deficient.
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Citations
20 Claims
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1. A powered air purifying respirator (PAPR), comprising:
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an electric motor mechanically coupled to a blower configured to draw ambient atmospheric air through one or more purifying elements for delivery to a face mask; an oxygen sensor configured to detect oxygen concentration level in ambient atmospheric air; an alarm device; and a controller coupled to the oxygen sensor and to the electric motor, wherein the controller controls the electric motor, wherein the controller determines if the oxygen concentration is deficient by comparing the oxygen concentration level in the ambient atmospheric air to an ambient atmospheric air oxygen deficiency threshold, wherein the ambient atmospheric air oxygen deficiency threshold is based on altitude, and wherein the controller commands the alarm device to present an indication when the oxygen concentration is deficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A powered air purifying respirator (PAPR), comprising:
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an electric motor mechanically coupled to a blower configured to draw ambient atmospheric air for delivery to a face mask; an oxygen sensor configured to detect oxygen concentration level in ambient atmospheric air; an alarm device; an event store; and a controller coupled to the oxygen sensor, to the alarm device, to the event store, and to the electric motor, wherein the controller controls the electric motor, wherein the controller receives an indication of an oxygen concentration from the oxygen sensor, wherein the controller determines if the oxygen concentration is deficient by comparing the indication of the oxygen concentration to an ambient atmospheric air oxygen deficiency threshold, wherein the ambient atmospheric air oxygen deficiency threshold is based on altitude, wherein the controller commands the alarm device to present an indication and writes a record in the event store when it determines the oxygen concentration is deficient. - View Dependent Claims (12, 13, 14)
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15. A powered air purifying respirator (PAPR), comprising:
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an electric motor mechanically coupled to a blower configured to draw ambient atmospheric air through one or more purifying elements for delivery to a face mask; an oxygen sensor configured to detect oxygen concentration level in ambient atmospheric air; an alarm device; an event store; and a controller coupled to the oxygen sensor, to the alarm device, to the event store, and to the electric motor, wherein the controller controls the electric motor, wherein the controller receives an indication of an oxygen concentration from the oxygen sensor and determines if the oxygen concentration is deficient by comparing the indication of the oxygen concentration to an ambient atmospheric air oxygen deficiency threshold, wherein the ambient atmospheric air oxygen deficiency threshold is based on altitude, and wherein, when the controller determines the oxygen concentration is deficient, the controller commands the alarm device to present an indication of the oxygen deficiency and writes a record in the event store. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification