DEVICES, SYSTEMS AND METHODS FOR OPERATION OF BREATHING APPARATUSES IN MULTIPLE MODES
First Claim
1. A breathing system comprising:
- a source of pressurized breathing gas;
a regulator assembly comprising a valve assembly, an inlet for connection to a source of pressurized breathing gas, an outlet to provide breathing gas to a user and a valve assembly actuator for controlling flow of breathing gas between the inlet and the outlet via the valve assembly based at least in part on the respiration of the user;
an actuator via which flow of pressurized breathing gas from the source of pressurized breathing gas to the inlet of the regulator assembly is started when the actuator is placed in a first state and is stopped when the actuator is placed in a second state;
a facepiece comprising a first port adapted to be placed in fluid connection with the outlet of the regulator assembly to introduce pressurized breathing gas into the facepiece, a second port adapted to be connected to an air purifying system; and
an exhaust valve through which the user'"'"'s exhausted breath can exit the facepiece; and
a pressure adjustment mechanism in operative connection with the exhaust valve and operable to adjust the internal facepiece pressure required to open the exhaust valve, the pressure adjustment mechanism including a communication link in communicative connection with the actuator such that the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve independently of respiration of the user to a first pressure when the actuator is in the first state and the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve to a second pressure when the actuator is in the second state, the first pressure being higher than the second pressure.
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Accused Products
Abstract
A breathing system with a facepiece that includes a first port adapted to be placed in fluid connection with the outlet of a regulator assembly to introduce pressurized breathing gas into the facepiece; a second port adapted to be connected to an air purifying system; and an exhaust valve through which the user'"'"'s exhausted breath can exit the facepiece. The breathing system also includes a pressure adjustment mechanism that includes a communication link in communicative connection with an actuator such that the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve, independently of the respiration of the user, to a first pressure when the actuator is in the first state, to a second pressure when the actuator is in the second state. The first pressure is higher than the second pressure.
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Citations
16 Claims
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1. A breathing system comprising:
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a source of pressurized breathing gas; a regulator assembly comprising a valve assembly, an inlet for connection to a source of pressurized breathing gas, an outlet to provide breathing gas to a user and a valve assembly actuator for controlling flow of breathing gas between the inlet and the outlet via the valve assembly based at least in part on the respiration of the user; an actuator via which flow of pressurized breathing gas from the source of pressurized breathing gas to the inlet of the regulator assembly is started when the actuator is placed in a first state and is stopped when the actuator is placed in a second state; a facepiece comprising a first port adapted to be placed in fluid connection with the outlet of the regulator assembly to introduce pressurized breathing gas into the facepiece, a second port adapted to be connected to an air purifying system; and
an exhaust valve through which the user'"'"'s exhausted breath can exit the facepiece; anda pressure adjustment mechanism in operative connection with the exhaust valve and operable to adjust the internal facepiece pressure required to open the exhaust valve, the pressure adjustment mechanism including a communication link in communicative connection with the actuator such that the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve independently of respiration of the user to a first pressure when the actuator is in the first state and the exhaust pressure adjustment mechanism sets the internal facepiece pressure required to open the exhaust valve to a second pressure when the actuator is in the second state, the first pressure being higher than the second pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A facepiece for use in a breathing system comprising:
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a first port adapted to be placed in fluid connection with an outlet of a regulator assembly to introduce pressurized breathing gas into the facepiece from a source of pressurized breathing gas; a second port adapted to be connected to an air purifying system; an exhaust valve through which the user'"'"'s exhausted breath can exit the facepiece; and a pressure adjustment mechanism in operative connection with the exhaust valve and operable to adjust the internal facepiece pressure required to open the exhaust valve, the pressure adjustment mechanism including a communication link adapted to be placed in communicative connection with an actuator, the actuator controlling flow of pressurized breathing gas from the source of pressurized breathing gas to the regulator assembly such that flow is started when the actuator is placed in a first state and flow is stopped when the actuator is placed in a second state, the pressure adjustment mechanism setting the internal facepiece pressure required to open the exhaust valve independent of respiration of the user to a first pressure when the actuator is in the first state and the pressure adjustment mechanism setting the internal facepiece pressure required to open the exhaust valve to a second pressure when the actuator is in second state, the first pressure being higher than the second pressure. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification