Variable aperture venting for respiratory mask
First Claim
Patent Images
1. A respiratory mask having a variable flow venting, comprising:
- a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device comprises a hollow elastomeric truncated cone, said hollow elastomeric truncated cone having an internal diameter, an outer aperture, and an inner aperture forming a truncated end of said hollow elastomeric truncated cone, with said hollow elastomeric truncated cone being deformable by a gas pressure within said respiratory mask to change said internal diameter of said hollow elastomeric truncated cone.
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Abstract
A respiratory mask having a variable flow venting is provided according to the invention, including a gas supply hose, a mask shell adapted to output a gas to a respiratory system of a person, the mask shell adapted to be connected to the gas supply hose, and an exhaust gas flow volume regulating device which maintains a substantially constant gas flow volume out of the respiratory mask independent of an internal gas pressure inside the respiratory mask.
91 Citations
20 Claims
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1. A respiratory mask having a variable flow venting, comprising:
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a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device comprises a hollow elastomeric truncated cone, said hollow elastomeric truncated cone having an internal diameter, an outer aperture, and an inner aperture forming a truncated end of said hollow elastomeric truncated cone, with said hollow elastomeric truncated cone being deformable by a gas pressure within said respiratory mask to change said internal diameter of said hollow elastomeric truncated cone. - View Dependent Claims (2, 3, 4)
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5. A respiratory mask having a variable flow venting, comprising:
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a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device further comprises an actuator containing an electronically actuated member that is movable in relation to a vent aperture. - View Dependent Claims (6, 7, 8, 10)
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9. A respiratory mask having a variable flow venting, comprising:
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a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device comprises an actuator containing an electronically actuated member that is movable in relation to a vent aperture and in response to said internal gas pressure. - View Dependent Claims (11, 12)
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13. A respiratory mask having a variable flow venting, comprising:
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a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device comprises;
an actuator containing an electronically actuated member that is movable in relation to a vent aperture; and
a pressure sensor. - View Dependent Claims (14, 15, 16)
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17. A respiratory mask having a variable flow venting, comprising:
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a gas supply hose;
a mask shell adapted to output a gas to a respiratory system of a person, said mask shell adapted to be connected to said gas supply hose; and
a gas flow volume regulating device for substantially maintaining a substantially constant exhaust gas flow volume out of said respiratory mask independent of an internal gas pressure inside said respiratory mask, wherein said gas flow volume regulating device comprises;
an actuator containing an electronically actuated member that is movable in relation to a vent aperture;
a pressure sensor; and
a controller communicating with said actuator and said pressure sensor in order to vary an effective size of said vent aperture. - View Dependent Claims (18, 19, 20)
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Specification