Vent valve assembly
First Claim
1. A vent valve apparatus for use with a system for supplying, from a gas supply, breathable gas pressurized above atmospheric pressure to a human or an animal, the apparatus including:
- a gas washout vent;
a vent valve associated with the gas washout vent and being adapted to progressively restrict the flow area of the washout vent; and
a pressure sensitive control associated with the vent valve and being adapted to progressively cause said vent valve to restrict the flow area of the washout vent in response to increases in the pressure of the gas supply, thereby substantially regulating the flow of gas through the washout vent over a range of gas supply pressures.
4 Assignments
0 Petitions
Accused Products
Abstract
A vent valve apparatus for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal includes a gas washout vent, a vent valve adapted to progressively restrict the flow area of the washout vent, and a pressure sensitive vent valve controller. The controller is adapted to progressively cause the vent valve to restrict the flow area of the gas washout vent in response to increases in the pressure of the gas supply. Thereby, the vent valve substantially regulates the flow of gas through the washout vent over a range of gas supply pressures.
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Citations
8 Claims
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1. A vent valve apparatus for use with a system for supplying, from a gas supply, breathable gas pressurized above atmospheric pressure to a human or an animal, the apparatus including:
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a gas washout vent;
a vent valve associated with the gas washout vent and being adapted to progressively restrict the flow area of the washout vent; and
a pressure sensitive control associated with the vent valve and being adapted to progressively cause said vent valve to restrict the flow area of the washout vent in response to increases in the pressure of the gas supply, thereby substantially regulating the flow of gas through the washout vent over a range of gas supply pressures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification