Manually actuated talk valve for a respiratory device

1. An interface system for use in providing a flow of pressurized gas to a patient, the interface system comprising:

a patient interface structured to engage a nasal and/or oral orifice of a patient;

a conduit coupled to the patient interface, the conduit being disposed generally about a central axis and being structured to communicate the flow of pressurized gas to the patient interface; and

a valve mechanism operatively coupled to the patient interface or the conduit, the valve mechanism being structured to selectively impede the flow of pressurized gas to an airway of such a patient, wherein the valve mechanism includes a manually manipulated element to enable the patient to actuate the valve mechanism, wherein the valve mechanism comprises a gate member selectively moveable between a first position in which the gate member is structured to generally not impede the flow of pressurized gas to the patient and a second position in which the gate member is structured to impede the flow of pressurized gas to the patient, and wherein the gate member is biased toward the first position,

wherein the manually manipulated element comprises a switch portion adapted to move the gate member between the first position and the second position upon engagement of the switch portion by the patient, and

wherein the switch portion is:

(a) rotatable about another axis oriented generally perpendicular to the central axis,

(b) generally slidable in a direction parallel to the central axis, or

(c) rotatable about the central axis.

2. The interface system of claim 1 , wherein the gate member comprises a spring member disposed in a manner that biases the gate member in the first position.

3. The interface system of claim 1 , wherein the switch portion comprises:

(a) a lever disposed on an external portion of the mask or the conduit, or

(b) a collar member disposed on, and generally surrounding, an external portion of the conduit.

4. A conduit for use in providing a flow of pressurized gas to a patient, the conduit comprising:

(a) a housing having a first end and an opposite second end, the first end being structured to be coupled to a patient interface and the second end being structured to be coupled to a pressurized gas supply, the housing being structured to communicate the flow of pressurized gas therethrough; and

(b) a valve mechanism coupled to the housing, the valve mechanism comprising:

(1) a gate member selectively moveable between a first position in which the gate member is structured to generally not impede the flow of pressurized gas through the housing and a second position in which the gate member is structured to impede the flow of pressurized gas through the housing, and

(2) a manually manipulated element to enable the patient to actuate the valve mechanism,

wherein the gate member is biased toward the first position,

wherein the manually manipulated element comprises a switch portion being adapted to move the gate member between the first and the second position upon engagement by the patient, and

wherein the switch portion comprises a lever disposed on an external portion of the housing, or a collar member disposed on, and generally surrounding, an external portion of the housing.

5. The conduit of claim 4 , wherein the gate member is structured to be biased in the first position by the flow of pressurized gas.

6. The conduit of claim 4 , wherein the gate member comprises a spring member disposed in a manner that biases the gate member in the first position.