Mouthpiece with coupler

A second stage regulator for conveying a breathable gas to a diver comprising:

• a regulator housing having an inhalation chamber, a port opening, a first connection member, and a demand valve in communication with said inhalation chamber that releases said breathable gas to said port opening in response to inhalation through said port opening;
• and
• a mouthpiece attachable to said regulator housing, said mouthpiece comprising:
• a unitary housing having an inlet opening, a mouthgrip opening, and a second connection member, said second connection member adapted to engage said first connection member;
• and
• at least one fluid pathway in said unitary housing adapted to establish one-way respiratory communication with said mouthgrip opening;
• wherein said at least one fluid pathway includes a no-return valve adapted to establish a gap through which a fluid may pass, wherein the distance between the geometric center of said inlet opening and any portion of said gap is less than 2.5 inches.

A second stage regulator for conveying a breathable gas to a diver comprising:

• a regulator housing having an inhalation chamber, a port opening, a first connection member, and a demand valve in communication with said inhalation chamber that releases said breathable gas to said port opening in response to inhalation through said port opening;
• and
• a mouthpiece attachable to said regulator housing, said mouthpiece comprising:
• a unitary housing having an inlet opening, a mouthgrip opening, and a second connection member, said second connection member adapted to engage said first connection member;
• and
• at least one fluid pathway in said unitary housing adapted to establish one-way respiratory communication with said mouthgrip opening;
• wherein said first connection member and said second connection member comprise the two halves of a locking connector.

A second stage regulator for conveying a breathable gas to a diver comprising:

• a regulator housing having an inhalation chamber, a port opening, a first connection member, and a demand valve in communication with said inhalation chamber that releases said breathable gas to said port opening in response to inhalation through said port opening;
• and
• a mouthpiece attachable to said regulator housing, said mouthpiece comprising:
• a unitary housing having an inlet opening, a mouthgrip opening, and a second connection member, said second connection member adapted to engage said first connection member;
• and
• at least one fluid pathway in said unitary housing adapted to establish one-way respiratory communication with said mouthgrip opening;
• wherein said regulator housing further comprises:
• an exhaust opening adapted to establish fluid communication between said inhalation chamber and the ambient;
• and
• a sealing member to block flow through said exhaust opening in both directions.

A mouthpiece for a breathing device comprising:

• a unitary housing having a mouthgrip opening and a respiratory fluid pathway;
• a flow-through coupler removably insertable into said respiratory fluid pathway, said flow-through coupler including a first half of a two-portion locking connector;
• and
• a no-return valve adapted to establish one-way respiratory fluid communication with said mouthgrip opening;
• wherein said flow-through coupler is adapted to convey a respiratory gas during at least some portion of the respiratory cycle.

A mouthpiece for a breathing device comprising:

• a unitary housing having a mouthgrip opening and a respiratory fluid pathway;
• a flow-through coupler removably insertable into said respiratory fluid pathway, said flow-through coupler including a first half of a two-portion locking connector;
• and
• an adapter having a first portion comprising the mating half of said two-portion locking connector and a second portion adapted to engage the respiratory port tube of a breathing device;
• wherein said flow-through coupler is adapted to convey a respiratory gas during at least some portion of respiratory cycle.