Hydrodynamic and ergonomic snorkel

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section and including a mouthpiece open to a breathing chamber, and a purge valve permitting one-way flow of air and water out of the breathing tube, and
• an upper breathing tube portion joined to the lower portion at a junction and including a check valve operable from an inactivated state permitting free movement of air to an activated state preventing movement of air into and out of the check valve, and an upper opening;
• and
• a radio located in a housing formed on the upper portion of the breathing tube.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section and including a mouthpiece open to a breathing chamber, and a purge valve permitting one-way flow of air and water out of the breathing tube, and
• an upper breathing tube portion joined to the lower portion at a junction and including a check valve operable from an inactivated state permitting free movement of air to an activated state preventing movement of air into and out of the check valve, and an upper opening;
• and
• a second breathing tube, the second breathing tube including a lower portion and an upper portion joined at a second junction, the lower portion of the second breathing tube connected to the lower portion of the first breathing tube and the upper portion of the second breathing tube connected to the upper portion of the first breathing tube,
• the lower portion of the second breathing tube including a second breathing chamber in communication with the mouthpiece and a second purge valve, the upper portion of the second breathing tube including a second check valve and the upper opening.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section including a straight edge and a curved edge, the lower portion including,
• a mouthpiece positioned in front of the straight edge and open to a breathing chamber, and
• a purge valve permitting one-way flow of air and water out of the breathing tube;
• and
• an upper breathing tube portion joined to a lower portion at a junction, the upper portion having an airfoil cross-section including sides and a leading tip and a trailing tip, the upper portion including,
• a check valve operable from an inactivated state permitting free movement of air to an activated state preventing movement of air into and out of the check valve, the check valve biased in the inactivated state and moveable to the activated state in response to forceful exhalation by a user into the mouthpiece, and
• an upper opening.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section including a straight edge and a curved edge, the lower portion including,
• a mouthpiece positioned in front of the straight edge and open to a breathing chamber, and
• a purge valve permitting one-way flow of air and water out of the breathing tube;
• and
• an upper breathing tube portion joined to a lower portion at a junction, the upper portion having an airfoil cross-section including sides and a leading tip and a trailing tip, the upper portion including,
• a check valve operable from an inactivated state permitting free movement of air to an activated state venting movement of air into and out of the check valve, and
• an upper opening;
• wherein the upper portion is formed from a rigid plastic material and the lower portion is formed from a flexible plastic shell supported by an internal wire.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section including a straight edge and a curved edge, the lower portion including,
• a mouthpiece positioned in front of the straight edge and open to a breathing, chamber, and
• a purge valve permitting one-way flow of air and water out of the breathing tube;
• and
• an upper breathing tube portion joined to a lower portion at a junction, the upper portion having an airfoil cross-section including sides and a leading tip and a trailing tip, the upper portion including,
• a check valve operable from an inactivated state permitting free movement of air to an activated state preventing, movement of air into and out of the check valve wherein the check valve includes a flap having a first end and a second end, the first end fixed to a lip formed inside the breathing tube and the second end moveable to obstruct the breathing tube, the flap supported by an adjustment screw projecting a distance into the breathing tube, such that varying the distance that the screw projects into the breathing tube determines the force necessary to move the second end of the flap to completely obstruct the airway, and an upper opening.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section including a straight edge and a curved edge, the lower portion including,
• a mouthpiece positioned in front of the straight edge and open to a breathing chamber, and
• a purge valve permitting one-way flow of air and water out of
• the breathing tube;
• and
• an upper breathing tube portion joined to a lower portion at a junction, the upper portion having an airfoil cross-section including sides and a leading tip and a trailing tip, the upper portion including,
• a check valve operable from an inactivated state permitting free movement of air to an activated state preventing movement of air into and out of the check valve, and an upper opening;
• a radio located in a housing formed on the upper portion of the breathing tube.

An apparatus including a breathing tube allowing a user to breathe while swimming comprising:

• a lower breathing tube portion having a substantially half-circular cross-section including a straight edge and a curved edge, the lower portion including,
• a mouthpiece positioned in front of the straight edge and open to a breathing chamber, and
• a purge valve permitting one-way flow of air and water out of the breathing tube;
• and
• an upper breathing tube portion joined to a lower portion at a junction, the upper portion having an airfoil cross-section including sides and a leading tip and a trailing tip, the upper portion including,
• a check valve operable from an inactivated state permitting free movement of air to an activated state preventing movement of air into and out of the check valve, and an upper opening,
• a second breathing tube, the second breathing tube including a lower portion and an upper portion joined at a second junction, the lower portion of the second breathing tube connected to the lower portion of the first breathing tube and the upper portion of the second breathing tube connected to the upper portion of the first breathing tube,
• the lower portion of the second breathing tube including a second breathing chamber in communication with the mouthpiece and a second purge valve, the upper portion of the second breathing tube including a second check valve and the upper opening.