The invention relates to a valve system (10) for a breathing aid for swimmers, in particular for an inhalation valve, comprising a valve housing (1) and a valve diaphragm (2) in the valve housing (1); in a contact zone (3) preferably located in a central area of the valve diaphragm (2), the valve diaphragm (2) is disposed on a first end (4) of a fastening element (5); furthermore, from the contact zone (3), the valve diaphragm (2) runs at least partially at an angle in the direction of a second end (6) of the fastening element (5).

A method and system to deliver to a submerged diver only that amount of breathing gas volume and pressure required at the diver's depth by controlling the actions of a valve in response to inhalation demand. A sensing unit detects diver respiration, and a logic unit controls a valve to deliver breathing gas to the diver from a breathing gas source via a tube.

A method and system to deliver to a submerged diver only that amount of breathing gas volume and pressure required at the diver's depth by controlling the actions of a valve in response to inhalation demand. A sensing unit detects diver respiration, and a logic unit controls a valve to deliver breathing gas to the diver from a breathing gas source via a tube.

A detachable buoyant cross or clover design offers greater buoyancy and stability. The buoy snorkel may include threaded top and bottom fittings that may allow a flexible hose to be attached or detached through use of a quick connect mechanism, such as one or more cam locks. The buoy snorkel may be a single unit that provides for a flexible hose or breathing tube to be attached or detached on the top and bottom. The flexible hose may have buoyant support to keep the flexible hose or breathing tube afloat. The buoy snorkel may have a clover or cross-type design that may provide greater buoyancy and stability in and on the water.

A snorkel upper discharging head has a waterproof device. The snorkel upper discharging head comprises a snorkel upper discharging head body and a floating drum, an air inlet hole is arranged at the front end of the snorkel upper discharging head body and is sleeved with a sealing ring, the snorkel upper discharging head body is internally provided with an air duct communicated with the air inlet hole, circular arc sliding slots are arranged at the left and right inner sides of the snorkel upper discharging head body, the floating drum is clamped in the circular arc sliding slots, and a water seal face jointed with the sealing ring is arranged in the middle of the floating drum; the snorkel upper discharging head having the waterproof device not only has simple and compact structure and excellent waterproof effect, but is also eye-pleasing and fashionable in appearance.

A self-contained surface supplied air system preferably provided with backpack-wearable capability and automated setup functions for ease of use that is capable of recording valuable recreational and scientific data in an unobtrusive manner. The flotation tube process for the system can be automated to reduce setup time and electronically regulated to increase reliability and safety. The system allows recreational divers or their inherent equipment to be capable of recording valuable and reputable data in a manner that does not involve extra effort by the user. The disclosed system can use a miniature pH sensor design with automatic calibration for integration into the data recording device. In one embodiment, the novel hookah diving system comprises a portable body enclosing all necessary equipment and featuring automatic flotation tube inflation and deflation. An integrated data recording device collects physical data at points along the diver's tether preferably from the surface all the way to the depth of the diver.

The invention allows users to be totally submerged underwater with an adequate supply of air for extended periods of time without the use of regulators, pressure vessels, diaphragm pumps or compressors, internal combustion engines or external power sources. The apparatus includes a buoyant enclosure supporting a hollow air intake pipe with a sphere shaped screen mounted on the top. The bottom half of the screen has holes to allow air into an air intake tube and to drain water out. A low pressure blower and filter assembly with a rechargeable and easily replaceable lithium-ion battery are mounted inside the buoyant enclosure. Air is drawn into the low pressure blower suction and through an air filter delivering constant air flow to the individual through an attached flexible air supply hose. Three check valves constrain air flow supply unidirectional to the individual while venting excess air. A hand pump vacates water from the mouthpiece or mask and draws in purging air while the individual is submerged. For stability the apparatus has a low center of gravity creating a strong self-righting moment in calm or rough seas. For safety the apparatus has a grab handle and a tether line connection from the bottom of the buoyant enclosure.

The oxygen tank flotation device is a floating structure adapted for use in recreational water activities. The oxygen tank flotation device is adapted for use with respiratory equipment that is required for use during recreational water activities. The oxygen tank flotation device receives and stores respiratory equipment, such as an oxygen tank, in such a manner that the respiratory equipment will float when the oxygen tank flotation device is placed in a body of water. This arrangement allows the respiratory equipment to float near the user when the user is involved in recreational water activities. The oxygen tank flotation device comprises a vessel, a first float, and a second float.

Swim cap comprising a respirator, ear pockets housing headphones, a communication system comprising a microphone integrated in a mouthpiece and a Bluetooth system for enabling voice communication while swimming and avoiding turning the head to lift it out of the water to breathe.

A splash guard comprises a housing comprising a first aperture, a pivotal member comprising a pivot aim pivotally connected with the housing and a loading part connected with the pivot arm, a space surrounded by the pivot arm, the loading part, and the housing, a float member pivotally connected with the loading part and positioned in the space, and a closure member mounted on the first mounting portion and selectively covering the first aperture. The loading part has a side surface facing the housing and a pushing portion positioned on the side surface. The float member selectively abuts the pushing portion. The direction in which the float member pivots about the pivotal member and the direction in which the pivotal member pivots about the housing are reverse to each other. The splash guard is convenient in use and storage and provides safety and comfort to the snorkeler.