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.

The present invention relates to a novel oxygen tank flotation device. The device is designed to be used in a pool without worry of the oxygen tank tipping over into the water while exercising. The device comprises an injection-molded body preferably made from a urethane foam, in addition to a plastic superstructure. The body and superstructure have at least one continuous opening that receives an oxygen tank. The opening of the superstructure also comprises at least one ratcheting clip that secures the oxygen tank within the opening. The device further comprises a clip to secure a valve tool of the oxygen tank and a tether strap to keep the device floating near a user.

Methods and systems to provide breathing air to underwater divers in response to the divers' respiration at pressures less than 25 psi above atmospheric pressure during inspiration while delivering no or minimal air during exhalation, by controlling the actions of a pump during the time course of breathing. Methods and systems that sense a diver's need for breathing air, determine inhalation demand or exhalation state, and control the operation of a pump which delivers breathing gas to the diver via a tube. An integrated system for the same which incorporates at least an energy source, pump, air tube, breathing aperture, sensor, and logic processor is disclosed.

An improved underwater breathing and motion system is disclosed. The improved underwater breathing and motion system may include an air inlet for receiving air from a surface of the water, a system for assisting a diver with motion, and an insulated casing for housing various elements which include an air filtration unit for filtering the air received from the surface, a compressor for compressing the filtered air, a storage unit for storing the compressed air, and a regulator for regulating a pressure of the compressed air when the compressed air is transmitted to a mouthpiece for breathing by a diver.

Methods and systems to provide breathing air to underwater divers in response to the divers' respiration at pressures less than 25 psi above atmospheric pressure during inspiration while delivering no or minimal air during exhalation, by controlling the actions of a pump during the time course of breathing. Methods and systems that sense a diver's need for breathing air, determine inhalation demand or exhalation state, and control the operation of a pump which delivers breathing gas to the diver via a tube. An integrated system for the same which incorporates at least an energy source (26), pump (28), air tube (30), breathing aperture (10), sensor (20), and logic processor (24) is disclosed.

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.

A paddlecraft with a recess in its deck for a hookah diving compressor is disclosed where a user can paddle to a dive site and dive there without removing the compressor from the recess. An interchangeable insert for the recess supports different shapes and sizes of compressors. For a water-cooled compressor, the recess admits water from beneath the paddlecraft, or part of the compressor protrudes through the recess into the water beneath. A lid for the recess with an attachable tube feeds air to the compressor. An airline connection point is integrated into the paddlecraft, readily allowing connection and removal of an airline, or two or more airlines via an adaptor. The paddlecraft can also house an air reserve tank, allowing the user to dive without removing it. If the paddlecraft is an SUP, part of the SUP deck preferably functions as an air reserve tank.

A system is designed to increase diver safety in a high-risk environment containing one or more hazardous materials. The system includes chemically-hardened surface-supplied diving equipment designed to provide full environment isolation for the diver. The system also includes a dive helmet and a surface-return exhaust system, where the surface-return exhaust system includes a demand exhaust regulator that serves as a pressure-actuated valve to enable exhausting to a breathable atmosphere outside of a dive helmet instead of exhausting into the environment containing one or more hazardous materials. The system also includes retrofittable kits enabling the upgrading of contaminant-vulnerable materials of an existing dive helmet. The system also includes fluoroelastomeric materials and components to implement in a closed circuit dive system.

Methods and systems to provide breathing air to underwater divers in response to the divers' respiration at pressures less than 25 psi above atmospheric pressure during inspiration while delivering no or minimal air during exhalation, by controlling the actions of a pump during the time course of breathing. Methods and systems that sense a diver's need for breathing air, determine inhalation demand or exhalation state, and control the operation of a pump which delivers breathing gas to the diver via a tube. An integrated system for the same which incorporates at least an energy source, pump, air tube, breathing aperture, sensor, and logic processor is disclosed.

This disclosure provides a protective diving system for isolating a diver from a hazardous diving environment. The protective diving system can include a dry suit system including a dry suit and a surface exhaust valve coupled to the dry suit, and a return-surface exhaust assembly configured to exhaust gas from the dry suit system to a breathable atmosphere outside of the diving environment of the diver. The surface exhaust valve is configured to receive gas from the dry suit and exhaust gas to the return-surface exhaust assembly without exhausting to the surrounding diving environment. The protective diving system can further include one or more chemically-resistant components, where the chemically-resistant components include a fluoroelastomer.