SCUBA diving equipment is composed of a heavy SCUBA pressure vessel, buoyancy compensation device and a heavy weight system. Together with a constricting exposure suit the current setup makes for a rather cumbersome system. Perfect buoyancy is a term used in SCUBA diving to describe the ability of the diver to maintain its vertical position in the water column. Doing so requires a thorough understanding of the governing physics principles as well as considerable practice time. Together, the cumbersome nature of standard SCUBA systems and the physical and mental requirements of operating said systems underwater are a commercial hurdle, preventing many individuals from entering the sport. The present invention provides systems that can significantly simplify both elements by allowing water to occupy some of the pressure vessel internal volume. Such a pressure vessel can be used as both the breathing gas source as well as a buoyancy control device, reducing or even eliminating the need for additional weights and a separate buoyancy compensation device. Embodiments of the present invention also comprise a control system and one or more sensors to provide an automatic buoyancy system.

SCUBA diving equipment is composed of a heavy SCUBA pressure vessel, buoyancy compensation device and a heavy weight system. Together with a constricting exposure suit the current setup makes for a rather cumbersome system. Perfect buoyancy is a term used in SCUBA diving to describe the ability of the diver to maintain its vertical position in the water column. Doing so requires a thorough understanding of the governing physics principles as well as considerable practice time. Together, the cumbersome nature of standard SCUBA systems and the physical and mental requirements of operating said systems underwater are a commercial hurdle, preventing many individuals from entering the sport. The present invention provides systems that can significantly simplify both elements by allowing water to occupy some of the pressure vessel internal volume. Such a pressure vessel can be used as both the breathing gas source as well as a buoyancy control device, reducing or even eliminating the need for additional weights and a separate buoyancy compensation device. Embodiments of the present invention also comprise a control system and one or more sensors to provide an automatic buoyancy system.

A backrest for scuba diving comprising a support element, a first strap strapping the support element to the diver's body and a second strap strapping an air cylinder to the support element. The support element has first slots passing the first strap and second slots passing the second strap. The first slots delimit a right portion and respectively a left portion of the first strap, independently adjustable over the right shoulder and right side and respectively over the left shoulder and left side of the diver. The support element comprises a support plate, a right angular profile having a first and second right wing, a right bracket supported by the first right wing, a left angular profile having a first and second left wing, a left bracket supported by the first left wing.

A pressure reducer for a self-contained breathing apparatus (SCBA) is provided. The pressure reducer includes a body including an outer surface. The pressure reducer further includes a valve unit configured to receive a breathable gas from a high-pressure tank at a tank pressure and to deliver the breathable gas at an outlet pressure lower than the tank pressure. The pressure reducer further includes a plurality of vent holes extending from the outer surface. The plurality of vent holes is configured to vent a gas from an interior of the body. The pressure reducer further includes a cover removably disposed on the outer surface and enclosing the plurality of vent holes. The cover includes a fluid passage disposed in fluid communication with the plurality of vent holes. The fluid passage is configured to receive the gas from the plurality of vent holes and discharge the gas externally of the cover.

A second stage regulator suitable for both right-handed and left-handed divers comprises a housing, a mouthpiece, a decompression mechanism, an exhaust mechanism and an airflow adjustment mechanism. The airflow adjustment mechanism can control the output air volume by adjusting the size of the vent. Even in the state of small air volume, the diver only needs to inhale a little to push the second stage output and inhale the air smoothly. The diver can control the direction of the airflow by operating the airflow adjustment mechanism to avoid being choked by the air when the air volume is large. The exhaust holes of the exhaust mechanism is arranged on the side and the exhaust mechanism is facing the left rear side of the housing, which can prevent the exhaust valve from being compressed due to the pressure of water flow when the diver is swimming.

A first stage pressure regulator is provided. A valve body has an inlet and an outlet that define a pressure chamber therebetween. The valve body defines a pressure compensation chamber having an opening fluidly communicating the pressure compensation chamber with the surrounding water. The first stage pressure regulator comprises an inlet tubular union removably received into the inlet. A removable high pressure orifice body defines an orifice therethrough. The orifice body is carried by the valve body proximate the inlet. A valve seat is within the valve body.

A pressure regulator assembly for an SCBA includes a valve assembly having a piston, a cylinder for receiving the piston, a sealing member for engagement by the piston, a conduit extending through the piston and facilitating fluid communication between an inlet chamber and a cavity of the cylinder, and a driving assembly for facilitating the engagement and disengagement of the piston responsive to a change of pressure in the outlet chamber. A bypass assembly for an SCBA is also disclosed.

A scrubber-heating apparatus for a diving rebreather includes an oxygen supplying element. The oxygen supplying element has a gas mixing portion connected thereto. The gas mixing portion has a breath connecting element connected thereto. The breath connecting element has a scrubber connected thereto. The scrubber is provided with an absorbent heating element and a temperature detecting component. The temperature detecting component has a state display connected thereto. The absorbent heating element and the state display are electrically connected to a power supplying portion. Thereby, the scrubber can recycle gas exhaled by a user to prolong the duration of use of the rebreather. Additionally, the absorbent heating element increases the temperature in the scrubber, thereby enhancing the adsorption efficiency and prolonging the overall duration of use.

A scrubber-heating apparatus for a diving rebreather includes an oxygen supplying element. The oxygen supplying element has a gas mixing portion connected thereto. The gas mixing portion has a breath connecting element connected thereto. The breath connecting element has a scrubber connected thereto. The scrubber is provided with an absorbent heating element and a temperature detecting component. The temperature detecting component has a state display connected thereto. The absorbent heating element and the state display are electrically connected to a power supplying portion. Thereby, the scrubber can recycle gas exhaled by a user to prolong the duration of use of the rebreather. Additionally, the absorbent heating element increases the temperature in the scrubber, thereby enhancing the adsorption efficiency and prolonging the overall duration of use.

Diving equipment includes a compressed air bottle connected to a breathing apparatus and an inflatable jacket via which buoyancy is balanced by the jacket being connected to the compressed air bottle to be inflated or to an outlet to be deflated. A monitoring device is activated via a control valve as a function of surrounding water pressure and has a time monitoring unit which, after the expiry of a defined time and in the absence of breathing activity in the breathing apparatus, changes to emergency operation and activates an emergency valve via a control line connecting the jacket to the compressed air bottle to force inflation of the jacket. Actuation of at least one regulating valve is influenced during a dive by the monitoring device and/or the control valve. In manual activation, the jacket is inflated via the inflation valve, and the compressed air is bled via the outlet valve.