Disclosed is an underwater booster, comprising a cabin body (5), a first mounting structure of thruster (1) and a second mounting structure of thruster (8) symmetrically disposed on two sides of the cabin body (5); a first connecting structure (2) and a second connecting structure (7) symmetrically disposed on the two sides of the cabin body (5), wherein the first mounting structure of thruster (1) is connected with the cabin body (5) via the first connecting structure (2), and second mounting structure of thruster (8) is connected with the cabin body (5) via the second connecting structure (7); a handle is disposed on the first connecting structure (2) and the second connecting structure (7) for gripping, and an axis of the first mounting structure of thruster (1) is not parallel to an axis of the second mounting structure of thruster (8). The structure can improve user experience.

Disclosed is an underwater booster, comprising a cabin body (5), a first mounting structure of thruster (1) and a second mounting structure of thruster (8) symmetrically disposed on two sides of the cabin body (5); a first connecting structure (2) and a second connecting structure (7) symmetrically disposed on the two sides of the cabin body (5), wherein the first mounting structure of thruster (1) is connected with the cabin body (5) via the first connecting structure (2), and second mounting structure of thruster (8) is connected with the cabin body (5) via the second connecting structure (7); a handle is disposed on the first connecting structure (2) and the second connecting structure (7) for gripping, and an axis of the first mounting structure of thruster (1) is not parallel to an axis of the second mounting structure of thruster (8). The structure can improve user experience.

Therapy gas delivery systems that provide run-time-to-empty information to a user of the system and methods for administering therapeutic gas to a patient. The therapeutic gas delivery system may include a gas pressure sensor attachable to a therapeutic gas source that communicates therapeutic gas pressure data to a therapeutic gas delivery system controller, a gas temperature sensor positioned to measure gas temperature in the therapeutic gas source that communicates therapeutic gas temperature data to the therapeutic gas delivery system controller, at least one flow controller that communicates therapeutic gas flow rate data to the therapeutic gas delivery system controller, at least one flow sensor that communicates flow rate data to the therapeutic gas delivery system controller, and at least one display that communicates run-time-to-empty to a user of the therapeutic gas delivery system. The therapeutic gas delivery system controller of the system includes a processor that executes an algorithm to calculate the run-time-to-empty from the data received from the gas pressure sensor, temperature sensor, flow controller and flow sensor, and directs the result to the display.

Therapy gas delivery systems that provide run-time-to-empty information to a user of the system and methods for administering therapeutic gas to a patient. The therapeutic gas delivery system may include a gas pressure sensor attachable to a therapeutic gas source that communicates therapeutic gas pressure data to a therapeutic gas delivery system controller, a gas temperature sensor positioned to measure gas temperature in the therapeutic gas source that communicates therapeutic gas temperature data to the therapeutic gas delivery system controller, at least one flow controller that communicates therapeutic gas flow rate data to the therapeutic gas delivery system controller, at least one flow sensor that communicates flow rate data to the therapeutic gas delivery system controller, and at least one display that communicates run-time-to-empty to a user of the therapeutic gas delivery system. The therapeutic gas delivery system controller of the system includes a processor that executes an algorithm to calculate the run-time-to-empty from the data received from the gas pressure sensor, temperature sensor, flow controller and flow sensor, and directs the result to the display.

A backrest for a scuba diver comprising a shaped plate supporting at least one air cylinder, at least a first strap comprising an upper right portion configured to fit around the scuba diver's right shoulder, an upper left portion configured to fit around the scuba diver's left shoulder and a lower portion configured to fit around the scuba diver's abdomen, wherein the shaped plate has a first right slide-through element and a first left slide-through element adapted to connect the upper right portion and the upper left portion, respectively, to the lower portion of the first strap, at least one weight pocket constrained to the lower portion of the first strap, wherein there is provided an anti-torsion means connecting the at least one weight pocket to the shaped plate and configured to oppose the torsion of the first strap in proximity to at least one of the first slide-through elements.

A backrest for a scuba diver comprising a shaped plate supporting at least one air cylinder, at least a first strap comprising an upper right portion configured to fit around the scuba diver's right shoulder, an upper left portion configured to fit around the scuba diver's left shoulder and a lower portion configured to fit around the scuba diver's abdomen, wherein the shaped plate has a first right slide-through element and a first left slide-through element adapted to connect the upper right portion and the upper left portion, respectively, to the lower portion of the first strap, at least one weight pocket constrained to the lower portion of the first strap, wherein there is provided an anti-torsion means connecting the at least one weight pocket to the shaped plate and configured to oppose the torsion of the first strap in proximity to at least one of the first slide-through elements.

A backrest for a scuba diver comprising: a strap , having an upper right portion fitting around the diver’s right shoulder, an upper left portion fitting around the diver’s left shoulder and a lower portion fitting around the diver’s abdomen, a right adjustment block between the upper right portion and the lower portion, and a left adjustment block between the upper left portion and the lower portion., Each of the adjustment blocks has a first pin engaged in a first loop of one end of the upper portion, a second pin engaged in a second loop of one end of the lower portion, a clamp clamping the lower portion of the strap to block the sliding of the end of the lower portion of the strap around the second pin, and a handgrip actuating the clamp between blocking and unblocking the sliding of the end of the lower portion of the strap around the second pin.

A backrest for a scuba diver comprising: a strap , having an upper right portion fitting around the diver’s right shoulder, an upper left portion fitting around the diver’s left shoulder and a lower portion fitting around the diver’s abdomen, a right adjustment block between the upper right portion and the lower portion, and a left adjustment block between the upper left portion and the lower portion., Each of the adjustment blocks has a first pin engaged in a first loop of one end of the upper portion, a second pin engaged in a second loop of one end of the lower portion, a clamp clamping the lower portion of the strap to block the sliding of the end of the lower portion of the strap around the second pin, and a handgrip actuating the clamp between blocking and unblocking the sliding of the end of the lower portion of the strap around the second pin.

A buoyancy control device for scuba diving comprising at least two shoulder straps, each shoulder strap having an upper portion and a lower portion joined by a closing buckle comprising a male buckle element and a female buckle element, which has a first connection means for connecting to the upper portion of the shoulder strap and a second connection means for connecting to the male buckle element, wherein the female buckle element comprises a first part that has the first connection means, a second part that has the second connection means, and an articulated connection pin for connecting the first part to the second part.

A buoyancy control device for scuba diving comprising at least two shoulder straps, each shoulder strap having an upper portion and a lower portion joined by a closing buckle comprising a male buckle element and a female buckle element, which has a first connection means for connecting to the upper portion of the shoulder strap and a second connection means for connecting to the male buckle element, wherein the female buckle element comprises a first part that has the first connection means, a second part that has the second connection means, and an articulated connection pin for connecting the first part to the second part.