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.

An apparatus is disclosed that includes an aircraft or repurposed aircraft or fuselage having a cabin capable of pressurization, a way to pressurize the cabin whether by built in machinery or external apparatus, a way to deliver oxygen to a plurality of persons in the cabin, a source of hyperbaric oxygen, a pressure gauge or regulator configured to measure or regulate a pressure of the hyperbaric oxygen or the aircraft, a plurality of face or head coverings configured to provide the hyperbaric oxygen to persons or patients in need thereof, and an optional exhaust system configured to remove gas(es) from the face or head coverings without releasing the gas(es) into the cabin. Each of the face or head coverings includes a gas inlet, a gas outlet, and one or more seals adapted to contain oxygen in the face or head covering at a pressure greater than 1 atm. A related kit and a related method of treating persons with hyperbaric oxygen are also disclosed.

An apparatus is disclosed that includes an aircraft or repurposed aircraft or fuselage having a cabin capable of pressurization, a way to pressurize the cabin whether by built in machinery or external apparatus, a way to deliver oxygen to a plurality of persons in the cabin, a source of hyperbaric oxygen, a pressure gauge or regulator configured to measure or regulate a pressure of the hyperbaric oxygen or the aircraft, a plurality of face or head coverings configured to provide the hyperbaric oxygen to persons or patients in need thereof, and an optional exhaust system configured to remove gas(es) from the face or head coverings without releasing the gas(es) into the cabin. Each of the face or head coverings includes a gas inlet, a gas outlet, and one or more seals adapted to contain oxygen in the face or head covering at a pressure greater than 1 atm. A related kit and a related method of treating persons with hyperbaric oxygen are also disclosed.

An adapter for selectively providing fluid to a device from one of multiple fluid sources has a body with a first inlet for connecting a first one of the multiple fluid sources to the device and a second inlet for connecting a second one of the multiple fluid sources to the device. The adapter also includes a handle that is movably coupled to the body and includes an access control element. The handle is configured to secure the body to a device when the adapter is in either of a first position or a second position that is rotated relative to the first configuration. The access control element obstructs access to the second inlet when the adapter is secured to the device in the first position and the access control element obstructs access to the first inlet when the adapter is secured to the device in the second position.

A diving and snorkeling mask structure including a full face mask, a frame, at least one lens, a joint, a respiratory tube and at least one securing belt is disclosed. The full face mask includes a first soft material region connected with a second soft material region. The frame is combined with the second soft material region of the full face mask. The at least one lens is disposed in the frame. The joint is disposed on the full face mask, and adjacent to the upper side of the frame. The respiratory tube is disposed on the joint, and establishes the air communication with the full face mask via the joint. The at least one securing belt includes a side buckle element to snap fit the full face mask.

A diving and snorkeling mask structure including a full face mask, a frame, at least one lens, a joint, a respiratory tube and at least one securing belt is disclosed. The full face mask includes a first soft material region connected with a second soft material region. The frame is combined with the second soft material region of the full face mask. The at least one lens is disposed in the frame. The joint is disposed on the full face mask, and adjacent to the upper side of the frame. The respiratory tube is disposed on the joint, and establishes the air communication with the full face mask via the joint. The at least one securing belt includes a side buckle element to snap fit the full face mask.

A breathing system includes a facepiece and a regulator to deliver breathing gas to the facepiece. The regulator includes a sensor system including at least one sensor responsive to respiration of a user. The breathing system further includes a processor system in operative connection with the at least one sensor, a memory system in operative connection with the processor system and at least one algorithm stored in the memory system and executable by the processor system. The at least one algorithm is adapted, configured or programmed to determine at least one of a rate of respiration and a respiration volume from data from the at least one sensor. The algorithm is further adapted, configured or programmed to relate at least one of the rate of respiration and the respiration volume to a physiological state of the user.

A breathing system includes a facepiece and a regulator to deliver breathing gas to the facepiece. The regulator includes a sensor system including at least one sensor responsive to respiration of a user. The breathing system further includes a processor system in operative connection with the at least one sensor, a memory system in operative connection with the processor system and at least one algorithm stored in the memory system and executable by the processor system. The at least one algorithm is adapted, configured or programmed to determine at least one of a rate of respiration and a respiration volume from data from the at least one sensor. The algorithm is further adapted, configured or programmed to relate at least one of the rate of respiration and the respiration volume to a physiological state of the user.

A high-pressure passthrough apparatus and protective suit having a high-pressure passthrough is provided. A high-pressure passthrough having a penetrator body is connected to a protective suit, wherein a first half of the penetrator body is positioned exterior of the protective suit and a second half of the penetrator body is positioned interior of the suit. A high-pressure passthrough valve is positioned on the second half of the penetrator body, wherein high-pressured air is supplied to an interior space of the protective suit. Releasing the quantity of high-pressure air to the interior of the protective suit with the high-pressure passthrough valve may act to cool the interior of the protective suit.

A discharger structure on earloop facemasks includes at least one opening hole on an earloop facemask covered by a cover. The cover is in a streamline shape and has a passage space for airflow. A check valve is disposed in the opening hole at an inner side of the cover, and the cover further has a discharging hole at an opposite side of the check valve, defining an area within the passage space between the check valve and the discharging hole for airflow. Thereby the check valve is closed by a diaphragm when air pressure within the facemask is negative, and the check valve is opened by the diaphragm when air pressure within the facemask is positive, so as to control airflow through the check valve.