A respirator mask for automatically activating an air-saver switch within a regulator by rotation of the regular as the regulator is mounted and dismounted from a facepiece of the mask. The mask includes a facepiece including a regulator engagement region having an aperture and a protrusion proximate the aperture, and a regulator including a regulator body having a facepiece engagement region matably engageable with the regulator engagement region, a fluid flow path within the regulator body, and a latch within the regulator body, the latch causing obstruction of the fluid flow path when actuated. The latch is engageable with the protrusion, the regulator being rotatable within the facepiece aperture between a first rotational position and a second rotational position, rotation of the regulator within the facepiece aperture from the second to the first rotational position engaging and actuating the latch to obstruct the fluid flow path.

A device for regulating breathing gas delivered to a user, comprising a gas circuit comprising a main line having at least an upstream end intended to be connected to at least one gas source and a downstream end intended to be connected to at least one user station such as a mask, the main line comprising at least one electromechanical control valve configured to regulate the gas pressure between the upstream and the downstream, the circuit comprising a secondary line comprising an upstream end intended to be connected to at least one gas source and a downstream end intended to be connected to the same user station(s), the secondary line comprising at least one auxiliary member for regulating the gas flow, the device comprising a switching system configured to control the flow of gas between the upstream and the downstream of the circuit via the main line or via the secondary line, characterized in that the auxiliary member for regulating the secondary line is a pneumatic pressure regulator.

There is disclosed breathing apparatus equipment which may be in the form of a waist mountable manifold. The breathing apparatus equipment comprises a manifold having a manifold inlet port for a source of breathable gas and at least one manifold outlet port for delivering breathable gas to a user. The equipment further comprises a strap arranged to be worn by the user, and a holder coupled to the strap and having a socket. The socket is configured such that the manifold can be removably located within the socket in multiple orientations.

There is provided a back carrier that does not hinder the movement of a wearer. A back carrier having a gas cylinder attached thereto, and carried on wearer's back, the back carrier including: a main body to which the gas cylinder is attached; and an adjuster including a regulator and a pressure demand valve attached to the main body and integrated with each other.

A personal breathing apparatus includes a housing having an exhaust port, at least one filter-port, and a mouth-port connecting to a mouthpiece which is held inside the user's mouth while worn. A mouthguard on the mouthpiece is claspable by the user's teeth. By design, the personal breathing apparatus is balancable at the mouthpiece, such that the portion of the apparatus outside of the user's mouth is no heavier than the portion inside the user's mouth. In this way, the apparatus can be retained only by the clenching action of the user's teeth for long periods of time with no duress to the user. No head strap or other retention fastener is required.

Disclosed is a chemical oxygen self-rescue device, comprising a breathing assembly (1), an oxygen generating assembly (2) and a gas bag (3) sequentially communicated with each other, wherein the oxygen generating assembly comprises an oxygen generating agent tank (21), a gas discharge valve (23) and an oxygen candle (22); the gas discharge valve is arranged on a component above an oxygen generating agent (213) in the oxygen generating agent tank and below a breathing end of the breathing assembly, and the opening and closing of the gas discharge valve are controlled by means of an inflated volume of the gas bag; and a heat radiation assembly and the oxygen generating agent are provided in the oxygen generating agent tank, the heat radiation assembly comprises a vent pipe (211) and a heat radiation frame (212), the vent pipe communicates the breathing assembly with the oxygen generating agent tank, the heat radiation frame is provided in the oxygen generating agent tank, and the oxygen generating agent tank is divided, by the vent pipe and the heat radiation frame, into a plurality of accommodation spaces for the loading of the oxygen generating agent. The chemical oxygen self-rescue device reduces the resistance to breathing, lowers the temperature of breathed gas and improves the utilization rate of the oxygen generating agent.

A device for regulating breathing gas delivered to a user, comprising a gas circuit comprising a main line having at least an upstream end intended to be connected to at least one gas source and a downstream end intended to be connected to at least one user station such as a mask, the main line comprising at least one electromechanical control valve configured to regulate the gas pressure between the upstream and the downstream, the circuit comprising a secondary line comprising an upstream end intended to be connected to at least one gas source and a downstream end intended to be connected to the same user station(s), the secondary line comprising at least one auxiliary member for regulating the gas flow, the device comprising a switching system configured to control the flow of gas between the upstream and the downstream of the circuit via the main line or via the secondary line, characterized in that the auxiliary member for regulating the secondary line is a pneumatic pressure regulator.

A pressure reducing system for a breathing apparatus may include a conduit and a mouthpiece. The system may also include a valve poppet operatively interposed between the conduit and the mouthpiece, the valve poppet being movable between a closed position and an open position. The conduit may include an abutment against which the valve poppet abuts in the closed position and from which the valve poppet is distanced in the open position, and the abutment may define an annular interface which in the closed position is in contact with the valve poppet. The system may also include a balancing chamber that defines a pressure balancing zone. The valve poppet may define a passage that places the conduit and the pressure balancing chamber in fluid communication and a section of said passage, in the open positions extends in the supply conduit beyond said annular interface.

A coupling device for a breathing apparatus, characterized in that a connecting device is inseparably connected to the regulator hose, and can be coupled with at least two couplers, each having a flow check valve, for connection to a breathing gas source. Other aspects are described and claimed.

A respirator mask for automatically activating an air-saver switch within a regulator by rotation of the regular as the regulator is mounted and dismounted from a facepiece of the mask. The mask includes a facepiece including a regulator engagement region having an aperture and a protrusion proximate the aperture, and a regulator including a regulator body having a facepiece engagement region mateably engageable with the regulator engagement region, a fluid flow path within the regulator body, and a latch within the regulator body, the latch causing obstruction of the fluid flow path when actuated. The latch is engageable with the protrusion, the regulator being rotatable within the facepiece aperture between a first rotational position and a second rotational position, rotation of the regulator within the facepiece aperture from the second to the first rotational position engaging and actuating the latch to obstruct the fluid flow path.