Abstract: An arrangement for a breathing apparatus, the arrangement comprising a breathing device; a primary connection point; a secondary connection point; a primary side; a secondary side; a first valve arranged between the primary connection point and the secondary connection point, the first valve being arranged to automatically close a first fluid connection between the primary connection point and the secondary connection point when a secondary pressure in the secondary side decreases below a first pressure threshold; and a second valve arranged on the secondary side, the second valve being arranged to automatically establish a second fluid connection between the secondary connection point and the breathing device when a primary pressure in the primary side decreases below a second pressure threshold. A breathing apparatus is also provided.

Abstract: A harness for a breathing apparatus includes an interface member (6) having an elongated shape and being configured for receiving a container of breathable gas of the breathing apparatus. A hip belt (2) is connected to the interface member at a first region (50) of the interface member. A first shoulder belt (16) and a second shoulder belt (18) are connected to the interface member at the first region and at a second region (52) of the interface member. The hip belt and/or the first and second shoulder belts comprise at least one first molded heat resistant plastic material.

Abstract: A full breathing mask including an inner face mask and an outer face mask. The outer face mask includes a basin-shaped intermediate wall which extends from the inside of the outer face mask and which has a free end, a con-cave side, which is intended to embrace and lie in abutment with the wearer's chin part, and a convex side. At least substantially the entire perimeter of the inner face mask is adapted to lie against the wearer's face.

Abstract: The invention concerns a system and a method for supplying breathing gas to a diver. The system is of the open circuit type and comprises a gas source consisting of a pressurized container (1), which is intended to be placed at a distance from the diver and which delivers breathing gas under a high pressure, a breathing apparatus (4) which is intended to be carried by the diver and a flexible tube (3), which connects the gas source with the breathing apparatus. The flexible tube is of the high-pressure type, the gas is conducted through the flexible tube under a pressure, which is essentially equal to the pressure delivered from the gas source, and the gas source is arranged to be able to deliver breathing gas at a pressure, which exceeds approx. 30 bars.

Abstract: A full breathing mask including an inner face mask and an outer face mask. The outer face mask includes a basin-shaped intermediate wall which extends from the inside of the outer face mask and which has a free end, a con-cave side, which is intended to embrace and lie in abutment with the wearer's chin part, and a convex side. At least substantially the entire perimeter of the inner face mask is adapted to lie against the wearer's face.

Abstract: Means are provided for connecting at least one breathing gas cylinder to a face mask or like device in breathing equipment of the kind used by firemen and divers, for instance. The means includes a three-way coupling (5) in which at least one of the connections is comprised of a hose connector (10) which can be adjusted angularly in relation to the two remaining connections (9, 13). The coupling means can be used for different purposes and is relatively insensitive to external influences.

Abstract: A harness for holding and supporting at least one gas pressure-container. The harness includes a backplate, a container holder mounted on a first side of the backplate, and two elongated support straps disposed on respective sides of a symmetry line dividing the backplate into a left and a right part. A first end of the respective elongated support straps is attached to an upper part of the backplate. The harness further includes a waist belt fastened to a lower part of the backplate. Mounted on a lower part of a second side of the backplate is a first element which is at least substantially rigid and parallel with the backplate, and which is pivotably mounted on the backplate at a pivot point. Each of second ends of the elongated support straps is attached to the first element on a respective side of the pivot point.

Abstract: A pressure reducing and filling valve combination for use in conjunction with gas bottles, particularly gas bottles that contain breathing gas under high pressure for use by underwater divers, firemen, etc. The valve includes a valve chamber and a spring-loaded valve slide movable in the valve chamber for reducing the pressure with the aid of the spring when gas is taken from the bottle for delivery to a part of the chamber. The pressure in this chamber part is held substantially constant at a level determined by the spring force. An external multi-purpose valve connector is adapted to connect the valve chamber to external equipment when gas is consumed. When filling the bottle with gas under high pressure, the valve delivers gas to the bottle via the same passageway as that through which gas was delivered to the valve chamber in response to gas consumption.

Abstract: Breathing equipment including a breathing hood to surround a wearer's head. An inner mask covers at least the wearer's mouth and nose. The equipment includes a breathing gas delivery conduit and structure to permit gas to pass from the hood to the mask. A check valve allows gas to pass from the mask to the surroundings when overpressure in the mask has reached a given value. The breathing gas is delivered to the hood and the gas passing structure permits gas to pass in both directions between the hood and the mask. The gas passing structure requires a lower overpressure in the mask for passage of gas from the mask to the hood than the pressure required for the check valve to release gas to the surroundings.

Abstract: A method of verifying and indicating proper or improper functioning of breathing apparatus for an irrespirable environment. The breathing apparatus includes gas supply for supplying a user with breathable gas, at least one electrical component, a processor connected to the at least one electrical component, and at least one status indicator connected to the processor. A test signal is generated with the processor. The test signal is sent to the at least one electronic component of the breathing apparatus. A response to the test signal is generated with the at least one electrical component of the breathing apparatus. The response is transmitted to the processor. The response is compared to a predetermined response corresponding to proper functioning of the at least one electronic component of the breathing apparatus with the processor to determine a status of the at least one electrical component of the breathing apparatus.

Abstract: A carrying holder for a gas cylinder in a respirator is provided with a device for attachment and detachment of the cylinder in the carrying holder. The device includes a recess provided on the carrying holder, and is adapted to receive a support plate provided on the valve of the gas cylinder, and also a locking latch which, in the locking position, grips a support surface on the valve. The locking latch rotates around a shaft and is activated by a spring to assume the locked position.

Abstract: A rescue type breathing apparatus which includes a hood and a face mask incorporated inside the hood. During a first phase of the inhalation cycle a breathing gas is supplied to the face mask from the gas container through a bladder. After the bladder has been emptied breathing gas in a second phase of the inhalation cycle is supplied from the hood and the gas container.

Abstract: A pressure regulator has a first and a second chamber which are separated by a movable piston varying the size of the chambers and which are in fluid contact with one another through a channel extending in the movable piston. The piston has a greater pressure surface area in the first chamber than in the second chamber. A high-pressure chamber beneath the bottom of the second chamber, has an aperture disposed in the bottom of the second chamber. A valve seat is disposed in the second chamber and cooperates with the movable piston to form a throttle between the high-pressure chamber and the second chamber. A high-pressure piston disposed in the high-pressure chamber projects into the second chamber through the first aperture and is displaceable in its longitudinal direction therethrough. A second aperture is provided at the end of the high-pressure piston which faces the second chamber. Also, a channel in the high-pressure piston extends from the second aperture throughout the entire high-pressure piston.