Abstract: A breathing half mask (1) for protection against particles, aerosols and odors, having two or more mask sections (10). The breathing half mask (1) can be brought from a storage state into a use state by at least one folding process.

Abstract: A directional valve includes a fixing lug (13), which is arranged eccentrically to a valve membrane (16) and is arranged at a valve housing (15). The dimensions of the fixing lug (13) are selected for fixing the valve membrane (16) relative to the sealing surface (2) of valve seat (1). The size of the eccentric offset (x) is in a range between 8% and 15% of the axis length (D) of the greatest longitudinal extension of valve membrane (16).

Abstract: A directional valve for a respirator product includes a valve housing (15) and a valve seat (1) for receiving a flexible valve membrane (16). The valve seat has a circular and essentially flat sealing surface (2) surrounding an opening (3), which is sealingly covered by the valve membrane during an inspiration phase. A fixing lug (13), on the valve housing (15), fixes the valve membrane in the valve seat and is arranged offset in relation to the center of the valve membrane, such that an entire circumferential surface of the valve membrane is lifted off from the sealing surface during an expiration phase. The fixing lug is directed essentially at right angles to a flow plane formed by the opening. A counter-support (25), within the opening, is arranged opposite the fixing lug such that the valve membrane is mounted with fixed clamping action, between the fixing lug and the counter-support.

Abstract: A directional valve for a respirator product includes a valve housing (15) and a valve seat (1) for receiving a flexible valve membrane (16). The valve seat has a circular and essentially flat sealing surface (2) surrounding an opening (3), which is sealingly covered by the valve membrane during an inspiration phase. A fixing lug (13), on the valve housing (15), fixes the valve membrane in the valve seat and is arranged offset in relation to the center of the valve membrane, such that an entire circumferential surface of the valve membrane is lifted off from the sealing surface during an expiration phase. The fixing lug is directed essentially at right angles to a flow plane formed by the opening. A counter-support (25), within the opening, is arranged opposite the fixing lug such that the valve membrane is mounted with fixed clamping action, between the fixing lug and the counter-support.

Abstract: A directional valve includes a fixing lug (13), which is arranged eccentrically to a valve membrane (16) and is arranged at a valve housing (15). The dimensions of the fixing lug (13) are selected for fixing the valve membrane (16) relative to the sealing surface (2) of valve seat (1). The size of the eccentric offset (x) is in a range between 8% and 15% of the axis length (D) of the greatest longitudinal extension of valve membrane (16).

Abstract: A device for the selective determination of the quantity of oil mist includes an impactor (1) with a micronozzle (4) for dispensing a predetermined volume of a gas to be tested, a baffle plate (5) arranged downstream of the micronozzle (4) for depositing oil particles. A window (7) is provided on the side of the baffle plate (5) facing away from the micronozzle (4).

Abstract: A device for the selective determination of the quantity of oil mist includes an impactor (1) with a micronozzle (4) for dispensing a predetermined volume of a gas to be tested, a baffle plate (5) arranged downstream of the micronozzle (4) for depositing oil particles. A window (7) is provided on the side of the baffle plate (5) facing away from the micronozzle (4).

Abstract: A chemical oxygen generator with a chemical mass, which is accommodated inside a container, generates oxygen by a chemical reaction, and is held in the container by a gas-permeable fibrous material. The fibrous material is arranged around the chemical mass. The fibrous material is designed as a chemical sorption filter.

Abstract: A device for generating oxygen by the thermal decomposition of a chemical contained in a cartridge housing, whose reaction takes place, beginning from an activation point, along a reaction front propagating in the interior of the cartridge housing in the direction of an unspent chemical, with a feed line with a restrictor, which feed line originates from the cartridge housing from the area of the unspent chemical in front of the reaction front, for drawing off the oxygen generated, shall be improved in terms of a more uniform release of the oxygen generated. To accomplish this task, a compensating line, which opens into the interior of the cartridge housing in the area of the spent chemical behind the reaction front, is connected to the cartridge housing.