4 results about "Limiting oxygen concentration" patented technology

A method of additive manufacture is disclosed. The method may include restricting, by an enclosure, an exchange of gaseous matter between an interior of the enclosure and an exterior of the enclosure. The method may further include running multiple machines within the enclosure. Each of the machines may execute its own process of additive manufacture. While the machines are running, a gas management system may maintain gaseous oxygen within the enclosure at or below a limiting oxygen concentration for the interior.

A method of additive manufacture is disclosed. The method may include restricting, by an enclosure, an exchange of gaseous matter between an interior of the enclosure and an exterior of the enclosure. The method may further include running multiple machines within the enclosure. Each of the machines may execute its own process of additive manufacture. While the machines are running, a gas management system may maintain gaseous oxygen within the enclosure at or below a limiting oxygen concentration for the interior.

Provided is a method for oxidizing metal powder that easily controls oxidation of the metal powder. A method for oxidizing metal powder (M) housed in a container (3), wherein: the container (3) is placed in an atmosphere of an inactive gas at a first pressure higher than atmospheric pressure; and a mixed gas containing an inactive gas and oxygen is introduced into the container (3) in such a manner that the oxygen concentration in the container (3) is lower than the limit oxygen concentration of the metal powder (M), and the pressure in the container (3) is raised to a second pressure higher than the first pressure.

A device (10) for generating hydrogen from water using electrical current, comprising a plurality of electrolysis devices (11), each electrolysis device (11) having at least one water supply connection (13), at least one water discharge connection (14), and at least one hydrogen discharge connection (15), each electrolysis device (11) being connected via its at least one water supply connection (13) to a supply line (16) for water, via its at least one water discharge connection (15) to a discharge line (17) for water and oxygen, and via its at least one hydrogen discharge connection (15) to a discharge line (18) for hydrogen, comprising a housing or frame (19) in which the electrolysis devices (11) are arranged, and comprising an inert gas generating device (20) configured to generate inert gas in situ in the device (10), the inert gas generating device (20) being configured,using hydrogen to reduce the oxygen content in air to such an extent that the air serves as an inert gas and has an oxygen content that is lower than a limiting oxygen concentration of hydrogen, wherein each electrolysis device (11) and / or the hydrogen discharge line (18) and / or a device (22) arranged in the hydrogen discharge line (18) for processing the hydrogen and / or the water and oxygen discharge line (17) and / or a device (23) arranged in the water and oxygen discharge line for removing oxygen from the discharged water and / or the housing or frame (19) can be purged with inert gas generated by the inert gas generating device (20).