Drãgerwerk Ag & Co, Kgaa

Helena Kaszás

Tobias Otte

Oliver Wallnewitz

Ralph-Peter Jacobi

Krisztina Soltész

Philipp Schütze

A flow tube () has a housing () including at least a first housing half () and a second housing half (). Each housing half () has a connection surface () intended for combination with the other housing half (). The connection surfaces () enclose a mounting gap () for an orifice element (). Outside of the mounting gap () the connection surfaces () butt against each other in some sections by respective abutting surface portions (), and outside of the mounting gap () and outside of the abutting surface portions () the housing halves () are integrally combined with each other. A method is provided for producing the flow tube, namely for integrally joining the housing halves ().

Flow tube for a flow sensor and process for manufacturing a flow tube

A breathing mask has a mask body surrounding a cavity that is open towards one side and is intended for coming into contact with a human face around the mouth and/or nose. A valve arrangement is provided in the mask body with an inspiration valve, for controlling the flow of gas from a port for a breathing gas feed device for providing a breathing gas into the cavity, and an exhalation valve for controlling the flow of gas from the cavity into the surrounding atmosphere. An emergency breathing valve, controlling gas flow from the atmosphere surrounding the breathing mask into the cavity, has a pressure threshold, to allow gas flow, that is lower than an inhalation valve pressure threshold. The pressure thresholds at which the respective inhalation valve and the emergency breathing valve open are coordinated by the closing element being designed as a separate component of the valve arrangement.

Growing community of inventors

Gross Grönau, Germany

Helena Kaszás