Dräger Safety Ag&co. Kgaa

Mohamed Houssem Harbi

Jasser Rahmatyan

Jürgen Unger

Steffen Pracht

Marcus Romba

Jan Musow

Hermann Hopermann

A safety helmet with a helmet shell, with a bearing ring, with a rotatable actuating element () and with a transmission unit (). The transmission unit () transmits a rotation of the actuating element to the bearing ring, so that the head size provided is changed. A helmet shell-side transmission piece () is non-rotatably connected to the actuating element () such that they rotate in unison, and a bearing ring-side transmission piece () is connected mechanically to the bearing ring. The helmet shell-side transmission piece () can move both relative to the actuating element () and relative to the bearing ring-side transmission piece () linearly in two opposite directions. The distance between the actuating element () and the bearing ring can be changed thereby.

Safety helmet with telescopically adjustable head size

A connection module () for installation in a closed breathing circuit of a closed-circuit breathing apparatus (), includes an inlet port (), for connection to a first closed circuit element, an outlet port (), for connection to a second closed circuit element, a maintenance fluid inlet (), and a maintenance fluid outlet (). A maintenance device may be provided with the connection module and a controller () and control module regulated valves (). Maintenance fluid is circulated through the closed breathing circuit by the controller and valves in a state in which the connection module () is installed in the closed-circuit breathing apparatus. A method for maintaining a closed-circuit breathing apparatus includes opening the closed-circuit breathing apparatus at a point, installing the connection module or the maintenance device, and introducing maintenance fluid into the closed breathing circuit of the closed-circuit breathing apparatus through the connection module or the maintenance device.

Connection module, maintenance device and method for maintaining a closed-circuit breathing apparatus

Growing community of inventors

Stockelsdorf, Germany

Mohamed Houssem Harbi