Dräger Safety Ag&co. Kgaa

Dirk Feil

Michael Rosert

Alexander Busch

Achim Volmer

Siegbert Tolk

Manfred Gdulla

Christoph Schmidt

Martin Weisgerber

Lothar Löw

Volker Nesch

Sandra Dankert

Arnd Kausch

Werner Lange

A breathing apparatus includes a compressed air source with a compressed air source valve, a breathing regulator with a pressure reducer and a demand valve, a breathing mask connected to the demand valve at a first inlet connector, a second air source, a switching mechanism having an actuating member for switching between the compressed air source and the second air source and an exhalation valve, on the breathing mask, movable between a higher internal pressure in a second operating state than in a first operating state. The actuating member is provided on the breathing regulator. The switching mechanism, upon being switching to compressed air breathing, activates the lung-governed demand valve and adjusts the exhalation valve to the second operating state. Upon switching to breathing via the second air source, the lung-governed demand valve is deactivated and the exhalation valve () is adjusted to the first operating state.

Respirator

A gas mask is provided with a mask body, which is designed to cover the face of a user, and with an opening in the mask body, which is closed by a speech diaphragm () in a gas-tight manner. A funnel () is directed toward the speech diaphragm with an opening angle in the range of 20&#xb0; to 90&#xb0;. The funnel () is arranged in front of the speech diaphragm in the interior space of the mask body in order to focus sound waves onto the speech diaphragm.

Gas mask

A gas mask with a connection piece () at a mask body has an adapter (), which is rotatably received in the connection piece (). The gas mask has an angle piece () outside the mask that connects to a drinking tube () for the consumption of food or beverage and has a mouthpiece within the mask to form a drinking device (). A swivel joint connection is provided between the adapter () and angle piece () to accomplish the object.

Gas mask with a drinking device

A gas mask is provided for normal-pressure and overpressure operation with at least one breathing port, an expiration valve with a valve spring, an adjusting element affecting the prestress of the valve spring and a pushing element having a first switching position and a second switching position. The pushing element is designed to act on the adjusting element during a translatory motion from the first switching position into the second switching position. A change in the prestress of the valve spring can be brought about and a switchover from a 'normal pressure' mode into an 'overpressure' mode can thus be carried out.

A filter for a breathing device is flexible and can be manufactured in a simple manner. The filter includes a flexible frame () with a filter port () and with an end piece (). The flexible frame () is provided between two filter mats (). The flexible frame () can be folded over along a bent edge () such that the filter port () and the second end piece () are arranged opposite each other.

Filter for a breathing device

The connection of a breathing mask to a safety helmet provides increased wearing comfort. A fastening mount () with circular arc-shaped inner contour () is provided, and the bracket for the breathing mask has a projection corresponding thereto. The projection is in contact with the inner contour () of the fastening mount (), so that the bracket is displaceable in relation to the fastening mount () in a rotatingly movable manner.

Safety helmet with a breathing mask

A carrying system for a respirator product shall be improved such that it shall have a simple design, make it possible to protect the cylinder valves and receive additional weights in a simple manner. To accomplish the object, a bracket () is provided, which has a U-shaped protective strap () in the area of the cylinder valves () and has a mount () for a balance weight (), which can be pushed in between the pressurized gas cylinders ().

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Lübeck, Germany

Dirk Feil