Dragerwerk Aktiengesellschaft

Dragerwerk Aktiengessellschaft

Karsten Vogeler

Rainer Ernst

Udo Burchardt

Hans-Christoph Bechthold

Hasso Weinmann

Wolfgang Drews

Uwe Gerdts

Hans-Burkhardt Fiedler

Norbert Kollenbrandt

Ernst-Gunther Kolbe

The invention relates to a chemical oxygen generator having a chemical charge arranged within a housing. This chemical charge is brought to an exothermal oxygen-releasing reaction by an ignition device with the reaction running through the chemical charge in the form of a reaction front defining a surface and starting from the ignition-end wall of the housing. The oxygen generator has at least one reaction-control member arranged within the chemical charge. In one embodiment, the reaction-control member is disposed transversely to the direction of movement of the reaction front and overlaps a part of the surface of the reaction front. In another embodiment, the reaction-control member extends parallelly to the direction of movement of the reaction front. The oxygen generator of the invention is improved in that the oxygen flow and the duration of supply can be influenced beyond that obtained with a purely geometric extension of the reaction path. The improvement is obtained in that the reaction-control members are configured to have a thermally-insulating layer and at least one good thermally-conducting layer.

Chemical oxygen generator having a multi-component reaction-control

The invention relates to a chemical oxygen generator having a chemical charge arranged within a housing. This chemical charge is brought to an exothermal oxygen-releasing reaction by an ignition device with the reaction running through the chemical charge in the form of a reaction front defining a surface and starting from the ignition-end wall of the housing. The oxygen generator has at least one reaction-control member arranged within the chemical charge. A generator of this kind is improved in that the oxygen flow and the supply duration can be influenced by the material and/or the shape of the reaction-control member. The improvement is achieved in that one or more reaction-control members made of sheet metal are arranged parallel to the direction of movement of the reaction front. As an alternative, the reaction-control member can be configured in the form of a spiral conveyor which is made of sheet metal or a thermally-insulating material. Furthermore, the reaction-control member can be a spirally-wound band made of sheet metal or a thermally-insulating material and arranged in a can-shaped housing.

Chemical oxygen generator having a reaction-control member

A closed-cycle breathing equipment and gas mask for operation under pressure with a pressurized air source for respiratory air and with an air bag being under prestress during the inspiration phase includes an arrangement where the prestress is decreased by a control element recognizing the expiratory phase and so as to support respiration during the expiration phase. A pneumatic control valve is used which can switch connections between the inspiration and the expiration phase and which is directly controlled by the difference between the exhalation pressure and the pressure in the air bag. The control valve connects the pressurized air source with the air bag during the inspiration phase and during the expiration phase it interrupts the connection due to the occurring dynamic pressure of the pressurized air from the pressurized air source and thus actuates a pneumatic adjusting element so that the mechanical prestress at the air bag is reduced.

Closed-cycle breathing equipment

Growing community of inventors

Brunsbek, Germany

Karsten Vogeler