1
Ernst Gunther Kolbe, Norbert Kollenbrandt, Hasso Weinmann, Wolfgang Drews, Karsten Vogeler, Hans Burkhardt Fiedler: Closed-cycle breathing equipment. Dragerwerk Aktiengessellschaft, McGlew & Tuttle, August 13, 1991: US05038772 (86 worldwide citation)

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 expirato ...


2
Ernst G Kolbe, Rainer Ernst, Hans Burkhardt Fiedler: Chemical oxygen generator. Dragerwerk Aktiengesellschaft, Walter Ottesen, January 1, 1991: US04981655 (15 worldwide citation)

A chemical oxygen generator has a chemical mixture based on an alkali-metal chlorate (NaClO.sub.3) which constitutes the charge of a cartridge having an ignition device and an oxygen outlet. This oxygen generator is improved so that the charge is insensitive to shock and so that it can be configured ...