Abstract: A device for delivering a breathing gas to an on-demand breathing mask (23) comprises—an Onboard Oxygen Generator (1) comprising an oxygen-rich gas outlet end; —compressor means (7) comprising inlet means (6) and outlet means (12), said inlet means being connected to oxygen-rich gas outlet end of said Onboard Oxygen Generator (1) for receiving said gas, said compressor means being operable to increase the pressure of said gas for delivery from said outlet means to the on-demand breathing mask. The device further comprises a connecting means (17) to connect said compressor outlet means (12) to said compressor inlet means (6) so that oxygen-rich gas in excess at the outlet means is redirected to the inlet means.

Abstract: Plasma generation system comprising a high voltage generator (20) connected to at least two electrodes (26, 28), one having a large radius of curvature, or having a plane geometry, and the other having a small radius of curvature, this high voltage generator being controlled (32, 34, 36) in such a way as to maintain constant the mean frequency of occurrence of the current discharges between the electrodes.

Abstract: A respirator is provided for the treatment, particularly in the home, of persons suffering from respiratory insufficiencies. The respirator comprises a reciprocating linear electric motor compressor having a gas intake orifice connected to atmosphere for example, a compressed gas discharge orifice connected to a respiratory mask, a piston, a spring acting on the piston, and an electromagnet for moving the piston against the action of the spring to supply compressed gas to the mask via the discharge orifice. A thyristor pulse generator is controlled by a clock to provide pulses to the electromagnet to define the insufflation time. The compressor operates only during the insufflation time.