Abstract: The invention concerns a double-chamber device for mixing at least two viscous substances, comprising: cylindrical and coaxial first and second communicating vessels, each hermetically sealed at one end by a mobile piston, and provided at its second end with a slightly conical bottom end, the two vessels being arranged, preferably vertically, in mirror symmetry relative to a meridian plane perpendicular to their common axis; a central mixing element connecting the two vessels at the two slightly conical bottom ends; and a high pressure hydraulic device for automatically activating the pistons in a coordinated reciprocating movement. A worm screw injection device in communication with one of the vessels or with the mixing element may be used to inject the substances. Mixing of substances may include driving the pistons in a coordinated reciprocal motion to collapse one vessel while expanding the other, forcing the substances through the central mixing element.

Abstract: The invention concerns a double-chamber device for mixing at least two viscous substances, comprising: cylindrical and coaxial first and second communicating vessels, each hermetically sealed at one end by a mobile piston, and provided at its second end with a slightly conical bottom end, the two vessels being arranged, preferably vertically, in mirror symmetry relative to a meridian plane perpendicular to their common axis; a central mixing element connecting the two vessels at the two slightly conical bottom ends; and a high pressure hydraulic device for automatically activating the pistons in a coordinated reciprocating movement.

Abstract: A method for entering into an air lock between an outer volume and an aseptic, pharmaceutical-quality enclosed space, wherein an operator dons a diving-type suit supplied with breathable air, the operator enters the air lock, the suit is disinfected in the air lock by projecting a pulverized sterile disinfectant liquid onto said suit and the disinfectant liquid, which is drained off from the suit and the inner partition walls of the suit during and after disinfecting, is eliminated from the air lock, and turbulent sterile ambient-temperature air currents are blown onto said suit, and the air, which is charged with disinfectant and possibly moisture, is evacuated from the air lock until the suit and the inner partition walls of the air lock are changed, then the operator enters the aseptic space.