Abstract: A valve for a packaging container is proposed, wherein the valve comprises at least one base film (10) with an opening (11), at least one frame film (13) encompassing a free region (17), and at least one membrane (12) which is arranged on the base film (10) and covers the opening (11), wherein a fluid is provided between the membrane (12) and the base film (10), wherein the membrane (12) is connected to a surrounding film (20) via at least one connection region (22), the surrounding film (20) being connected on one side to the base film (10) and on its other side to the frame film (13) and the membrane (12) being arranged movably within the free region (17), wherein the surrounding film (20) is open at least in one point, such that a channel (18) is formed.

Abstract: The invention comprises a shell-like upper housing part and a shell-like lower housing part. The two-part housing is formed such that it can be sealed tightly against any external environmental influences (gases, vapors, moisture, liquids, dust, chemicals and bacteria) without any ventilation to dissipate the heat developed in the housing. The two-part housing is formed completely without any rim on the outside and has a continuously smooth, joint-free surface, which is designed such that it can be sealed with a coating in the nanometre range that repels contamination and bacteria.

Abstract: The invention relates to a transmission with torque division for a helicopter rotor drive. In a manner known per se, in the transmission a first power transmission branch has a first rotatable driving pinion (6) which is in constant engagement with a first toothed wheel (2) on the output side. At least one other power transmission branch has one other driving pinion (9) co-axial to the first driving pinion (6) and in constant engagement with one other toothed wheel (4) on the output side co-axial to the first toothed wheel (2) on the output side. One torsionally elastic member is arranged in the torque flow of each power transmission branch. The torsion-resistance of the torsionally elastic members determines the load proportions of the power transmission branches. The inventive transmission makes possible a high power density with small installation space, light weight and a small number of functional elements.