Abstract: A fastening device (3) for detachably fastening a medical instrument (2A-2E) to a holding structure (1) includes two crossbeams (4A, 4B), two longitudinal beams (5A, 5B) with a claw (6) for extending behind a holding surface (1A) of the holding structure. A guide (7-9) is provided, by which the crossbeams (4A, 4B) are moved in the direction of the claws (6) of the longitudinal beams during a motion of the longitudinal beams (5A, 5B) in relation to one another. A clamping structure (12) is provided for moving the longitudinal beams (5A, 5B) in relation to one another.

Abstract: A fastening device (3) for detachably fastening a medical instrument (2A-2E) to a holding structure (1) includes two crossbeams (4A, 4B), two longitudinal beams (5A, 5B) with a claw (6) for extending behind a holding surface (1A) of the holding structure. A guide (7-9) is provided, by which the crossbeams (4A, 4B) are moved in the direction of the claws (6) of the longitudinal beams during a motion of the longitudinal beams (5A, 5B) in relation to one another. A clamping structure (12) is provided for moving the longitudinal beams (5A, 5B) in relation to one another.

Abstract: A device with a valve for setting the flow of a flow medium, which has a passage channel with an inlet opening and with an outlet opening for the flow medium, and with a tongue-like valve element, which is arranged in the passage channel. The valve element is adjustable in a rotatably movable manner with an actuating device between two end positions. The device is adapted to users who need the flow medium at different pressure levels by providing a discharge opening branching off from the passage channel. The discharge opening is provided with a diaphragm opening having a predetermined gap geometry. The discharge opening with diaphragm opening is arranged in the range of pivoting of the valve element such that the discharge opening is closed in one of the end positions and the passage channel is switched essentially in the direction of flow at the same time.

Abstract: A gas flow control element with a gas-permeable section, through which excess gas flows to the outside from an interior space (10), is to be improved such that it can be cleaned with ease and that a defined, reproducible discharge is present. To accomplish this task, the gas-permeable section comprises individual disks (5) lying one on top of another, which are provided with flow channels.

Abstract: A pressure regulator or pressure element with a valve, whose valve closing body 10 separates an admission pressure chamber 2 from a back pressure chamber 3, has a diaphragm 12 that is under spring pressure in the opening direction of the valve closing body 10. The diaphragm 12 separates the back pressure chamber from a reference pressure chamber 4 which is filled with a gas that is under such pressure that its ability to expand compensates the temperature dependence of the compressive force of the spring in order to compensate the pressing force of the compression spring 13, which changes with changing temperature.