Siemens Elema Ab

Carl-Erik Arvidsson

Lars Wallen

G&ouml;ran Skog

Lars Wall&eacute;n

An arrangement to provide a moisture barrier and bacteria barrier for various medical components that is connected to a measuring tube, arranged in the flow paths of a respirator is simple and inexpensive and exchangeable and does not cause a flow resistance in the flow paths of the respirator. A carrier carries at least two moisture barriers and bacteria barriers such that one barrier, given a carrier introduced in the respirator, is arranged exactly in front of each component.

Moisture barrier and bacteria barrier for medical components

A valve for regulating the flow of a medium has a valve housing with an inlet for the medium that is to be regulated, and an outlet for a regulated medium flow, a valve face with a valve opening, a movable sealing part that is arranged so that it is influenced by the medium flow in the direction of opening of the valve, and which closes and opens the valve opening as well as regulating the flow of medium through the valve opening. The valve further has an arrangement for controlling the position of the sealing part. In order to obtain a valve of this type in which a gas flow can be regulated with a high degree of precision, and can seal hermetically in a closed position using simple and inexpensive structure, a duct for the flow of the medium is arranged between the inlet and the side of the movable sealing part facing away from the valve face.

Membrane valve wherein the membrane is displaced by a combination of

A device for measuring a gas flow, has a measurement chamber and an ultrasonic transceiver unit which can be attached to the measurement (chamber over openings of the measurement chamber and which is provided with transmit and receive heads. The heads are directed against the openings of the measurement chamber, membranes being arranged between the measurement chamber and the transmit and receive heads which are permeable to ultrasound waves but largely impermeable to moisture and bacteria. In order to feed maximum acoustical energy to the ultrasonic transceiver unit while keeping moisture and bacteria away from the unit, the membranes are replaceably arranged close to the transmit and receive heads.

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Solna, Sweden

Carl-Erik Arvidsson