Siemens Aktiengesellschaft

Siemens Elema Ab

Sture Eriksson

Sven-Gunnar Olsson

Rolf Edstroem

Georgios Psaros

Bo Dahlstreom

A flow transducer muff for positioning a substantially right-angled parallelepiped-shaped flow transducer in the expiration channel of a ventilator includes a first muff half and a second muff half respectively connectable to opposite sides of the flow transducer, and a connecting link attaching the muff halves together and permitting the muff halves to be bent around the connecting link to fit against the flow transducer.

Flow transducer muff

A ventilator for supplying and emitting respiratory gas to and from the airways of a human or an animal patient has a multiple-function safety valve located between a 10 control valve and the airways. The safety valve is biased in its closing direction by two springs, which apply force that corresponds to a predetermined overpressure, and is biased in its opening direction by a spring loaded piston, which applies force that exceeds the force of the springs. When electrical power is supplied to the ventilator, an electromagnet is energized. The electromagnet pulls the piston against the force of its spring load, and the safety valve closes. By means of a control device, the pressure in an inspiration section of the ventilator can be monitored and the electromagnet is disconnected at a programmed overpressure. In the event of a power failure, the safety valve will open and air can pass through the open safety valve to the airways.

Ventilator

A knob assembly is disclosed for a control unit of a medical apparatus with a front panel. In order to transfer a turning setting movement through the front panel, a feed-through sleeve is rotatably arranged in the front panel and a knob core is movably arranged in the feed-through sleeve. On the control side of the front panel the feed-through sleeve and the knob core are enclosed by a manipulable element which, through application of pressure, can axially move the knob core in the feed-through sleeve. The knob core on the back side of the front panel moves a resilient locking washer from a locking position to an unlocked position so that turning of the manipulable element also will turn the feed-through sleeve. To improve the sealing at the feed-through location, the front panel is provided with a protection plate which is beaded outwards and surrounding the feed-through sleeve, with the manipulable element tightly enclosing the beaded protection.

Growing community of inventors

Vallentuna, Sweden

Sture Eriksson