Roche Diagnostics International Ag

Roche Diagnostics Operations, Inc.

Jean-Noël Fehr

Christopher D Wiegel

Rudolf Zihlmann

Heiner Kaufmann

Christoph Rickert

Sandro Niederhäuser

Eric Misselwitz

Stefan Troller

Thomas Von Büren

Marc Mattmüller

A medical infusion system with pulse width modulation and a safety circuit and a method thereof are disclosed. Embodiments of the system include a switching device and a pump motor, wherein the pump motor and the switching device are connected in series and constitute a power supply circuit to be connected to a power supply. Embodiments of the system further includes a control signal generator configured to generate a control signal e.g. PWM, and which is connected to input of the safety circuit. Output of the safety circuit is connected to a control input of the switching device such that the pump motor will not operate if there is no control signal applied to the input of the safety circuit.

Medical infusion system with pulse width modulation and safety circuit

A medical liquid transfer system includes a pump configured to transfer liquid between at least two containers. A detachable connector is detachably secured to the pump. The detachable connector has at least one pump passage to transmit pumping pressure from the pump to at least one of the containers. The detachable connector can include one or more liquid impermeable and gas permeable membranes to ensure the liquid is retained in the detachable connector. After the fluid is transferred the detachable connector is removed and replaced by a new one in order to prevent contamination of the pump. An interlock mechanism is used to prevent premature removal of the detachable connector and/or the container being filled.

Manual filling aid with push button fill

Growing community of inventors

Neuenburg, Switzerland

Jean-Noël Fehr