Medela Holding Ag

Adrian Honegger

Therese Naef

Britta Pukall

Hilmar Ehlert

Lukas Bannwart

Charles Giezendanner

Cornel Bächler

Martin Melzer

Thomas Imhof

The present invention relates to a motor-driven suction pump and a method for connecting such a pump. The suction pump has a pump unit for generating a negative pressure which is accommodated in a housing. Further, a terminal box is provided which can be connected to a power source via a connecting cable and has contact elements for supplying the pump unit with a power current. The contact elements are electrically conductively connected to the contact counter elements provided on the housing side and leading to the pump unit when the terminal box is coupled to the housing. In order to increase electrical safety, a sensor, an evaluation unit, and a switch are provided. The sensor is configured to check the coupling of the terminal box. The switch switches a power supply to at least one of the contact elements. The evaluation unit is data-based connected to the sensor and the switch such that the switch connects the contact element to the power current supply when a signal of the sensor confirming the coupling is present and disconnects the power current supply when a signal of the sensor confirming the coupling is absent. In the method according to the invention, at least one contact element which is switched off is first electrically connected to the counter contact element on the housing side, which is provided for supplying current to the pump unit. The power current is then applied to the contact element on the basis of a signal confirming the corresponding contacting.

Motor-driven medical suction pump and method for connecting such a suction pump to a power source

Medical suction pump

A diaphragm vacuum pump has a pump chamber, a vacuum diaphragm for generating an underpressure in the pump chamber, an electric motor () with a motor shaft, a gear and a connecting element. The gear converts a rotational movement of the motor shaft into a cyclical, approximately linear forward and rearward movement of the connecting element, as a result of which the connecting element effects a cyclical movement of the vacuum diaphragm. The rearward movement of the connecting element per cycle is effected by a first rotation angle of the motor shaft which, on account of the gear, is not of the same magnitude as a second rotation angle of the motor shaft, wherein the second rotation angle effects the forward movement of the connecting element per cycle. The diaphragm vacuum pump according to the invention can be designed such that it is small and quiet and yet provides optimal power.

Diaphragm vacuum pump

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Lucerne, Switzerland

Adrian Honegger