Pressure control arrangement for a breast pump system

摘要

The invention relates to a pressure control arrangement for a breast pump system comprising a first pressure chamber; a first opening for receiving milk, the first opening being in connection with the pressure chamber and the first opening being arranged to have a first tube connected to the first opening; a second opening in connection with the pressure chamber, the second opening being arranged to have a second tube connected to the second opening for connecting the pressure chamber to an under pressure source; and a third opening for delivering milk to a container, the third opening comprising a first valve for closing the pressure chamber if the pressure in the pressure chamber is substantially lower than on the other side of the third opening. By providing the first pressure chamber in combination with the first valve, a space with substantially constant size is provided at each pumping cycle.

主权项

1. Pressure control arrangement for a breast pump system comprising:
a) a first pressure chamber; b) a second pressure chamber connected to the first pressure chamber via a flow control element disposed between the first pressure chamber and the second pressure chamber, the flow control element being arranged for impeding or preventing milk flowing from the first pressure chamber to the second pressure chamber; c) a first opening for receiving milk, the first opening being in connection with the first pressure chamber and the first opening being arranged to have a first flexible tube connected to the first opening; d) a second opening in connection with the second pressure chamber, the second opening being arranged to have a second flexible tube connected to the second opening for connecting the first pressure chamber to an underpressure source; and e) a third opening for delivering milk to a container, the third opening being in connection with the first pressure chamber and the third opening comprising a first valve for closing the third opening if the pressure in the first pressure chamber is substantially lower than on the other side of the third opening; wherein the first flexible tube and the second flexible tube have a length that is significantly larger than a diameter of the respective tube.