Patent ID: 11904077
Assignee: MEDELA HOLDING AG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 21:
22. A breastpump for expressing human breastmilk, wherein the breastpump comprises a breast shield with an interior for receiving a mother's breast and a pump chamber comprising a first cup and a flexible pump membrane, wherein the pump membrane rests against the first cup in sealing fashion and the pump membrane is driven and a cyclically changing negative pressure is producible in the pump chamber as a result of movement of said pump membrane relative to the first cup, wherein the cyclically changing negative pressure is appliable to the interior by means of the pump chamber, wherein a milk channel leads from the interior into the pump chamber through a first inlet opening, the expressed breastmilk flowing through said milk channel from the interior of the breast shield into the pump chamber, wherein the pump chamber has an outlet opening, through which the expressed breastmilk flows from the pump chamber into a milk collection container, wherein the outlet opening, at least at a start of an expressing process, is arranged in an upper region of the pump chamber and/or above the first inlet opening in a vertical use position of the breastpump, and wherein the first cup has an outlet groove that extends from the outlet opening of the pump chamber to an output, the outlet groove, at least over a portion, extending in a direction of fluid flow perpendicular to a movement direction of the pump membrane and the pump membrane closes off the outlet groove of the first cup to form a channel for fluid flow between the outlet opening and the output.