公开(公告)号：US12194483B2

公开(公告)日：2025-01-14

申请号：US17927958

申请日：2021-05-28

Applicant: Promens SA

Inventor： Sabine Goettke ,  Gwénael Doulin ,  Pascal Hennemann

IPC: B05B11/00 ,  B05B11/10 ,  F04B19/04 ,  F04B53/14

Abstract: A pump for dispensing a fluid, has a pump head, a piston body with a piston, a pump chamber limited by a pump chamber body, an inlet valve and an outlet valve, the piston being moveable by respective movement of the pump head between an upper starting position and a lower end position. A return stroke force for a return stroke from the lower end position into the upper starting position is provided by a bellows, formed by two bellows arranged one above the other, Each of the bellows is folded up, when moving the pump head into the lower end position, by exerting a compression force on the pump head, the first bellows receiving the compression force by direct engagement with the pump head, the second bellows receiving the compression force only by engagement with the first bellows.