Patent ID: 9217426
Filing Date: 2015-12-22
Classification: F04B

Abstract:
1. A pump, comprising: an inlet opening; an outlet opening; a pump diaphragm comprising an opening, provided with a passive check valve, through the pump diaphragm; an actuator configured to move the pump diaphragm between a first position and a second position, wherein the passive check valve is configured such that a movement from the first position in the direction toward the second position closes the passive check valve, and that a movement from the second position in the direction toward the first position opens the passive check valve, so that a pumping cycle wherein the pump diaphragm is moved from the first position to the second position, and back, causes a net flow from the inlet opening to the outlet opening; a further pump diaphragm comprising an opening, provided with a further passive check valve, through the further pump diaphragm; a further actuator configured to move the further pump diaphragm between a third position and a fourth position; and a spacer arranged between the pump diaphragm and the further pump diaphragm which, along with the pump diaphragms, defines a pump chamber, wherein the outlet opening is formed by the opening within the pump diaphragm and is provided with the passive check valve, and wherein the inlet opening is formed by the opening within the further pump diaphragm and is provided with the further passive check valve, wherein the actuator and the further actuator are configured to move the pump diaphragm and the further pump diaphragm such that the volume of the pump chamber is increased during a suction phase, and that the volume of the pump chamber is reduced during a pumping phase, wherein the passive check valve is configured such that a movement of the pump diaphragms during the suction phase closes the passive check valve, and that a movement of the pump diaphragms during the pumping phase opens the passive check valve, wherein the further passive check valve is configured such that a movement of the pump diaphragms during the suction phase opens the further passive check valve, and that a movement of the pump diaphragms during the pumping phase closes the further passive check valve, wherein the actuator and the further actuator are configured to move the pump diaphragm and the further pump diaphragm in opposite directions during the suction phase, and to move the pump diaphragm and the further pump diaphragm in opposite directions during the pumping phase, wherein first main surfaces of the pump diaphragm and first main surfaces of the further pump diaphragm are arranged opposite to one other, wherein the actuator and the further actuator are respectively arranged on second main surfaces of the pump diaphragm and second main surfaces of the further pump diaphragm that are respectively opposite to the first main surfaces of the pump diaphragm and the first main surfaces of the further pump diaphragm, wherein the spacer includes a first surface facing the pump diaphragm and spaced therefrom in a non-deflected state of the pump diaphragm and a second surface facing the further pump diaphragm and spaced therefrom in a non-deflected state of the further pump diaphragm, and wherein contours of the first and second surfaces are adapted to contours of the pump diaphragm and the further pump diaphragm in a deflected state and extend between the first main surfaces of the pump diaphragm and the first main surfaces of further pump diaphragm to overlap with the actuator and the further actuator in a plan view.