Abstract: What is illustrated and described is a pump assembly (1) for a pump, particularly for a miniature pump, with an electric motor (2) and with a housing unit (3), wherein the electric motor (2) has a motor shaft (5) passing freely through a motor housing of the electric motor (2) and the motor housing is connected to the housing unit (3), and wherein the motor shaft (5) is supported in the motor housing with an axial shaft play. According to the invention, at least one stabilizing element (6, 13, 14, 16) arranged outside of the motor housing is provided in order to reduce or eliminate the axial play of the motor shaft (5), with an axial compressive force or axial tensile force acting on the motor shaft (3) being applied by the stabilizing element (6, 13, 14, 16) to the motor shaft (5).

Abstract: Depicted and described herein is a diaphragm pump (1) for conveying a gaseous and/or liquid medium, having at least one deformable membrane (2) for changing the size of a work chamber (3) of the diaphragm pump (1), and having at least one actuating unit (4) for deforming the membrane (2) by means of applying contact-free force to the membrane (2) using a magnetic field, wherein the membrane (2) comprises and/or consists of a material which is magnetic and/or magnetizable, and the actuating unit (4) features at least one magnetic and/or magnetizable actuating means (7). According to the invention, the actuating unit (4) is rotatably mounted and the membrane (2) is arranged circumferentially with respect to the actuating unit (4), wherein, in a dead point position of the membrane (2), the polarization direction of the magnetic field generated between the material of the membrane (2) and the actuating means (7) is oriented in a direction radial to the axis of rotation of the actuating unit (4).

Abstract: What is illustrated and described is a pump assembly (1) for a pump., particularly for a miniature pump, with an electric motor (2) and with a housing unit (3), wherein the electric motor (2) has a motor shaft (5) passing freely through a motor housing of the electric motor (2) and the motor housing is connected to the housing unit (3), and wherein the motor shaft (5) is supported in the motor housing with an axial shaft play. According to the invention, at least one stabilizing element (6, 13, 14, 16) arranged outside of the motor housing is provided in order to reduce or eliminate the axial play of the motor shaft (5), with an axial compressive force or axial tensile force acting on the motor shaft (3) being applied by the stabilizing element (6, 13, 14, 16) to the motor shaft (5).