Abstract: A vane pump having an electric drive unit with a drive shaft, a pump chamber, a rotor arranged in the pump chamber so as to rotate about a rotational axis, and a driver that has at least one driver pin and is connected in a rotationally fixed manner to the drive shaft, wherein, in an operating state of the vane pump, the driver pin, by way of a contact surface of the driver pin designed as a section of a lateral surface, engages in a torque-transmitting manner with a contact surface of the rotor delimiting a rotor recess designed to correspond to the driver pin. In order to improve a vane pump, it is proposed that the contact surface of the rotor is designed and arranged in such a manner that the rotational axis lies in the contact surface when this contact surface is hypothetically extended toward the rotational axis.

Abstract: A vane pump having an electric drive unit with a drive shaft, a pump chamber, a rotor arranged in the pump chamber so as to rotate about a rotational axis, and a driver that has at least one driver pin and is connected in a rotationally fixed manner to the drive shaft, wherein, in an operating state of the vane pump, the driver pin, by way of a contact surface of the driver pin designed as a section of a lateral surface, engages in a torque-transmitting manner with a contact surface of the rotor delimiting a rotor recess designed to correspond to the driver pin. In order to improve a vane pump, it is proposed that the contact surface of the rotor is designed and arranged in such a manner that the rotational axis lies in the contact surface when this contact surface is hypothetically extended toward the rotational axis.

Abstract: A brewing unit for a coffee machine has a brewing cylinder on a second end of which an end plate is pivotal between a closed position and an open position. A piston is axially movable in the cylinder away from the first end of the cylinder past the fill opening to compact coffee introduced through a fill opening at the second end in a brewing position and from the brewing position toward the second end in the open position of the end plate into an eject position to eject the used ground coffee from the brewing chamber. A pair of gear wheels flank the cylinder at the second end. Respective coupling plates each having an inner end pivoted on a respective one of the wheels and an outer end pivoted on the end plate about an actuating axis. A drive synchronously rotates both wheels.