Abstract: A device for frothing milk with a base element including a container for receiving milk to be frothed and a removable lid including a motor for driving a circular annular spring for frothing milk, the latter being driven by a motor in the lid. To this end, electrical energy needs to be transferred to the motor. This is done using inductive coupling. This removes the need for providing bare electrical contacts thus removing disadvantages like risk of short circuit and electrical shock hazards. To achieve this, both the base element and the lid are fitted with windings for transferring electrical energy. To improve the effectiveness of inductive coupling, frequency conversion means are provided to supplying an alternating current at a relatively high frequency to the first winding. The first winding is used as an inductive element for an oscillator as well.

Abstract: A device for frothing milk with a base element including a container for receiving milk to be frothed and a removable lid including a motor for driving a circular annular spring for frothing milk, the latter being driven by a motor in the lid. To this end, electrical energy needs to be transferred to the motor. This is done using inductive coupling. This removes the need for providing bare electrical contacts thus removing disadvantages like risk of short circuit and electrical shock hazards. To achieve this, both the base element and the lid are fitted with windings for transferring electrical energy. To improve the effectiveness of inductive coupling, frequency conversion means are provided to supplying an alternating current at a relatively high frequency to the first winding. The first winding is used as an inductive element for an oscillator as well.

Abstract: Methods and devices for frothing milk. The device includes a main body that forms a container for the milk, a cover fitting onto the main body, an agitator for frothing milk and a driver for driving the agitator. The driver is received at least partially in the cover. The driver is provided with a driver electric contact. The main body is provided with an upper main body electric contact and a first recess for receiving at least partially the driver. The first recess and the driver are shaped in such a way that electrical contact between the driver electric contact and the upper main body electric contact automatically is made when the cover is fitted on the main body and the first recess receives at least a part of the driver.

Abstract: Methods and device for frothing milk. The device includes a main body forming a container for the milk, a cover fitting onto the main body, agitation means and drive means for driving the agitation means. The drive means are received at least partially in the cover. The device further includes a base plate provided with a first electric contact. The main body is provided with a second electric contact, which makes electrical contact with the first electric contact when the main body is placed on the base plate. The drive means are provided with a third electric contact. The main body is provided with a fourth electric contact, which makes electrical contact with the third electric contact when the cover is placed on the main body. The main body is provided with an electric conductor which forms an electrical connection between the second electric contact and the fourth electric contact.

Abstract: Methods and device for frothing milk. The device includes a main body forming a container for the milk, a cover fitting onto the main body, agitation means and drive means for driving the agitation means. The drive means are received at least partially in the cover. The device further includes a base plate provided with a first electric contact. The main body is provided with a second electric contact, which makes electrical contact with the first electric contact when the main body is placed on the base plate. The drive means are provided with a third electric contact. The main body is provided with a fourth electric contact, which makes electrical contact with the third electric contact when the cover is placed on the main body. The main body is provided with an electric conductor which forms an electrical connection between the second electric contact and the fourth electric contact.