Patent ID: 8198755

Claim:
Device for contactless energy and data transmission, having a primary unit provided with a primary inductor, having a secondary unit provided with a secondary inductor, and which is set up for at least one of the connection, the supplying, and the controlling of at least one terminal device, the primary unit and the secondary unit at least temporarily being so positioned relative to one another that a transformer coupling distance is formed between the primary inductor and the secondary inductor, wherein the primary unit is set up for the contactless transmission of energy to the secondary unit across the transformer coupling distance and wherein the secondary unit is set up for supplying the terminal devices by means of the energy received across the transformer coupling distance, wherein the primary unit has means for interrupting the energy transmission across the transformer coupling distance in energy transmission intervals, wherein the secondary unit has means for detecting the energy transmission intervals, wherein the primary unit has means for transmitting data through the variation of at least one of the length of the energy transmission intervals and the length of the energy transmission phases to the secondary unit and wherein the secondary unit has means for transmitting data to the primary unit across the transformer coupling distance in the energy transmission intervals.