Patent ID: 7717619

Claim:
An apparatus for transmitting power and data, said apparatus comprising: a rotary transformer having first and second transformer portions relatively rotatable around a common axis and separated from one another by a gap; differential windings on the first and second transformer portions, the differential windings configured to transfer power between the first and second transformer portions across the gap in a contactless manner; a first data transmitter and a first data receiver on the first transformer portion; and a second data transmitter and a second data receiver on the second transformer portion, the first data transmitter communicating data to the second data receiver and the second data transmitter communicating data to the first data receiver across the gap in a contactless manner wherein the first data receiver is cantilevered over the first data transmitter such that the first data transmitter is between the first data receiver and the common axis, further wherein the second data receiver is cantilevered below the second data transmitter such that the second data receiver is between the second data transmitter and the common axis.