Patent ID: 9450423
Filing Date: 2016-09-20
CPC Classification: H01F,H02J

Claim Text:
1. A wireless power transmission apparatus comprising: a mounting member; an upper transmission coil on the mounting member; a lower transmission coil under the mounting member; a first terminal connected with an outer connection part of the upper transmission coil and an inner connection part of the lower transmission coil; and a second terminal connected with an inner connection part of the upper transmission coil and an outer connection part of the lower transmission coil, wherein the upper transmission coil and the lower transmission coil are bilaterally symmetrical to each other about a central axis between the first and second terminals, wherein the upper and lower transmission coils comprise: outer coil parts connected with the outer connection parts and formed in one-turn; and inner coil parts connected with the outer coil parts, provided inward of the outer coil parts, connected with the inner connection parts, and formed in a half-turn, wherein the inner coil parts comprises: a first inner coil part connected with the outer coil parts and provided adjacent to the outer coil parts; a second inner coil part connected with the first inner coil part: a third inner coil part connected with the second inner coil part: and a fourth inner coil part connected with the third inner coil part and connected with the inner connection part, and wherein the second inner coil part has a radius less than a radius of the first inner coil part, the third inner coil part has a radius less than a radius of the second inner coil part, and the fourth inner coil part has a radius less than a radius of the third inner coil part.