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Device for transmitting signals via induction between a transponder circuit and an interrogation circuit

  • US 7,719,406 B2
  • Filed: 03/02/2004
  • Issued: 05/18/2010
  • Est. Priority Date: 03/03/2003
  • Status: Active Grant
First Claim
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1. A device for transmitting inductive signals, the device including a transponder circuit having at least one first coil, said transponder circuit being placed on an object, which is a vehicle wheel, capable of rotating about at least one rotational central axis passing through the object, and an interrogation circuit having at least one second coil, said interrogation circuit being placed on a structure to which the object is connected, said structure being a part of the body or chassis of said vehicle, wherein an annular coupling coil, provided with at least one closed loop turn, is mounted on a tire of the vehicle wheel coaxially to the rotational vehicle wheel axis of the vehicle wheel, said annular coupling coil acting as an inductive coupling interface between the first coil and the second coil in order to have a transmission of signals independent of the rotation of the vehicle wheel.

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