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Apparatus for maintaining a constant radial distance between a transmitting circuit and an antenna coil

  • US 5,844,130 A
  • Filed: 03/24/1997
  • Issued: 12/01/1998
  • Est. Priority Date: 04/03/1996
  • Status: Expired due to Fees
First Claim
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1. A vehicle comprising:

  • a frame member;

    a circular vehicle wheel mounted for rotation relative to said frame member about a rotation axis;

    a transmitting circuit mounted on said vehicle wheel for rotation therewith about said axis; and

    a non-planar antenna coil mounted on said frame member spaced from said transmitting circuit so that a constant radial air gap is maintained between said transmitting circuit and said non-planar antenna coil when said non-planar antenna coil is adjacent said transmitting circuit, and said non-planar antenna coil including arcuate side segments and substantially parallel end segments between said arcuate side segments, said side segments and said end segments lying on the surface of a cylinder that is approximately centered on said axis.

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