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Apparatus and method for measuring the speed of a buried transmission component

  • US 7,219,783 B2
  • Filed: 04/20/2005
  • Issued: 05/22/2007
  • Est. Priority Date: 04/20/2005
  • Status: Active Grant
First Claim
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1. A transmission having a clutch assembly, comprising:

  • a clutch housing with non-rotatable plates mounted with respect to a transmission ground;

    a clutch hub rotatable with respect to said transmission ground and more radially inwardly nested in the transmission with respect to said clutch housing;

    a speed sensor responsive to magnetic fields and mounted with respect to said clutch housing; and

    a clutch fiber plate splined to said clutch hub for rotation therewith;

    said clutch fiber plate having a steel core and a heterogeneous outer diameter on said steel core to enable said clutch fiber plate to generate magnetic field pulsations for speed sensing.

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