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Apparatuses and methods for fuel level sensing

  • US 9,488,515 B2
  • Filed: 03/24/2014
  • Issued: 11/08/2016
  • Est. Priority Date: 03/24/2014
  • Status: Active Grant
First Claim
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1. A sensor, comprising:

  • a sealed housing comprising a pivot end, a float end opposite the pivot end and an interior defined by walls extending therebetween, wherein the pivot end is adapted to join to a pivot point and the float end is adapted to join to a float at an exterior of the housing; and

    an electrically conductive coil spring disposed in the housing interior, wherein;

    a first end of the coil spring is joined to the housing at one of the pivot end or the float end;

    a second end of the coil spring opposite the first end is joined to an internal float within the housing;

    the coil spring is adapted to expand and retract in response to movement of the internal float within the housing;

    the coil spring is electrically coupled between the pivot end and the float end of the housing; and

    the coil spring is adapted to electrically couple to a circuit configured to sense a change in resistance in the coil spring in response to expansion and retraction of windings of the coil spring.

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