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Method and Structure for Prevention of Incorrect Fueling Operations

  • US 20140311618A1
  • Filed: 03/19/2014
  • Published: 10/23/2014
  • Est. Priority Date: 06/03/2011
  • Status: Active Grant
First Claim
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1. An apparatus for alerting a refueler to the attempted introduction of an incorrect liquid into a tank for storing the liquid, the tank having a filler neck through which the liquid enters the tank, comprising:

  • a ring having a diameter suitable for being disposed around the filler neck of a tank;

    multiple displaceable mechanical elements disposed around the ring such that the physical elements are displaced when a nozzle is introduced into the filler neck;

    a switch associated with each of the multiple displaceable mechanical elements, each switch having a state that is changed when the physical element is displaced;

    an indicator to indicate to a user when a nozzle having a diameter smaller than a specified value is inserted; and

    a circuit to activate the indicator when at least one of the displaceable mechanical elements is displaced and fewer than all of the displaceable mechanical elements are displaced.

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