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Apparatus for introducing a fuel additive to the fuel tank of an automotive vehicle

  • US 4,936,261 A
  • Filed: 04/21/1989
  • Issued: 06/26/1990
  • Est. Priority Date: 05/06/1988
  • Status: Expired due to Fees
First Claim
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1. Apparatus for introducing an additive from a reservoir into the fuel tank of an automotive vehicle, comprising:

  • pumping means comprising a fluid pressure actuated displacement pump including first and second chambers;

    means for selectively connecting said first chamber to a source of fluid pressure;

    first valve means for admitting additive to said second chamber in response to fluid pressure being applied to said first chamber; and

    second valve means for connecting said second chamber to said fuel tank in response to fluid pressure being removed from said first chamber.

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