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Safety fuel tank and filler cap apparatus

  • US 6,260,516 B1
  • Filed: 12/01/1999
  • Issued: 07/17/2001
  • Est. Priority Date: 03/11/1999
  • Status: Expired due to Fees
First Claim
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1. A safety fuel tank and filler cap apparatus for supplying liquid fuel to an internal combustion engine comprising:

  • a) an internal combustion engine body that includes an exposed fuel tank having a fill opening for containing said liquid fuel, an annular fuel filler flange surrounded by an adjoining fuel tank outer surface, said flange having a central axis;

    b) a filler cap that fits the fuel filler flange to form a closure of the tank at the fill opening when the cap center generally aligns with the flange central axis, said filler cap and adjoining fuel tank outer surface being configured to enable a user to grip and turn said fuel filler cap; and

    c) a locking mechanism that includes an actuator that prevents the cap from being removed when the engine temperature is above a predetermined temperature that is below the ignition temperature of said liquid fuel or its vapor.

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