Patent ID: 6681789
Filing Date: 2004-01-27
Classification: B60K,F16K,Y10T

Abstract:
The method for substantially preventing fuel emissions comprising the steps of:Providing a tank containing volatile fuel and wherein said volatile fuel has a vapor pressure; Positioning a flexible bladder within the tank above the fuel and containing air under a second pressure; and connecting a vent to said flexible bladder and through which air may alternately be received into and emitted outside of said flexible bladder; in response to an increase in said vapor pressure above said second pressure, emitting at least a portion of said air located in an interior of said flexible bladder outside of said flexible bladder through said vent until said vapor pressure and said second pressure equilibrate; in response to a decrease in said vapor pressure bellow said second pressure, receiving air located outside of said flexible bladder to be received into said flexible bladder through said vent until said vapor pressure and said second pressure equilibrate.