| 摘要 |
An overfill prevention device (40, 240) is provided for preventing overflow of a fluid storage tank (10, 110). The overfill prevention device includes a filler cup (42, 242) designed to fit within the fill opening (24, 124) of the tank body (12, 112) and attach thereto. A seal (54, 154, 156) that is adapted for receiving and sealing to a fill nozzle (28) is placed between upper (44) and lower (46, 146) regions of the filler cup. A breather piece (64), which defines a vapor path with first (70) and second (71) openings, is integrated with the filler cup. The first opening (70) of the breather piece is fluidly coupled to the lower cup region (46, 246), whereas the second opening (71) is positioned above the first opening, located at or below the full level (Hf) of the storage tank.
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