| 摘要 |
<p>A fuel filler pipe seal (50) includes upper (54) and lower (58) portions and a sealing lip (52) positioned at the juncture of the upper and lower portions to engage an outer surface of a fuel nozzle and prevent the escape into the atmosphere of fuel fumes during a fueling operation. The lip (52) lies in a plane (64) which intersects a groove (68) formed in an outer surface of the seal to receive a seat (30) formed on a mounting bracket (22) mounted in an upper end of the filler pipe (l2), and the upper portion (54) of the seal has an umbrella valve (70) formed integrally with it which covers a vent opening (28) in the bracket and is preloaded to release at a predetermined pressure. By positioning the sealing lip adjacent the seat-receiving groove a better seal with a fuel nozzle is formed, premature release of the umbrella valve is avoided, and damage to the seal when the nozzle is thrust into the filler pipe is minimized.</p> |
