| 摘要 |
A cap (12) is provided for a filler neck (14) having an open mouth (22) and two internal mounting flanges (38, 40) adjacent to the open mouth (22). Cap (22) comprises a handle (18), a body (16) coupled to handle (18) for rotation therewith, an annular seal (34) around body (16), first and second external position-locator lugs (78, 80) appended to body (16) and arranged to lie in spaced-apart relation to annular seal (34), and first and second spiral-shaped cap mounting members (86, 88) appended to body (16) to lie in a position between annular seal (34) and first and second external position-locator lugs (78, 80). The spiral-shaped cap mounting members (86, 88) are adapted to engage against the internal mounting flanges (38, 40) of the filler neck upon installation of body (16) in filler neck (14) to retain cap (12) in filler neck (14) and annular seal (34) in compression to establish a liquid fuel and vapor seal between cap (12) and filler neck (14).
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