| 摘要 |
A closure assembly has a closure element which is releasably engaged with a shipping and storage container for selectively restricting the flow of fluid through a discharge outlet in the container. The closure element has a longitudinal axis with a first axial end received in the opening and a second axial end having a peripheral flange outside the container. An axially opening slot with oppositely inclined sidewalls is provided in the peripheral flange for seating an annular seal member, whereby the seal member is captured in sealing relation between the peripheral flange and the container for reducing leakage through the outlet. The seal member is a deformable ring which has an undeformed state in which a first surface on the ring engages an end wall of the slot and an arcuate second surface on the ring extends beyond the axial opening.
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