| 摘要 |
A dispenser (20) has a container body (22), a closure valve assembly (24), and a cap. The closure valve assembly has: a seat (100) having an opening (122); a valve element (90); and a plurality of radially inwardly directed petals (106). The valve element is shiftable between: an open position depressed clear of the opening; and a closed position closing the opening. The petals support the valve element with flex spring bias toward the closed position. The cap has: a closed condition depressing the valve element to the valve element's open position; and an open condition disengaged from the valve element.
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