| 摘要 |
A fastener device for closing a fluid reservoir (1) formed with a neck (10) provided with outer peripheral reinforcement (11) that co-operates with the remainder of the neck to define a bottom shoulder (12). The device includes a fastener ring (2) for holding a closure member (4) on the neck (10), the fastener ring (2) including a peripheral skirt (21) engaged around the neck to below the bottom shoulder (12). The skirt (21) has fastener elements (26a, 26b) that form a contact zones (27a, 27b) suitable for potentially engaging the neck (10) below the bottom shoulder (12). The contact zones (27a, 27b) are situated at different axial heights, such that some contact zones (27a; 27b) come into operating engagement below the bottom shoulder (12), while other contact zones (27a; 27b) remain inoperative. |
