| 摘要 |
<p>A curing rim comprising two abutting, coaxial, relatively rotatable sleeves (11, 12), one having radially inward bosses (20) and the other having axially projecting hooks (21) which can rotate into engagement with the bosses to prevent axial displacement between the sleeves. A latch hook (30) is pivoted to one of the hooks and resiliently engages the apposed boss to prevent rotation between the sleeves. A push bar (24) is passed through a pair of loops (22 and 23) and has a projection (37) which can engage the latch hook to disable its function.</p> |
