| 摘要 |
<p>To avoid complex, larger, expensive automatic closers having ineffective braking of the slamming of the closure, a retraction device (10) including a drum (18), a coiled spring power assembly (22) for driving the drum, a centrifugal brake (24) for controlling the power assembly and the drum to eliminate slamming of the panel during closing, and a gear train transmission assembly (26) to connect the power assembly and the centrifugal brake. In one embodiment, the drum is a spool which carries a cable (20) to connect the panel to the retraction device. In another embodiment, the drum has a rim (131) which frictionally engages a frame (12a) supporting the closure. The centrifugal brake is adjustable to take into account a wide range of closure sizes and frictional conditions.</p> |
