| 摘要 |
<p>A non-slip pulley includes a pulley wheel (10) mounted on a shaft (12) and a belt (14) extending around it. The belt can include notches (15) which engage with retractable studs (26) to reduce slippage of the belt (14) on the pulley wheel (10). The studs (26) can extend by gravity, centrifugal force or as appropriate.</p> |
