| 摘要 |
PCT No. PCT/GB89/01302 Sec. 371 Date Jul. 10, 1991 Sec. 102(e) Date Jul. 10, 1991 PCT Filed Nov. 1, 1989 PCT Pub. No. WO90/04998 PCT Pub. Date May 17, 1990.A device whereby personnel or other loads may descend from an elevated position at a controlled and variable speed, comprising a restraining member (12) having a series of slots (13). A tape stored in a container (20) passes through the slots (13) to a hook (10) for attachment of the device to a fixed point. A user wearing a harness (21) removably attached to the restraining member (12) may descend at a controlled rate determined by a light load applied to the tape (11) below the restraining member (12) owing to the frictional contact of the tape (11) passing around the edges of slots (13). After the descent a quick release shackle (16) releases the harness (21) from the device.
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