| 摘要 |
An ascender/descender has two, three, or more clamping elements which in one position allow a rope to freely pass through canted aligned main openings in the elements, and in another position securely clamp the rope so that it essentially will not move with respect to the elements. The openings have a substantially completely enclosed periphery surrounding the rope. The clamping elements are in two parts, pivotal with respect to each other from an open position in which a rope may be moved sideways into the main openings, to a closed position in which the rope is held within the openings. The component parts of each clamping element are releaseably held together by a detent member and a guide pin (and associated slot). The clamping elements are pivotally connected together by a connecting element that has torsional rigidity but is flexible in at least one plane, such as a chain.
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