| 摘要 |
1512091 Wedges G K CAMPBELL 14 May 1975 [17 May 1974] 20448/75 Heading F2K [Also in Division B8] A mountaineering chock 10 comprises a rigid body 11, a U-shaped passage therein through which a rope runner 16 extends, the passage opening through a bottom surface of the chock towards which surface the opposed pairs of sidewalls of the chock converge. Each or one side wall of each pair of sidewalls includes one or more upwardly extending recessed portion 12c, 13c and the top surface 14a of the block, which is tapered relative to the said bottom surface, includes a recessed portion 14c aligned with the portion 12c. The dimensions between the sidewalls of each pair and between the top and bottom surfaces, are all different to provide a choice of three wedge widths. A non-tapered cap portion 19 positioned at the upper end of the tapered side walls 12a, 13a strengthens the sharp edge taper top, a similar non-tapered cap portion 19a being positioned at the tapered out end of the top surface 14a. In another embodiment, Figs. 2-4 (not shown) the upper surface of the chock is apertured to facilitate feeding of the rope or webbing runner. In another embodiment, Fig. 20 (not shown) the webbing runner is locked in a tapered passage in the chock, by a separate wedge member around which the runner is folded before insertion into the passage through an aperture in the top surface of the chock. In a further embodiment, Fig. 22 (not shown) a loop of webbing runner is passed up into a blind topped tapered passage in the chock and a separate wedge member is passed into the loop within the passage via laterally extending passage through the chock. |
