E - Fixed Constructions – 02 – B
Patent
E - Fixed Constructions
02
B
61/46, 61/92
E02B 7/20 (2006.01) E21D 21/00 (2006.01) F16B 37/08 (2006.01)
Patent
CA 2008982
A B S T R A C T A nut (15), for tensioning a rock-anchor-rod, has a tubular body (25) with a saw-tooth thread (28). The body (25) of the nut is divided, by a plurality of longitudinal slots, into segments (31). The said segments are connected together by cross-sectionally U-shaped resiliently flexible ribs (26). One end-face of the nut (15) has a convex-spherical flange (17) which bears against an anchor-plate. The slots (30) extend through the flange (17) as far as the inner wall of the ribs (26). Between the ribs (26), the flange (17) carries radial incisions (37) extending as far as the body (25) of the nut. As a result of this the segments (31) are tangentially resilient. In order to tension the anchor-rod, the nut (15) is pushed axially onto the saw-tooth thread of the rod. The jaws of a tensioning device engage in the thread at the free end of the rod and bear against the nut (15). When the said cheeks apply tension to the anchor-rod, the nut (15) is pressed to the anchor-plate. This ensures rapid and accurate preloading of the anchor-rod. (Fig. 3).
Bereskin & Parr
H. Weidmann Ag
Isler Erwin
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