Interthreaded fastening assembly

摘要

1,010,947. Anchor-bolts; locking nuts; preventing over-tightening; securing nuts against loss. CAMLOC FASTENER CORPORATION. June 12, 1962 [June 12, 1961], No. 22498/62. Heading F2H. A panel 14, Fig. 3, has a hole 72 in which a spring 10 retains a nut 12 with a flange 641 for abutting the spring when the nut is raised. When the nut is threaded on a screw 40, Fig. 3a, the panel 14 is held on a frame member 16 to which is secured a carrier 18 for anchoring the screw. To prevent the joint being overtightened, the nut may be formed with a weakened frangible portion, Figs. 5, 6 (not shown), or the screw may have a weak neck 44. The bearing flange 61 of the nut 12 may be countersunk for flush fitting and instead of a hexagonal socket 62 the nut may have wings or a slot. The recess 13 for the retaining spring 10 may be formed in the frame 16. The panel 14 and frame 16 are held between the nut flange 61 and a clamping ring 22. The latter has a bevelled surface 30 for co-action with bevels 28 on spring fingers 26 (of the carrier 18) formed by slots 24, so that the fingers are urged inwardly to grip and lock the nut 12 against rotation. Ears 25 on the carrier 18 extend into slots 23 in the ring 22. A dished ring 20 has lugs 34 with holes in which bushes 36 on lugs of a retaining ring 32 are secured. Rivets secured to the frame 16 pass through the bushes 36. The ring 32 retains the ring 22 in the dished ring 20 and has notches 31 to receive projections 21 to prevent rotation of the ring 22. The dished ring 20 holds the top of the carrier 18, the bottom of which has a flange 50, deformed as shown, when the screw head 45 is placed in the carrier with its projections 46 lodged in slots 51 to prevent rotation of the screw. In a modification, Fig. 4, the dished ring 20 is replaced by a cylinder 201 secured to the frame 16 by rivets 17 and by a threaded ring 82 having a bevelled surface 84 for urging inwards the spring fingers 26 of the carrier 181. Grooves 19 on the carrier 181 are engaged by ribs 21 in the cylinder 201 to prevent rotation.