| 摘要 |
1,004,562. Anchor-nuts and anchor-bolts; bolt-hole bushes; bearings. JOHN WALSH & CO. (INSERTS) Ltd. Feb. 14, 1963 [March 2, 1962], No. 8269/62. Headings F2A and F2H. A spindle bearing, a bush (with a non- circular or splined bore for receiving a rod or with a bore for receiving a bolt and nut or a rivet), an anchor-bolt or as shown an anchornut, has a head 1 and a skirt 2, the underside 5 of the head having projections 6 upset from the underside by knurling of grooves 3 on the side of the head and the skirt having sharp projections formed by aluminium oxide particles or knurling 7 for biting into sheet material when the skirt 2 is passed through a hole in the sheet and peened over for securement. In the case of the bolt, the head 1 is solid and is screw-threaded or grooved. The aluminium oxide particles if used are embedded in or cemented to the surface of skirt 2. The projections 6 on the head 3 are V-shaped projections forming a sharp wavy ridge. In the nut shown, the bore 9 of the skirt tapers to a shoulder 10 around the end of the threaded bore 8 of the nut.
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