| 摘要 |
977,378. Fasteners. F. W. ROHE. May 16, 1963 [Jan. 2, 1963], No. 26376/64. Divided out of 977,377. Heading F2H. [Also in Division B3] A one-piece fastener D is secured in a blind bore 60 of a sandwich panel A, and comprises a head 28 having flutes 30, a weakened section 62, and a screw-threaded blind bore 36. The fastener is installed by a tool, comprising an anvil 71, a nut 73 having a left-hand thread, and a bolt 75, which co-operates with the nut, and is screwed into the fastener. In operation with the fastener screwed on to bolt 75, the former is passed through a hole 19 in the panel and a hammer blow is struck on the bolt until the skin 15 is dimpled. Bolt 75 is rotated in the direction of arrow 78, with the anvil held stationary, the bolt is retracted through the anvil, and the portion 62 of the fastener collapses, thus locking flutes 30 in skin 15. |
