| 摘要 |
1529534 Self-drilling masonry anchor ILLINOIS TOOL WORKS Inc 17 Feb 1977 [23 Feb 1976] 6664/77 Heading F2H [Also in Division B3] A self-drilling masonry anchor 10 comprises a sleeve portion 12 having a bore 18 and socket 22 for a driving tool, and a drill portion 14 having a threaded bore 36, the two portions being connected by a frangible wall 16. In use, the anchor may be drilled into masonry using a rotary percussion hammer device. After drilling to a predetermined depth, the upper surface is impacted causing fracture of wall 16 and telescoping of the sleeve portion over part of the drill portion so as to set the anchor in the bore in the masonry. A mating bolt may then be threaded into bore 36 to attach a fixture. |
