| 摘要 |
1,228,635. Pins. W. V. WOLFF, and D. BERTELSMANN. 8 Aug., 1968 [14 Aug., 1967], No. 37834/68. Heading F2H. A pin for insertion into a hole drilled in a concrete or like structure for anchorage purposes comprises a tapering shank portion of substantially truncated cone shape and a head 3. The chank 2 may be provided with a cylindrical portion 5 of the same diameter as that of the major diameter end of the tapering portion and may be provided with a tapped hole (4) (Figs. 2, and 13, not shown) or an external thread (12) (Fig. 12, not shown). The shank 2 may be provided with longitudinal or helical ribs or annular grooves. |
