| 摘要 |
1,172,497. Pipe joints. H. KREIDEL, and H. KREIDEL JR. 10 April, 1968 [14 April, 1967], No. 17389/68. Addition to 1,085,166. Heading F2G. In the connection described in the parent Specification wherein a packing ring 3 is axially displaced so that annular cutting edges 7, 8 and 9 of the ring cut into the wall of the pipe 4, the edges are arranged in step formation so as to cut into the wall successively and with decreasing depth of penetration ending with the edge 9 furthest away from the leading end of the ring. |
