| 摘要 |
A tool (20) comprising a male member (22) and a female member (24). The male member (22) having a coupling portion (28) projecting rearwardly from a body portion (26). The coupling portion (28) having a frustoconical forward portion (40) and a threaded rear portion (38). The thread (46) having an intermediate section (45) of uniform depth and terminating in forward and rear end (41) parts. The female member (24) having a bore (64) extending rearwardly from a front surface (60). The bore (62) having a frustoconical forward portion (70) and a threaded rear portion (72). The thread (72) having an intermediate section (67) of uniform depth and terminating in forward (66) and rear end (68) parts. Upon threaded coupling of the male (22) and female members (24) to form a tool joint (20) connection, the threaded portion (38) of the male member (22) engages the threaded portion (72) of the female member (24). |
