| 摘要 |
A tool with two identical parts which are mounted in articulated fashion on a common axis, about which extends an annular groove in which a restoring spring is fixed, is described. The ends of the spring are mounted in sliding fashion on the limbs of the tool, the spring being constructed as a one-piece body in the form of a U with a curved central region which is mounted in the central annular groove and is adapted in this region to the construction of the tool. Furthermore, the spring has at least one curve on each wing to keep them free of the limbs of the tool, and a hook at the end of each wing to mount them on the corresponding limbs of the tool. <IMAGE> |
