| 摘要 |
The pulling tool has a handle attached to a housing and a lever pivotally attached to the housing. The lever controls a feed pad which applies an upward force to a shaft which slides freely through a bore in the housing in a direction generally perpendicular to the handle. At the end of the shaft is a cone and which cooperates with at least two toothed claws which are pivotally mounted on a lower extension of the housing. Each claw is sloped on its inner edge to cooperate with the sloped edge of the upper part of the cone so that, as the cone moves upward, the claw pivots so that the toothed portion of the claw is forced outward. The cone and claws are selected to fit closely within the opening in the insert. When the lever is depressed, the shaft is lifted, pulling up on the cone which causes the teeth of the claws to penetrate the metal of the insert on its inner diameter to firmly lock into the insert.
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