| 摘要 |
A hydraulic operated tool includes a body (B), a pair of jaws ( 21 ) mounted with respect to the body so that at least one of the jaws is movable between an opened jaw position and a closed jaw position so as to engage workpiece (W) between the jaws. A ram assembly ( 2 ) is disposed in the body and is operatively associated with the jaws. Spring structure ( 1 ) causes the ram assembly to move thereby causing the jaws to initially engage the workpiece with a first force. A pump assembly ( 7 ) exerts fluid on the ram assembly to move the ram assembly further, causing the jaws to exert a second force, greater than the first force, on the workpiece.
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