| 摘要 |
A wrench ( 1 ) is disclosed having a handle ( 3 ) mounted pivotally with a head portion ( 2 ) for engaging a drive socket to tighten or slacken a fastener such as a nut, bolt or screw, and a resilient split ring ( 5 ) as operative portion intermediate the handle ( 3 ) and head portion ( 2 ). The head portion ( 2 ) has an aperture into which the split ring ( 5 ) is sprung to define a radial gap in the split ring ( 5 ) and a camming arm ( 33, 34 ) extending radially outwardly from each end of the split ring ( 5 ) respectively. The split ring ( 5 ) also has stops ( 37, 38 ) engaging the head portion under the natural resilience in the split ring ( 5 ) to prevent undue rotation of the ring in the head portion.
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