| 摘要 |
This invention relates to an improvement in anchor bolts having a plurality of slots forming sleeve legs having bridge portions of narrow width, said legs being moved outwardly in a drilled masonry well or hole to rigidly engage the well wall upon suitable operation of the bolt. The improvement consists of the provision of suitable stampings in said bridge portions to form projections adapted to engage the well wall in non-rotative engagement upon insertion in a well. Moreover, the stamped out projection re-enforces the narrow bridge portion of the sleeve thereby preventing premature collapse or rollback upon insertion in close-fitting holes.
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