US Patent: 454,893
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| Pipe-Wrench
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Patent Dates:
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| Applied: |
Nov. 26, 1890 |
| Granted: |
Jun. 30, 1891 |
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Patent Pictures:
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J. E. Wakefield Pat. June 30, 1891 |
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Description: |
| The sliding grip piece can be shifted when the handles are fully opened. As the handles close, the grip piece engages the rack on the back of the main shank, and the movable jaw grip tightens. The retractable screwdriver on the end of the handle in the patent drawing has not been observed on any known examples. |
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