US Patent: 845,187
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| Wrench
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Patentee:
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| James MacLean (exact or similar names) - Boston, MA |
| USPTO Classifications: |
| 81/99 |
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Patent Dates:
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| Applied: |
Aug. 24, 1906 |
| Granted: |
Feb. 26, 1907 |
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Patent Pictures:
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James MacLean patent Feb. 26, 1907 |
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Stan Schulz
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Description: |
| Hook jaw pipe wrench with a spring to push the jaw "closed." The jaw pivots on a cam-shaped surface and is held in place by a rocking yoke.
A known example marked with the patent date also is marked, "No. 1 Union Wrench / Potter Mfg." |
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