US Patent: 474,300
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| Pipe Wrench
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Patentee:
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| George McKercher (exact or similar names) - Jonesville, MI |
| USPTO Classifications: |
| 81/99 |
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Patent Dates:
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| Applied: |
Dec. 15, 1891 |
| Granted: |
May 03, 1892 |
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Patent Pictures:
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George McKercher patent May 3, 1892 |
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Stan Schulz
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Description: |
| Self-adjusting hook jaw; the handle is comprised of two plates with the positioning spring and other parts sandwiched between them. Two alternate shapes are shown for the end of the hook jaw that contacts the spring. The positioning spring is shaped to form most of the handle perimeter. |
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