US Patent: 448,146
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| Wrench
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Patentee:
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| Adolph Hamelehle (exact or similar names) - Grand Rapids, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 22, 1890 |
| Granted: |
Mar. 10, 1891 |
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Patent Pictures:
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Joseph F. Hartigan patent March 10, 1891 |
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Stan Schulz
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Description: |
| A cam lever on the back side of the movable jaw compresses the jaw against a gib that has gripping teeth. Shims can be inserted between the jaw and gib to compensate for wear. |
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