US Patent: 850,254
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| Pipe Wrench
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Patentee:
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| Edward J. Robbins (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 24, 1906 |
| Granted: |
Apr. 16, 1907 |
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Patent Pictures:
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Edward J. Robbins patent April 16, 1907 |
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Stan Schulz
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Description: |
| An internal screw attached to the sleeve at the end of the handle sets the size adjustment of the movable jaw. A leaf spring helps hold the jaws open. |
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