US Patent: 1,155,955
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| Improvements in Pipe and Nut Wrenches
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Patentee:
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| George A. Parmenter (exact or similar names) - Boston, MA |
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Patent Dates:
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| Applied: |
Jun. 02, 1915 |
| Granted: |
Oct. 05, 1915 |
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Patent Pictures:
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G. A. Parmenter Pat. Oct. 5, 1915 |
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Stan Schulz
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Description: |
| The sliding casing has a pin that engages notches on the main shank, while the movable jaw attached to the casing has notches which engage an extension on the shank. A spring inside the casing keeps the notches and pins engaged, and the end of the casing extending toward the handle has a gripping surface. This patent and Parmenter's Oct. 16, 1917 patent (no. 1,243,210) are both cited on the quick adjusting pipe and nut wrench his company manufactured. |
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