US Patent: 1,367,407
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| Wrench
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Patentee:
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| Oak B. McClurkin (exact or similar names) - Morning Sun, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 09, 1920 |
| Granted: |
Feb. 01, 1921 |
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Patent Pictures:
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1 | 2
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Patent 1,367,407 -- edited drawing |
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Stan Schulz
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Description: |
| Notches in the adjusting "nut" of screw wrench or "Stillson" type pipe wrench and a coordinating spring form an "adjustment lock."
An analogous arrangement applied to adjustable end wrenches appears in parallel patent 1,367,408. |
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