US Patent: 1,012,036
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Wrench
Nut Guard
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Patentee:
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| John H. Vinton (exact or similar names) - Boston, MA |
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Patent Dates:
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| Applied: |
Jun. 23, 1911 |
| Granted: |
Dec. 19, 1911 |
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Patent Pictures:
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John H. Vinton patent Dec. 19, 1911 -- TRIMO NUT GUARD |
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Stan Schulz
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Description: |
| The "U" shaped nut guards protect against accidental alteration of the adjustment if the wrench rubs against a surface in use. The frame has a modified opening to accommodate them. The feature appears on TRIMO pipe and nut wrenches.
The patent is stamped on the wear surface of the metal "U" -- PAT'D 12-19-11.
See also parallel patent no. 1,012,037 for the "flat washer" style nut guard.
Patent no. 1,430,955 is a later refinement of the nut guard, and shows a frame style that was in use for TRIMO nut wrenches as early as 1912. |
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