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US Patent: 1,613,229
Joseph E. Kenerson - Saugus, MA

USPTO Classifications:
81/100, 81/104

Tool Categories:
wrenches : wrench components : wrench jaw components

Trimont Manufacturing Company - Roxbury, MA

Trimont Manufacturing Company - Roxbury, MA


Patent Dates:
Applied: May 21, 1926
Granted: Jan. 04, 1927

Patent Pictures: [ 1 | 2 ]
Joseph E. Kenerson patent January 4, 1927, with 6 inch TRIMO nut wrench marked PATD 12-19-1911
USPTO pdf tiff
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The patent is for a circular nut guard for "TRIMO" type adjustable wrenches. The guard is of slightly larger diameter than the adjusting nut, and is to prevent accidental alteration of the jaw adjustment from rubbing friction on the adjusting nut. The patent date is stamped on the side adjacent to the wrench frame.

This guard is found on later production of TRIMO wrenches, and represents an improvement on the nut guard in patent no. 1,012,037. Patent nos. 1,012,036 and 1,430,955 are two generations of the alternate "U" shaped nut guard used by TRIMO.

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