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US Patent: D27,540
Movable Jaw For Wrenches
Patentee:
John H. Vinton - Boston, MA

USPTO Classifications:
D8/22

Tool Categories:
wrenches : wrench components : wrench jaw components
wrenches : pipe wrenches

Assignees:
Trimont Manufacturing Company - Portland, ME

Manufacturer:
Trimont Manufacturing Company - Roxbury, MA

Witnesses:
George W. Gregory
Addie F. Daniels

Patent Dates:
Applied: Sep. 19, 1896
Granted: Aug. 17, 1897

Patent Pictures: [ 1 | 2 ]
John H. Vinton pipe wrench jaw Pat. Aug. 17, 1897
USPTO pdf tiff
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Description:
Adjustable jaw design for pipe wrenches, marked 'TRIMO PAT 1889-97'. It evolved from design patent no. D19,168.

The jaw design can appear on wrenches with handles and frames based on more recent patents. For example, the 6 inch wood handle example shown in the second photo in this entry has a frame corresponding to the May 27, 1890 patent (no. 429,088), but also incorporating the nut guard feature first patented on Dec. 19, 1911 (no. 1,012,036).

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