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US Patent: D19,168
Jaws of a Pipe Wrench
Design for Jaws of a Pipe Wrench
John H. Vinton - Boston, MA

USPTO Classifications:

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

Trimont Manufacturing Co. - Portland, ME

Trimont Mfg. Co. - Roxbury, MA
Trimont Mfg. Co. - Portland, ME

Geo. W. Gregory
Blanche Dewar

Patent Dates:
Applied: Dec. 26, 1888
Granted: Jun. 18, 1889

Patent Pictures: [ 1 | 2 | 3 ]
John H. Vinton design patent June 18, 1889, with jaw from 6 inch TRIMO pipe wrench
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1889 TRIMO pipe wrench (FLICKR)
The distinguishing features of the design are the shape of the adjustable jaw, and the shape of the screw threads. Together with Vinton's Feb. 12, 1889 patent 397,618 and his Nov. 5, 1889 patent 414,663, this is the first TRIMO pipe wrench.

The 1889 patent was noted on the adjustable jaws of TRIMO pipe wrenches for several decades, along with the the date of the next version in design patent no. D27,540.

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