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US Patent: 411,807
Flange Wrench
Patentee:
James F. Guthrie, Jr. - Somerville, MA

USPTO Classifications:
81/102, 81/98

Tool Categories:
wrenches : flange wrenches

Assignees:
James F. Guthrie, Jr. - Somerville, MA
Thomas C. Ashley - Boston, MA

Manufacturer:
Not known to have been produced

Witnesses:
Edward S. Beach
John R. Snow

Patent Dates:
Applied: Aug. 23, 1888
Granted: Oct. 01, 1889

Patent Pictures:
James F. Guthrie Jr., patent October 1, 1889
USPTO pdf tiff
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Description:
Adjustable jaw flange wrench; this type of wrench was used for a specialized type of pipe fitting, where the wrench grips the outside edges of a flat circular face.

More successful flange wrenches used the bolt holes through the flange face as points of attachment.

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