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US Patent: 426,223
Pipe Wrench
Patentee:
Friedrich Virgien - Yonkers, NY

USPTO Classifications:
81/106, 81/146, 81/97, 81/DIG.6

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Henry Huber
Carl Karp
Paul Goepel

Patent Dates:
Applied: Apr. 19, 1889
Granted: Apr. 22, 1890

Patent Pictures:
Friedrich Virgien patent April 22. 1890
USPTO pdf tiff
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Description:
Quick adjustment movable jaw. A spring between the back of the movable jaw frame and main shank holds a gripping pawl in the front portion of the movable jaw in engagement with rack teeth on the main shank. The drawings show alternate forms for the fixed and movable jaws, and details of the spring and related portions of the movable jaw frame. The smaller form was intended to correspond to a "pocket wrench" form.

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