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US Patent: 78,299
Improvement in Pipe-Wrenches
Patentee:
Nardo F. Loi - New York, NY

USPTO Classifications:
81/185.1, 81/389, 81/397, 81/423

Tool Categories:
wrenches : pipe wrenches : pipe tongs

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William F. McNamara
Alex. F. Roberts

Patent Dates:
Granted: May 26, 1868

Patent Pictures:
N. F. Loi Pat. May 26, 1868
USPTO pdf tiff
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Description:
A series of interchangeable jaw pieces adapt the tongs type handles to several wrench and tongs functions. The block containing the pivot point is threaded so one leg of the tongs can be threaded in and out to change the distance between the jaw faces.

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