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US Patent: 553,008
Wrench
Patentee:
Frank Emilius Lodetti - Rondout, NY

USPTO Classifications:
81/163, 81/164

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. M. Cusack
Percy J. Griffith
Jennie Hyde
Artemas S. Walker

Patent Dates:
Applied: Jan. 28, 1895
Granted: Jan. 14, 1896

Patent Pictures:
Frank Emilius Lodetti patent January 14, 1896
USPTO pdf tiff
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Description:
Screw adjustment using a left- and right-hand threaded shank and parallel stabilizing shaft. The patent applies the principle to nut wrench and combination wrench designs.

The idea of a combined handle and adjusting shaft with left- and right-hand was a European traditional form.

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