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US Patent: 641,782
Wrench
Wrench For Grain-Separator Cylinders
Patentee:
Frank Kostlan - Traer, IA

USPTO Classifications:
81/57.3

Tool Categories:
wrenches : cylinder tooth wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. F. Groat
A. L. Langill
E. O. Ellison
M. E. Chamberlain

Patent Dates:
Applied: Feb. 24, 1899
Granted: Jan. 23, 1900

Patent Pictures:
Frank Kostlan patent Jan. 23, 1900
USPTO pdf tiff
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Description:
Gear drive in a case, with handle formed of pipe and fittings. A smaller gear driving a larger gear provides mechanical advantage in tightening and loosening nuts.

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