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US Patent: D27,824
Pump Wrench
Patentee:
Oscar P. Trahern - Rockford, IL

USPTO Classifications:
D8/28

Tool Categories:
wrenches : auxiliary wrenches

Assignees:
None

Manufacturer:
Trahern Pump Company - Rockford, IL

Witnesses:
L. I. Rundquist
A. O. Behel
Jerre C. Blake
E. Behel

Patent Dates:
Applied: Sep. 17, 1897
Granted: Nov. 09, 1897

Patent Pictures:
Oscar P. Trahern design patent Nov. 9, 1897
USPTO pdf tiff
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Description:
Design to fit two sizes of hexagon. P.T. Rathbone's "History of the Old Time Farm Implement Companies and the Wrenches They Issued" shows an example of the O.P. Trahern pump wrench.

Term of patent 3 1/2 years.

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