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US Patent: 57,436
Plow-Clevis
Improvement in Plow-Clevis
Patentee:
George P. Darrow - Cincinnati, OH

USPTO Classifications:
278/96.2, 411/418

Tool Categories:
wrenches

Assignees:
Joseph Hargrave - Cincinnati, OH
George P. Darrow - Cincinnati, OH

Manufacturer:
Not known to have been produced

Witnesses:
Frank Millward
H. G. Webber
Geo. H. Knight
James H. Layman

Patent Dates:
Granted: Aug. 21, 1866

Patent Pictures:
George P. Darrow Pat. Aug. 21, 1866
USPTO pdf tiff
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Description:
The patent is for the interrupted threads on the pin and in the corresponding socket in the clevis. The wrench head on the pin is not mentioned in the specifications, but is also shown on Darrow's complementary design patent (no. D2,674).

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