US Patent: 508,338 - Clevis Hook


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US Patent: 508,338

Clevis Hook

Patentee:

James K. Poole (exact or similar names) - Lytch, NC

USPTO Classifications:

278/96

Tool Categories:

agricultural : clevises

Assignees:

M. M. McKinnon - Laurinburg, NC

Manufacturer:

C. McKinnon - Laurinburg, NC

Witnesses:

Patent Dates:
Applied:	Jun. 30, 1893
Granted:	Nov. 07, 1893

Patent Pictures: [ 1 | 2 ]

U.S, patent 508,338 - edited image

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Description:

The hook's shape is to allow uneven movement of draft animals to not affect the straightness of the furrow, and to allow a single tree to easily be detached.

It appears in a McKinnon's Patent Plow Clevis advertised in the mid-1890s. An IRON AGE write-up for the clevis noted the wrench-headed pin fit two sizes of nuts.