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US Patent: 250,493
Lubricating Wrench
Patentee:
Oliver Brothers, Jr. - Hartland, VT

USPTO Classifications:
81/169, 81/2

Tool Categories:
wrenches : axle nut wrenches : axle nut wrench combination tools

Assignees:
Oliver Brothers, Jr. - Hartland, VT
John H. French - Hartford, VT

Manufacturer:
Frank L. French - Meriden, NH

Witnesses:
John C. Kilby
W. C. McArthur
Z. Hunter
Ebin Clifford

Patent Dates:
Applied: Oct. 17, 1881
Granted: Dec. 06, 1881

Patent Pictures:
Oliver Brothers, Jr. patent December 6, 1881
USPTO pdf tiff
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Description:
The oiler with spring-loaded internal plug is on the back side of a screw-adjusted axle nut wrench. A known example has a threaded stud on the back side; the oil can was absent.

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