US Patent: 150,301


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US Patent: 150,301

Wrenches

Patentee:

Frank Leo Delfer (exact or similar names) - Burlington, IA

USPTO Classifications:

81/119, 81/186

Tool Categories:

wrenches : axle nut wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Feb. 14, 1874
Granted:	Apr. 28, 1874

Patent Pictures:

Frank L. Delfer Pat. April 28, 1874

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Description:

The patent is for two fixed jaws and a "stop" designed to firmly hold a correspondingly shaped nut; the wrench would have to slide on and off from the side. The wrench is intended to work on axle nuts which typically are recessed in a hub, so it is not clear how this patent could work in a real-world situation.