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US Patent: 2,624,222
Adjustable Jaw Internal Wrench With Threaded Handle
Plumber's Spud-Wrench
Alfred R. Joy - West Hartford, CT

USPTO Classifications:
81/168, 81/437, 81/447

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

R. M. Starbuck and Sons - Hartford, CT

R. M. Starbuck and Sons - Hartford, CT

none listed

Patent Dates:
Applied: May 05, 1950
Granted: Jan. 06, 1953

Patent Pictures:
Alfred R. Joy patent January 6, 1953
USPTO pdf tiff
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The patent's features are: ability to grip internal surfaces, telescopic action with a jaw on each section, and the jaws stay aligned. One jaw is fixed to the outer sleeve; the second jaw attaches to the adjusting screw. The attachments are made by removable pins to allow the parts to be replaced if they wear or break. The pins also serve to keep the jaw alignment.

U.S. Patent nos. 1,301, 378,584, 850,900, 1,121,229, and French patent no. 13,381 (1855) are cited as references.

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