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US Patent: 540,790
Pipe Tongs
Patentee:
George W. Johnson - Erie, PA

USPTO Classifications:
81/390, 81/DIG.5

Tool Categories:
wrenches : pipe wrenches : pipe tongs
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Erie Manufacturing and Supply Co. - Erie, PA

Witnesses:
V. B. Hillyard
Arthur Oakley
Benjamin E. Reed
Warren M Jordan

Patent Dates:
Applied: Mar. 30, 1895
Granted: Jun. 11, 1895

Patent Pictures: [ 1 | 2 ]
George W. Johnson patent June 11, 1895
USPTO pdf tiff
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Description:
This is an improvement on Johnson's Sept. 22, 1891 patent (no. 460,015). The adjustable jaw bit is marked with a size scale, and is reversible. The hook jaw has a pivotal connection to its handle, with a notch that is the bearing point for a spur of the other handle which adds gripping force to the overall operation.

The adjustable jaw bit was carried over into Johnson's hook jaw pipe wrench patent (no. 737,847).

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