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US Patent: 218,106
Bung-Bush Wrench
Patentee:
David Ackerman (exact or similar names) - Chicago, IL

USPTO Classifications:
81/442

Tool Categories:
wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
O. W. Bond
J. C. Polley, Jr.
Patent Dates:
Applied: Dec. 12, 1878
Granted: Aug. 05, 1879

Patent Pictures:
David Ackerman patent August 5, 1879
USPTO (New site tip)
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Description:
The wrench is in two halves that are loosely connected, with a wedge-shaped expansion feature at the top.

This is simpler than Ackerman's March 11, 1879 patent (no. 213,026), and also simpler than F. P. Bump's April 29, 1879 patent (no. 214,755).

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