US Patent: 1,378,209


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Wrench

Patentee:

Jerome E. Bergman (exact or similar names) - Buffalo, NY

USPTO Classifications:

81/165, 81/177.1, 81/DIG3

Tool Categories:

wrenches : nut wrenches

wrenches : wrench adjustment types : screw adjust wrenches

Assignees:

None

Manufacturer:

Bergman Tool Mfg. Co. - Buffalo, NY

Witnesses:

none listed

Patent Dates:
Applied:	May 08, 1919
Granted:	May 17, 1921

Patent Pictures: [ 1 | 2 ]

Jerome E. Bergman patent May 17, 1921

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Description:

The drawing shows a curved handle adjustable open end wrench like those manufactured by Bergman. The main feature of the patent is a friction adjustment lock. This adjustment lock was not included in the Bergman Queen City line of curved handle adjustables.