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US Patent: 2,628,521
Plier-Wrench
Patentees:
Nels Berglund - Duluth, MN
August Berglund - Duluth, MN

USPTO Classifications:
81/342, 81/377, 81/403

Tool Categories:
wrenches : pliers type wrenches : locking pliers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Mar. 02, 1950
Granted: Feb. 17, 1953

Patent Pictures:
Nels and August Berglund patent Febr. 17, 1953
USPTO pdf tiff
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Description:
The jaws remain roughly parallel throughout the range of adjustment, and the linkage includes an "over-center" grip locking feature. It also has a stop to limit the distance the handles can separate from each other.

The patent cites previous patents 449,627, 1,280,405, 2,206,251, 2,471,734, 2,481,435, 2,496,308, 2,498,235, and 2,519,630.

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