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US Patent: 2,370,308
Self-Locking Pliers
Patentee:
Abraham G. Hanson - Monrovia, CA

USPTO Classifications:
74/96, 81/329, 81/381

Tool Categories:
pliers

Assignees:
None

Manufacturer:
Ross Mfg. Co. - San Francisco, CA

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 12, 1943
Granted: Feb. 27, 1945

Patent Pictures: [ 1 | 2 ]
Abraham G. Hanson Pat. Feb. 27, 1945
USPTO pdf tiff
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Description:
The action of the secondary pivot point locks the grip as the pliers is closed, and increases the pressure of the grip as the jaws approach closure.

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