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US Patent: 3,545,316
Pliers
Patentee:
Frank Patrick - Meadville, PA

USPTO Classifications:
81/368

Tool Categories:
wrenches : pliers type wrenches : locking pliers

Assignees:
Channellock, Inc. - Meadville, PA

Manufacturer:
Channellock, Inc. - Meadville, PA

Witnesses:
none listed

Patent Dates:
Applied: Jul. 11, 1968
Granted: Dec. 08, 1970

Patent Pictures: [ 1 | 2 ]
Frank Patrick patent December 8, 1970
USPTO pdf tiff
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Description:
The focus of this patent is the two-stage movement during release of the lock. This two-stage movement is effected by the sliding connection between the adjustable link and the main lever handle. The same feature is shown in Patrick's parallel patent (no. 3,545,315), and appears on the CHANNELLOCK No. 910 GRIP-LOCK pliers.

The specifications cite patent nos. 2,853,910 and 2,997,903 as references.

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