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US Patent: 3,606,806
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: May 09, 1968
Granted: Sep. 21, 1971

Patent Pictures: [ 1 | 2 ]
Frank Patrick patent Sept. 21, 1971
USPTO pdf tiff
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Description:
The size adjustment is set by a screw, and has a "locking screw" collar. The lock release is a secondary lever on the lever handle that presses on a projection extending from the toggle link. This arrangement for the lever handle and lock release facilitates one-handed operation.

Produced as the CHANNELLOCK No. 950 TOG-L-LOK Locking pliers, which is marked with this patent and 3,545,315.

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