US Patent: 6,626,070 - Compound Toggle Link Retention Mechanism


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US Patent: 6,626,070

Compound Toggle Link Retention Mechanism

Patentees:

William D. Peperkorn (exact or similar names) - DeWitt, NE

Thomas O. Miller (exact or similar names) - DeWitt, NE

Brian L. Rahe (exact or similar names) - DeWitt, NE

Robert L. Rhynalds (exact or similar names) - Wilber, NE

USPTO Classifications:

81/369, 81/370

Tool Categories:

wrenches : pliers type wrenches : locking pliers

Assignees:

Irwin Industrial Tool Co. - Freeport, IL

Manufacturer:

Irwin Industrial Tool Co. - Huntersville, NC

Witnesses:

Unknown

Patent Dates:
Applied:	May 04, 2001
Granted:	Sep. 30, 2003

Patent Pictures:

William D. Peperkorn, et. al. patent September 30, 2003

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Irwin Locking Pliers (Vise-Grip) (tm)

Description:

The major feature of the patent is the tabs folded into the center of the lever handle which limit the opening travel of the quick-release for toggle locking tools in patent no. 5,056,070. The patent also describes resilient cover materials for the fixed and lever handles of such tools. Used in the Vise-Grip (tm) Fast-Release (tm) toggle locking tools. The patent has extensive lists of reference patents and prior art.

The patent reflects later stages in VISE-GRIP's transition from family owned Petersen Mfg. Co. to an "asset" of a large multi-national corporation. In that transition, Petersen Mfg. and the original DeWitt, Nebraska manufacturing plant were "liquidated." In 2015, the patents also appear on CRAFTSMAN (tm) branded locking pliers.