ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,481, issued on April 22, was assigned to Channellock Inc. (Wilmington, Del.).
"Torque grip slip force pliers" was invented by Harry E. Reckhart (Stoneboro, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A slip-joint pliers having opposed parallel jaws with a specific cross-hatch pyramidal teeth construction develops a high torque grip slip force on a seized or overly tightened cylindrical workpiece such as a pipe or bar. The pliers includes a tongue in groove type slip-joint construction. The cross-hatch teeth are disposed at between 110deg and 150deg, and the rows of cross-hatch teeth are spaced at less than about 10 teeth/inch on each jaw face....