US 12,280,481 B2
Torque grip slip force pliers
Harry E. Reckhart, Stoneboro, PA (US)
Assigned to Channellock, Inc., Wilmington, DE (US)
Filed by Channellock, Inc., Wilmington, DE (US)
Filed on Sep. 10, 2015, as Appl. No. 14/850,242.
Application 14/850,242 is a continuation in part of application No. 14/156,511, filed on Jan. 16, 2014, abandoned.
Prior Publication US 2015/0375371 A1, Dec. 31, 2015
Int. Cl. B25B 7/02 (2006.01); B25B 7/10 (2006.01); B25B 13/50 (2006.01)
CPC B25B 7/02 (2013.01) [B25B 7/10 (2013.01); B25B 13/5016 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A compact slip joint pliers that develops a high resultant applied force on a seized cylindrical workpiece and provides a high slip force to prevent slip of the jaws from the gripped cylindrical workpiece, comprising:
a front member comprising a proximately disposed handle and a distally disposed jaw having a face;
a rear member comprising a proximately disposed handle and a distally disposed jaw having a face;
a tongue and groove construction comprising a slot disposed in one of the handles, and a pivot pin slidably operably disposed in the slot for opening and closing the jaws and the jaw faces being in parallel disposition for receiving a cylindrical workpiece;
said handles comprising no more than 10 to 12 inches in overall length including a moment arm of no more than 5 to 6 in. as measured from the pivotal axis;
said jaw faces each include a rectangular portion of a long length and short width comprising angularly disposed rows of pyramidal teeth having a diamond shaped four-sided base and a point apex; wherein said diamond shaped base includes a short axis parallel to the face length portion and long axis parallel to the face width portion;
each one of said pyramidal teeth having said diamond shaped four-sided base and said point apex having equal size as all other pyramidal teeth along each of said jaw faces;
each said long axis of each respective said diamond shaped four-sided base is longer than said short axis of each respective said diamond shaped four-sided base;
wherein the angular disposition of teeth as measured across the apices of teeth is 130°;
wherein each said row of pyramidal teeth comprises 10 teeth/inch measured along the length of the jaw; and
wherein with a grip load force of 45 lb. exerted on the moment arm, a resultant applied force of 200 lb to 300 lb is developed on a gripped cylindrical workpiece; which is a 200-300% improvement over a V-shaped opposed jaws pliers of comparable size and handle configuration.